- الرئيسية
- عن الجامعة
- رائده عايد سليمان العطوي
رائده عايد سليمان العطوي
أستاذ بقسم الكيمياء بكلية العلوم بجامعة تبوك
تخصص كيمياء عضوية
تخصص كيمياء عضوية
السيرة الذاتية
جدول الدراسة
الابحاث والمؤلفات
المشاريع البحثية
الجوائز
الخبرات والمناصب الإدارية
- أستاذ مشارك في الكيمياء العضوية
- مشرفة قسم الكيمياء الحيوية بكلية العلوم من عام 1438 هـ وحتى الآن
- وكيلة كلية الغد الدولية للعلوم الطبية التطبيقية بتبوك لمدة عامين اعتبارا من 2013- 2015م
- وكيلة كلية العلوم الطبية التطبيقية بجامعة الجوف
- مشرفة على السنة التحضيرية بجامعة الجوف
- رئيسة لجنة الاختبارات المركزية بكليتي المجتمع والعلوم الطبية التطبيقية بجامعة الجوف
- رئيسة لجنة النظر في أعذار طالبات كليتي المجتمع والعلوم الطبية التطبيقية بجامعة الجوف
- رئيسة لجنة اختبارات القدرات العامة بالمرحلة الأولى للعام 1437 هـ بنات بجامعة الجوف
- مشرفة للشؤون الأكاديمية بشطر الطالبات بكلية العلوم
- رئيسة للجنة تأديب الطالبات بكلية العلوم عام 1438 هـ
- منسقة للأقسام الأكاديمية في لجنة استقبال الطالبات المستجدات بكلية العلوم
- رئيسة لجنة سير ومتابعة الاختبارات المركزية بشطر الطالبات بكلية العلوم عام 1438 هـ
- رئيسة قسم الكيمياء بكلية التربية للبنات الأقسام العلمية لمدة عامين 1425-1427 هـ
- رئيسة النشاط الاجتماعي للأقسام العلمية
- رئيسة كونترول قسم الفيزياء
- عضو في اللجنة الدائمه للترقيات العلمية في الجامعه
- عضو في اللجنة العلمية بقسم الكيمياء
- منسق مقرر مطيافية المركبات العضوية للعام 1445 هـ
- رئيس لجنة مناقشة مقرر مشروع البحث للفصل الدراسي الأول 1445 هـ
- أستاذ في الكيمياء العضوية
- عضو في لجنة الخطط والمناهج بقسم الكيمياء
- عضو اللجنة الدائمة للترقيات العلمية لأعضاء هيئة التدريس بالجامعة لعام 1446 هـ
- عضو لجنة المقترحات والتظلمات بكلية العلوم لعام 1446 هـ
- عضو لجنة الخريجين والتدريب بقسم الكيمياء للعام الجامعي 1446هـ
- عضو اللجنة العلمية بقسم الكيمياء للعام الجامعي 1446هـ
- رئيسة مناقشة مقرر التدريب للفصل الدراسي الثاني 1446هـ بشطر الطالبات
- منسقة مقرر ميكانيكية التفاعلات العضوية Chem431 للفصل الدراسي الثاني 462
المؤهلات العلمية
- بكالوريوس في العلوم والتربية تخصص كيمياء
- ماجستير العلوم في الكيمياء تخصص كيمياء عضوية
- دكتوراه الفلسفة في العلوم تخصص كيمياء عضوية
الاهتمامات البحثية
تحضير العديد من المركبات الحلقية غير المتجانسة ذات التأثير الحيوي
تحضير أنظمة فوتو كرومية وثيوموكرومية جديدة
التطبيقات الجديدة للمركبات العضوية الفوتو كرومية
الكيمياء الضوئية و تقنية النانو
المحافظة على البيئة من التلوث
البحث عن مصاد جديده للمياه
زيادة المساحات الخضراء من حولنا
| اليوم | المادة | الوقت |
|---|---|---|
| الأحد | أساسيات الكيمياء | 08:00 - 10:00 |
| الأحد | تدريب (1) | 18:00 - 21:00 |
| الثلاثاء | تدريب (1) | 18:00 - 21:00 |
| الأربعاء | كيمياء البترول والبتروكيماويات | 08:00 - 10:00 |
| الخميس | ميكانيكية التفاعلات العضوية | 10:00 - 12:00 |
Adsorption and removal of Pb (II) via layer double hydroxide encapsulated with chitosan; synthesis, characterization adsorption isotherms, kinetics, thermodynamics …
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2024.137517
An Ultramicroporous Zinc?Based Zeolitic Imidazolate Framework?8 for the Adsorption of CO2, CH4, CO, N2 and H2: A Combined Experimental and Theoretical …
ChemistrySelect
DOI
10.1002/slct.202402556
Construction of Amino?Functionalized Molecularly Imprinted Silica Particles for (±)?Ofloxacin Chiral Separation
ChemistrySelect
DOI
10.1002/slct.202204455
Design of ion-imprinted cellulose-based microspheres for selective recovery of uranyl ions
Carbohydrate Polymers
DOI
10.1016/j.carbpol.2023.120873
Development of carboxylated/thiolated phenolic resin via click chemistry for chiral separation of salbutamol racemate
SEPARATION AND PURIFICATION TECHNOLOGY
DOI
10.1016/j.seppur.2025.132556
Development of strontium aluminate embedded photochromic cellulose hydrogel for mapping of fingermarks
INORGANIC CHEMISTRY COMMUNICATIONS
DOI
10.1016/j.inoche.2023.110669
Diels-Alder click chemistry-engineered ion-imprinted polymer for highly selective Gd3+ extraction from aqueous solutions
REACTIVE & FUNCTIONAL POLYMERS
DOI
10.1016/j.reactfunctpolym.2025.106307
Effect of thickness on structural and optical characteristics of Indium Phthalocyanine Chloride thin films for photodiode devices
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
DOI
10.1007/s10854-020-04959-3
Effective synthesis and characterization of citric acid cross-linking of modified ferrous metal-organic framework and chitosan nanocomposite sponge for Th (IV) elimination …
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2024.136194
Electrical and photoelectrical properties of a vacuum-deposited MnClPc/n-Si heterojunction for photodiode application
SUPERLATTICES AND MICROSTRUCTURES
DOI
10.1016/j.micrna.2022.207239
Electrospun nanofiber chitosan/polyvinyl alcohol loaded with metal organic framework nanofiber for efficient adsorption and removal of industrial dyes from waste water …
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2025.140086
Enantio-selective molecularly imprinted ?-resorcylic acid-modified resin for chiral separation of cathinone
MATERIALS CHEMISTRY AND PHYSICS
DOI
10.1016/j.matchemphys.2023.127932
Enantio?separation of (±)?ibuprofen racemic mixture using functionalized molecularly imprinted resorcinol formaldehyde resin
POLYMER INTERNATIONAL
DOI
10.1002/pi.6457
Enhancing trimethoprim pollutant removal from wastewater using magnetic metal-organic framework encapsulated with poly (itaconic acid)-grafted crosslinked chitosan composite …
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2024.131947
Ion-imprinted aminoguanidine-chitosan for selective recognition of lanthanum (III) from wastewater
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2024.132193
Linear and nonlinear optical characteristics of manganese phthalocyanine chloride/polyacetate sheet: Towards flexible optoelectronic devices
OPTICAL MATERIALS
DOI
10.1016/j.optmat.2021.110988
Post-crosslinked sulfonated molecularly imprinted polymer via thiol-maleimide click chemistry for chiral recognition of S-chlorpheniramine
MICROCHEMICAL JOURNAL
DOI
10.1016/j.microc.2025.114139
Preparation of chromium (III) ion-imprinted polymer based on azo dye functionalized chitosan
Carbohydrate Polymers
DOI
10.1016/j.carbpol.2022.119139
Production of biologically active non?woven textiles from recycled polyethylene terephthalate
LUMINESCENCE
DOI
10.1002/bio.4462
Selective removal of uranyl ions using ion-imprinted amino-phenolic functionalized chitosan
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2023.124073
Sustainable nanofibrous cellulose-based hydrogel beads derived from cigarette filter waste, functionalized with hyaluronic acid and encapsulated in chitosan/polyethylenimine …
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2025.146780
Synthesis and characterization of magnetic aluminum metal-organic frameworks encapsulated with chitosan and carboxymethyl cellulose for effective elimination of atrazine from …
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2024.137359
Synthesis of nanostructured silica particles for controlled release of ascorbic acid: Microstructure features and in vitro scratch wound assay
Biotechnology Journal
DOI
10.1002/biot.202300078
Synthesis of photo-crosslinkable hydrogel membranes for entrapment of lactase enzyme
REACTIVE & FUNCTIONAL POLYMERS
DOI
10.1016/j.reactfunctpolym.2022.105159
Synthesis of pomegranate peel-activated carbon encapsulated onto carboxymethylcellulose and polyethylenimine for cadmium (II) adsorption: Optimization, kinetics and isotherm …
International Journal of Biological Macromolecules
DOI
10.1016/j.ijbiomac.2025.143348
Tailored ion-imprinted polymer for europium (III) recovery: A cellulose-based click chemistry approach
Journal of Water Process Engineering
DOI
10.1016/j.jwpe.2025.108061
Tailoring diselenide Schiff bases with diphenyl ether units for enhanced corrosion inhibition in oilfield conditions
JOURNAL OF MOLECULAR LIQUIDS
DOI
10.1016/j.molliq.2025.128548
Thiosemicarbazide-modified/ion-imprinted phenolic resin for selective uptake of cadmium ions
MATERIALS CHEMISTRY AND PHYSICS
DOI
10.1016/j.matchemphys.2021.124433
Towards efficiency enhancement of earth abundant Cu2BaSn(S,Se)4 chalcogenide solar cell using In2S3 as efficient electron transport layer
Solar Energy
DOI
10.1016/j.solener.2024.112698
| اسم المشروع | وصف المشروع |
|---|---|
| Synthesis and characterization of ion‐imprinted resin for selective removal of UO2(II) ions from aqueous medium | In this work, uranyl ion-imprinted resin based on 2-(((4-hydroxyphenyl)amino)methyl)phenol was synthesized by condensation polymerization of its uranyl complex in presence of resorcinol and formaldehyde cross-linkers Numerous instrumental techniques including elemental analysis, Fourier transform infrared spectroscopy, ultraviolet, 1H along with 13C nuclear magnetic resonance spectroscopy have been employed for complete characterization of the synthesized ligand and its uranyl complex Additionally, the obtained ion-imprinted and non-imprinted resins were investigated using scanning electron microscope and Fourier transform infrared spectroscopy The effects of various essential parameters such as pH, temperature and contact time on removal of uranyl ions have been examined, and the results indicated that the obtained resin exhibited the optimum activity at pH 5 Furthermore, the adsorption process was spontaneous at all studied temperatures and followed the second-order kinetics model Also, Langmuir adsorption isotherm exhibited the best fit with the experimental results with maximum adsorption capacity 1393 mg/g Moreover, the selectivity studies revealed that the ion-imprinted resin exhibited an obvious affinity toward the uranyl ions in presence of other metal ions compared with the non-imprinted resin Copyright © 2015 John Wiley & Sons, Ltd |
| PEO/PVDF Nanocomposites Preparation with Functionalized Single Walled Carbon Nanotube | System of PEO/PVDF blend with functionalized single walled carbon nanotubes (SWCNTs-COOH) were prepared The enhanced material properties realized in conventional polymer nanocomposites using different techniques were discussed The results showed that SWNTs-COOH were covalently linked with the blend through OH and C-C bonds The intensities of some characteristic vibrational bands for those SWCNTS blends are decreased due to amorphous regions of the prepared samples The results data are augmented with increases of SWCNTS and the possibility of SWCNTs-COOH to be attached with OH group in the side chain of the polymeric matrices The interaction between SWCNTs and the blend results in decreasing crystallinity with rich amorphous phase The amorphous nature is responsible for higher conductivity The estimated values of the energy gap were increased due to charge transfer complexes Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) illustrated that SWNTs were well dispersed into the polymeric matrix and wrapped with polymer chains The properties of the blend were enhanced by the presence of SWNTs Keywords: |
| Synthesis and characterization of photo-crosslinkable4-styryl-pyridine modified alginate | In this article photo-crosslinkablestyryl-pyridine modified alginate (ASP-Alg) was prepared and entirely investigated utilizing different instrumental techniques such as Elemental analysis, Fourier transform infrared (FTIR),13C and 1H nuclear magnetic resonance (NMR), ultraviolet-visible light (UV-vis), X-ray diffraction (XRD) spectra and scanning electron microscope (SEM) |
| synthesis, characterization and biological evaluation of novel 1-N-Substituted Thiocarbomoyl-3- ferrocenyl-2-pyrazoline Derivatives | System of PEO/PVDF blend with functionalized single walled carbon nanotubes (SWCNTs-COOH) were prepared The enhanced material properties realized in conventional polymer nanocomposites using different techniques were discussed The results showed that SWNTs-COOH were covalently linked with the blend through OH and C-C bonds The intensities of some characteristic vibrational bands for those SWCNTS blends are decreased due to amorphous regions of the prepared samples The results data are augmented with increases of SWCNTS and the possibility of SWCNTs-COOH to be attached with OH group in the side chain of the polymeric matrices The interaction between SWCNTs and the blend results in decreasing crystallinity with rich amorphous phase The amorphous nature is responsible for higher conductivity The estimated values of the energy gap were increased due to charge transfer complexes Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) illustrated that SWNTs were well dispersed into the polymeric matrix and wrapped with polymer chains The properties of the blend were enhanced by the presence of SWNTs Keywords: |
| Synthesis, characterization and biological evaluation of some novel nitrogen and sulphur containing organometallic heterocycles | A series of some novel sulphur and nitrogen containing ferrocenyl linked heterocyclic compounds were synthesized by multistep reactions and evaluated for in vitro antimicrobial activity against 15 ATCC strains out of which 8 were bacterial (Pseudomonas aeruginosa, Streptococcus bovis, Enterococcus faecalis, Klebsiella pneumoniae, Escherichia coli, Enterobacter cloacae, Methicillin-resistant Staphylococcus aureus and Streptococcus mutans) and 7 were fungal (Candida albicans, Candida dubliniensis, Candida glabrata, Candida parapsilosis, Candida tropicalis, Candida kefyr and Candida krusei) strains The results clearly depict that the compounds (1–12) gave an average antimicrobial activity against the tested strains with an exception of compound 12 which stood out in terms of its activity against the tested organisms All these compounds gave a range of MIC value between 32–64 lg/ml against S bovis, E coli and C tropicalis except compound 12 which gave a MIC of 16 lg/ml against each of them The MIC values of all these compounds against biofilm forming P aeruginosa and S mutans were 64–256 lg/ml and 64–128 lg/ml respectively which is apparently high, concluding that these compounds hold immense potential to be employed as a two in one formulation of antibacterial as well as antifungal agents ª 2015 The Authors Production and hosting by Elsevier BV on behalf of King Saud University This is an open access article under theCCBY-NC-NDlicense |
| Novel Pyrazoline‐based Organometallic Compounds Containing Ferrocenyl and Quinoline units: Synthesis, Characterization and Microbial susceptibilities | Some novel pyrazoline‐based organometallic compounds were synthesized as new leads in antimicrobial chemotherapy The structures of compounds were elucidated by different spectroscopic techniques and elemental analyses All compounds were investigated for in vitro antimicrobial studies against fifteen ATTC bacterial and fungal strains The microbial susceptibility of these compounds revealed that all the tested compounds gave good minimum inhibitory concentration (MIC) values against the tested organisms that are either similar or even better than the reference drugs amoxicillin and fluconazole, which gave MIC values 8‐64 μg/ml against bacterial and 64 μg/ml against fungal strains, respectively Among all compounds, compound (4d) 1‐(5‐(4‐chlorophenyl)‐3‐ferrocenyl‐4,5‐dihydropyrazol‐1‐yl)‐2‐quinolin‐8‐yloxy) ethanone, emerged out the most promising antimicrobial organometallic derivative with MIC values against all the strains ranging from 8‐32 μg/ml Other compounds gave a range of MIC values between 16‐64 μg/ml against S bovis, 16‐32 μg/ml against E coli, and C tropicalis except compound (4d) which gave MIC 8 μg/ml against S bovis and E coli, whereas 32 μg/ml against C tropicalis Collectively, these compounds gave a lower MIC value between 32‐64 μg/ml against both of the biofilm forming strains namely, P aeruginosa and S mutans The results of microbial susceptibility concluded that these novel organometallic compounds are new leads in antimicrobial chemotherapy and can be very useful for further optimization work on microbial chemotherapy |
| Chiral separation of (±)-methamphetamine racemate using molecularly imprinted sulfonic acid functionalized resin | In the present study, a sulfonic acid functionalized enantio-selective resinous material was developed for effective chiral separation of (±)-methamphetamine racemate R-methamphetamine-sulfonamide phenolic derivative was first prepared and fully characterized utilizing instrumental and spectroscopic techniques |
| Influence of hydroxyapatite nanoparticles on the properties of glass ionomer cement | tGlass ionomer cement (GIC) is an important restorative dental biomaterial which is uti-lized in filling, lining and adhesion restoration The aim of this work is the enhancementof the mechanical, morphological, antibacterial and fluoride release properties of the glassionomer cement by incorporation of different wt% of nano hydroxyapatite powder (HA)The result of this work refers to that, the addition of nano-HA to GIC enhance its fluorideion release, compressive strength and antibacterial effect against Streptococcus mutans andthe bacterial inhibition zone reached to about 86 mm when 8% HA wt% is used This sug-gests that addition of nano-HA particles to GIC to produce GIC-HA hybrids which can beused as suitable materials for improving its fluoride ion release, mechanical properties andinhibiting residual bacteria in dentine© 2018 Brazilian Metallurgical, Materials and Mining Association Published by ElsevierEditora Ltda This is an open access article under the CC BY-NC-ND license( |
| Preparation of photo-crosslinkable cinnamate modified hyaluronic acid for immobilization of horseradish peroxidase | magnetic resonance (NMR) During the UV irradiation, the progress of the cross-linking reaction was monitored by the UV–vis light spectroscopy In addition, when the photo-induced cross-linking had accomplished, the morphological appearance of the hydrogel membrane was recorded using a scanning electron microscope (SEM) |
| Synthesis and Characterization of Organo- Montmorillonite Clay and its Metal complexes for Polypropylene Clay Nano composites Applications | 1-acetylpyridinium Chloride-salicyolhydrazone (H2ACSH) was prepared from Salicylaldehyde and 1-acetylpyridinium chloride hydrazide for using in modification of sodium montmorillonite clay in order to prepare organo - montmorillonite clay (OMC) and its Zinc (OMC-Zn) and Zirconium (OMC-Zr) complexes in two different weight percentage (3 and 7 wt %) Polypropylene /clay nanocomposites were prepared by melt intercalation technique using the prepared organo - montmorillonite clay and its metal complexes The obtained nanocomposites were characterized by infrared absorption spectroscopy (FTIR) and atomic force microscopy (AFM) to determine the morphology of obtained materials The thermal behavior was evaluated from thermo gravimetric analysis (TGA) The combustion behavior of these intercalated ratios was studied using cone calorimeter measurement to assess the PP/clay nanocomposites behavior during combustion The obtained results indicate decreased flammability properties of PP/clay nanocomposites due to better char enhancement The new clay provides an occasion for polymer / clay melt intercalation to obtain composites materials with important properties |
| Nanocomposite Melt Spun PET fibers for Environmental Remediation | POLYETHYLENE terphthalate /Montmorillonite clay nanocomposites were prepared after modification of Montmorillonite (MMT) clay using different concentration of Dimethyl di(hydrogenated tallow) ammonium chloride modifier The characterization of the prepared nanocomposites includes Fourier-transform infrared (FTIR), thermal gravimetric analysis (TGA) and scanning electron microscope (SEM) Fibers of pure polyethylene terphthalate (PET) and Polyethylene terphthalate/Montmorillonite clay nanocomposite (PET/MMT) were produced using melt spinning technique and the prepared fibers were characterized using thermal gravimetric in addition to SEM analysis The results show that the nanocomposite fibers have higher thermal stability than pure polyethylene terphthalate fibers in addition to high degree in homogeneity between PET and MMT clay in PET/MMT nanocomposite PET/MMT nanocomposite fiber with modified MMT 2% has been modified by grafting of MAA under variable conditions of monomer and initiator concentrations as well as grafting time and temperature The grafted fiber has been used in water treatment by removing of cationic dye under different conditions as pH values, and dye adsorption time |
| Effect of thickness on structural and optical characteristics of Indium Phthalocyanine Chloride thin films for photodiode devices | Indium phthalocyanine chloride, InPcCl, in the form of thin films were prepared with different thicknesses by thermal evaporation technique X-ray diffraction showed a hump at 2h = 28, which identified that the prepared InPcCl films have an amorphous structure The particle size increased from 56 to 357 nm with increased film thickness as indexed by Atomic Force Microscope technique The transmittance and reflectance spectral distribution of InPcCl films was measured through a range of 250–2500 nm of wavelength The optical transition is indirectly allowed with two optical energy gaps (Eg1 = 137 eV and Eg2 = 284 eV) for InPcCl thin films, which are smaller than other phthalocyanine films The dispersion parameters were calculated for the different film thickness of InPcCl films from refractive index analysis in the region of normal dispersion The linear, third-order, non-linear refractive index and non-linear susceptibility have also been measured The optical limiting response was evaluated for the InPcCl films under the He–Ne laser and a green diode laser The InPcCl film of thickness 95 nm exhibits the highest output power values and the normalized power This advanced result will hopefully apply to the field of photodiode devices in an industrial approach |
| Amidoxime modified chitosan based ion-imprinted polymer for selective removal of uranyl ions | Ion-imprinting strategy was utilized in the development of UO2(II) imprinted amidoxime modified chitosan sorbent (U-AOCS) that can selectively remove UO2(II) from water First, cyanoactic acid was linked to the chitosan –NH2 groups and then the inserted –CN groups were converted into amidoxime moieties, which chelate the UO2(II) ions and then the polymer chains were cross-linked by glyoxal The UO2(II) ions have been then eluted leaving their matching recognition sites The prepared U-AOCS along with the control NIP displayed maximum capacities toward the UO2(II) ions around 332 and 186 mg/g, respectively, and the isotherms were interpreted better by the Langmuir model in both adsorbents Moreover, the selective uptake of the uranyl ions in multi-ionic aqueous solutions containing the tetravalent Th(IV) ions, trivalent Al(III), Eu(III), and Fe(III) ions, beside the divalent Pb(II), Co(II), Ni(II), Cu(II) ions confirmed the successful creation of a considerable UO2(II) ions selectivity in the U-AOCS construction In addition, the U-AOCS adsorbent displayed economic feasibility by maintaining around 95 % of its initial efficiency after the regeneration and reuse for 5 adsorption/desorption cycles |
| Linear and nonlinear optical characteristics of manganese phthalocyanine chloride/polyacetate sheet: Towards flexible optoelectronic devices | Thin films of manganese phthalocyanine chloride (MnPcCl) were prepared using a thermal deposition onto a polyacetate sheet substrate The structure analyses of the obtained MnPcCl thin films of different thicknesses ranging from 55 to 125 nm were investigated using the X-ray diffraction technique The transmittance and reflectance of MnPcCl thin films were measured at the normal incident light in the 200–2500 nm wavelength range The absorption coefficient analysis revealed that the films were characterized by indirect allowed transition with two energy gaps The Wemple-DiDomenico single oscillator model explained the refractive index’s dispersion behavior, and dispersion parameters were calculated The third-order nonlinear optical susceptibility (χ(3)) and nonlinear refractive index (n2) were determined using Miller’s principles Optical limiting behavior was estimated using the He–Ne (633 nm) and green (533 nm) lasers power The obtained results indicate that MnPcCl films are excellent nonlinear optical materials for optical limiters |
| Thiosemicarbazide-modified/ion-imprinted phenolic resin for selective uptake of cadmium ions | Cd(II)-imprinted Cd(II) resin obtained from a thiosemicarbazide derivative of salicylic acid was prepared and evaluated for selective uptake of Cd(II) ions In the beginning, the thiosemicarbazide derivative of salicylic acid (H2TCS) was developed as a functional ligand that was then coordinated with Cd(II) ions to obtain the Cdcomplex [CdTCS(H2O)3] After the full investigation of the ligand and its complex, they copolymerized with resorcinol in presence of formalin, and the obtained resinous material was eluted with 01 M HNO3 solution to extract the polymer incorporated Cd(II) ions and finally produce the Cd(II) ions selective Cd-RTCS sorbent The maximum cadmium ions capacity by the Cd-RTCS reached 164 ± 1 mg/g, which could be a relatively high and promising value Also, the adsorption isotherms were interpreted better with the Langmuir model In addition, the Cd(II) sorption using Cd-RTCS was tested in a competitive medium of Pb(II), Ni(II), Zn(II), and, Cu(II) ions and the results indicated a considerable selectivity toward the Cd(II) ions over the coexisted metals |
| Synthesis of photo-crosslinkable hydrogel membranes for entrapment of lactase enzyme | Polyvinyl alcohol (PVA) cinnamate ester derivative (PVCN) was prepared by partial esterification of PVA using cinnamoyl chloride with various extents and then was examined using different instrumental and spectral techniques that confirm the chemical structure of the photo-active product The obtained PVCN derivatives were casted in membranes that were able to cross-link when exposed to a strong UV light via 2π + 2π cycloaddition reaction, which was traced by UV–vis light spectra The textures of the obtained membranes were then observed by SEM after freeze-drying to evaluate the effect of esterification degree on the cross-linking density The PVCN membranes were also utilized as carrier support to immobilize the lactase enzyme by entrapment method and the immobilized lactase kept around 76% of its activity and presented remarkable thermal stability and resistance toward the environmental pH disturbances compared to the soluble lactase Moreover, the kinetic parameters obtained from the kinetic experiments demonstrated an observed decrease in the vmax values from 4035 to 2762 U mg 1along with an increase in the Km values from 0203 to 0432 mM upon the lactase entrapment, which implies a depressed affinity between the lactase and its substrate However, after 8 reuse cycles, the entrapped lactase still maintained around 85% of its activity revealing promising economic feasibility of the utilized entrapment technique |
- جائزة الأميرفهد بن سلطان للتفوق العلمي
- تكريم لتحكيم المشاريع البحثية لطلبة التخرج بقسم الكيمياء ضمن مسابقة أفضل ملصق علمي لعام 1446 هـ
الكلية
كلية العلوم
التخصص العام
الكيمياء
التخصص الدقيق
الكيمياء العضوية
الدرجة العلمية (المرتبة)
دكتوراه
الجنسية
السعودية
المسمى الوظيفي
استاذ