Journal of Photochemistry and Photobiology A: Chemistry, 2021
Abstract Clay minerals have been proven as much attractive support materials for catalytic applic... more Abstract Clay minerals have been proven as much attractive support materials for catalytic applications owing to its non-toxicity, low-cost, efficient surface area, ion exchange capacity and flat sheets. Laponite D is a layered silicate disc-type clay, which can provide efficient photocatalytic activity under visible light radiation due to its catalytic active surfaces and zwitterionic property. Herein, the photocatalytic studies based on the incorporation of MoSx onto Laponite D clay structure were carried out for the first time. Time dependent photocatalytic reactions were performed by using Laponite D, triethanolamine and eosin-Y dye as catalytically active surface, sacrificial electron donor and photosensitizer, respectively, in the absence and presence of ammonium tetrathiomolybdate as the precursor of in situ photodeposited MoSx co-catalyst. Laponite D/MoSx exhibited higher photocatalytic activity and stability than that of free-Laponite D and free-MoSx. Laponite D/MoSx enhanced the photocatalytic activity approximately 7- and 2-times compared to the free- Laponite D and free-MoSx, respectively. In addition, solar-to-hydrogen (STH) efficiencies are reached about 26% under solar irradiation for the Laponite D/MoSx in the presence of aqueous eosin-Y and triethanolamine media. Moreover, photocatalytic activities of eosin-Y sensitized Laponite D, free-MoSx and Laponite D/MoSx were compared to different xanthene type sensitizers.
The acylation reaction of polystyrene with organic anhydrides, such as maleic and ace-tic anhydri... more The acylation reaction of polystyrene with organic anhydrides, such as maleic and ace-tic anhydrides were investigated in the presence of cationic catalysis (AlCl3, BF3·O(C2H5)2, FeCl3, SnCl4, TiCl4, ZnCl2), to synthesise some polyfunctional (carbonyl-, carboxyl-, keto-, olefinic) polystyrene. The incorporation of functional groups to polystyrene were caused an increase of adhesion capability, physico-mechanical properties, elasticity and photosensitivity polyfunctional product.
Chirality is a major field of research of chemical biology and is essential in pharmacology. Acco... more Chirality is a major field of research of chemical biology and is essential in pharmacology. Accordingly, approaches for distinguishing between different chiral forms of a compound are of great interest. We report on an efficient and generic enantioselective sensor that is achieved by coupling reduced graphene oxide with γ-cyclodextrin (rGO/γ-CD). The enantioselective sensing capability of the resulting structure was operated in both electrical and optical mode for of tryptophan enantiomers (D-/L-Trp). In this sense, voltammetric and photoluminescence measurements were conducted and the experimental results were compared to molecular docking method. We gain insight into the occurring recognition mechanism with selectivity toward D- and L-Trp as shown in voltammetric, photoluminescence and molecular docking responses. As an enantioselective solid phase on an electrochemical transducer, thanks to the different dimensional interaction of enantiomers with hybrid material, a discrepancy ...
New photocatalytic systems for H2 evolution have been reported by using Cu2ZnSnS4, Cu2ZnSnSe4, an... more New photocatalytic systems for H2 evolution have been reported by using Cu2ZnSnS4, Cu2ZnSnSe4, and Cu2ZnSnSe4−xSx nanofiber catalysts under visible light irradiation.
Bu calismada schiff bazi turevi olan izonitroasetofenon 4-aminobenzohidrazonun silika yuzeyine, 3... more Bu calismada schiff bazi turevi olan izonitroasetofenon 4-aminobenzohidrazonun silika yuzeyine, 3- kloropropiltrimetoksisilan bilesigi vasitasi ile immobilizasyonu calisilmistir. Immobilizasyon asamasinda silika jel aktiflestirilerek, 3- kloropropiltrimetoksisilan bilesigi ile silanlastirilmis, klor grubu uzerinden schiff bazinin baglanmasi gerceklestirilmistir, immobilizasyon reaksiyonlari infrared spektroskopisi ve elementel analiz ile karakterize edilmistir. Sentezlenmis olan yeni adsorban icin Cu(ll) metal iyonlarinin adsorpsiyonu calisilmistir bakir iyonunun adsorpsiyonuna, adsorban miktari, adsorpsiyon suresi, pH, metal iyon konsantrasyonu ve sicaklik etkileri arastirilmistir.
Journal of Photochemistry and Photobiology A: Chemistry, 2021
Abstract Clay minerals have been proven as much attractive support materials for catalytic applic... more Abstract Clay minerals have been proven as much attractive support materials for catalytic applications owing to its non-toxicity, low-cost, efficient surface area, ion exchange capacity and flat sheets. Laponite D is a layered silicate disc-type clay, which can provide efficient photocatalytic activity under visible light radiation due to its catalytic active surfaces and zwitterionic property. Herein, the photocatalytic studies based on the incorporation of MoSx onto Laponite D clay structure were carried out for the first time. Time dependent photocatalytic reactions were performed by using Laponite D, triethanolamine and eosin-Y dye as catalytically active surface, sacrificial electron donor and photosensitizer, respectively, in the absence and presence of ammonium tetrathiomolybdate as the precursor of in situ photodeposited MoSx co-catalyst. Laponite D/MoSx exhibited higher photocatalytic activity and stability than that of free-Laponite D and free-MoSx. Laponite D/MoSx enhanced the photocatalytic activity approximately 7- and 2-times compared to the free- Laponite D and free-MoSx, respectively. In addition, solar-to-hydrogen (STH) efficiencies are reached about 26% under solar irradiation for the Laponite D/MoSx in the presence of aqueous eosin-Y and triethanolamine media. Moreover, photocatalytic activities of eosin-Y sensitized Laponite D, free-MoSx and Laponite D/MoSx were compared to different xanthene type sensitizers.
The acylation reaction of polystyrene with organic anhydrides, such as maleic and ace-tic anhydri... more The acylation reaction of polystyrene with organic anhydrides, such as maleic and ace-tic anhydrides were investigated in the presence of cationic catalysis (AlCl3, BF3·O(C2H5)2, FeCl3, SnCl4, TiCl4, ZnCl2), to synthesise some polyfunctional (carbonyl-, carboxyl-, keto-, olefinic) polystyrene. The incorporation of functional groups to polystyrene were caused an increase of adhesion capability, physico-mechanical properties, elasticity and photosensitivity polyfunctional product.
Chirality is a major field of research of chemical biology and is essential in pharmacology. Acco... more Chirality is a major field of research of chemical biology and is essential in pharmacology. Accordingly, approaches for distinguishing between different chiral forms of a compound are of great interest. We report on an efficient and generic enantioselective sensor that is achieved by coupling reduced graphene oxide with γ-cyclodextrin (rGO/γ-CD). The enantioselective sensing capability of the resulting structure was operated in both electrical and optical mode for of tryptophan enantiomers (D-/L-Trp). In this sense, voltammetric and photoluminescence measurements were conducted and the experimental results were compared to molecular docking method. We gain insight into the occurring recognition mechanism with selectivity toward D- and L-Trp as shown in voltammetric, photoluminescence and molecular docking responses. As an enantioselective solid phase on an electrochemical transducer, thanks to the different dimensional interaction of enantiomers with hybrid material, a discrepancy ...
New photocatalytic systems for H2 evolution have been reported by using Cu2ZnSnS4, Cu2ZnSnSe4, an... more New photocatalytic systems for H2 evolution have been reported by using Cu2ZnSnS4, Cu2ZnSnSe4, and Cu2ZnSnSe4−xSx nanofiber catalysts under visible light irradiation.
Bu calismada schiff bazi turevi olan izonitroasetofenon 4-aminobenzohidrazonun silika yuzeyine, 3... more Bu calismada schiff bazi turevi olan izonitroasetofenon 4-aminobenzohidrazonun silika yuzeyine, 3- kloropropiltrimetoksisilan bilesigi vasitasi ile immobilizasyonu calisilmistir. Immobilizasyon asamasinda silika jel aktiflestirilerek, 3- kloropropiltrimetoksisilan bilesigi ile silanlastirilmis, klor grubu uzerinden schiff bazinin baglanmasi gerceklestirilmistir, immobilizasyon reaksiyonlari infrared spektroskopisi ve elementel analiz ile karakterize edilmistir. Sentezlenmis olan yeni adsorban icin Cu(ll) metal iyonlarinin adsorpsiyonu calisilmistir bakir iyonunun adsorpsiyonuna, adsorban miktari, adsorpsiyon suresi, pH, metal iyon konsantrasyonu ve sicaklik etkileri arastirilmistir.
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