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( Abdelrahman Rabie ),( A. M. Elfadly ),( M. A. Betiha ),박상언 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
The ODH of ethylbenzene to styrene was investigated over different loadings of V2O5 (5-30 wt.%) supported on HMS embedded with Zr. The all prepared materials were tested for their performance with environmentally friendly carbon dioxide as soft oxidant. All the prepared catalysts were treated by hydrothermal and microwave methods. The catalysts were characterized by XRD, IR, TPD, BET and TEM. With comparing the different loadings of the catalysts we found that the most active loading is 20% of V2O5/ZrO2-HMS microwave treated (V/ZHMSMW3). The catalyst V/ZHMS-MW3 exhibited higher activity among the all prepared catalysts. Maximum conversion of ethylbenzne 82.44, yield 82.19 and selectivity 99.75 for styrene were obtained by V/ZHMS-MW3.
Bo Gyeong Mun,Salh Alhammadi,Abdelrahman M Rabie,Mostafa Saad Sayed,Jae-Jin Shim,Woo Kyoung Kim 한국에너지학회 2021 한국에너지공학회 학술발표회 Vol.2021 No.4
In this work, we studied Ag doping effect on In<snb>2</sub>S<sub>3</sub> nanoparticles properties and on corresponding photocatalytic applications. The In<snb>2</sub>S<sub>3</sub> deposition was carried out using cost-effective simple chemical solution method. The XRD results showed that’s all the prepared nanoparticles have a polycrystalline cubic crystal structure with a (111)-plan preferred orientation. Also, The XRD results showed that’s all the prepared nanoparticles have a polycrystalline cubic crystal structure with a (111)-plan preferred orientation. The XRD results indicates Ag doping didn’t affect the In<snb>2</sub>S<sub>3</sub> crystal structure due to the absence of foreign phases. Further, the Ag-doped In<snb>2</sub>S<sub>3</sub> XRD peaks were shifting to lower 2θ indicating the success incorporation of Ag inside the In<snb>2</sub>S<sub>3</sub> lattice. The chemical bonding states and composition of the prepared nanoparticles were confirmed from XPS results, which the results showed all the samples has identical structure of In<snb>2</sub>S<sub>3</sub>. The photocatalytic ability of the pure In<snb>2</sub>S<sub>3</sub> and Ag-doped In<snb>2</sub>S<sub>3</sub> nanoparticles were investigated systematically and compared for the decomposition of methylene blue dye (MB), rhodamine b (Rhb) and tetracycline (TC) under visible light illumination. Overall, the Ag-doped In<snb>2</sub>S<sub>3</sub> exhibited better performance than pure In<snb>2</sub>S<sub>3</sub> of visible-light photocatalytic degradation of TC and MB with higher removal efficiency. In addition, the production of hydrogen via water splitting process was investigated and showed the Ag-doped In<snb>2</sub>S<sub>3</sub> samples have higher performance than pure In<snb>2</sub>S<sub>3</sub>.
Manjiri A. Mahadadalkar,Ganesh Dhakal,Sumanta Sahoo,Deivasigamani Ranjith Kumar,Marjorie Lara Baynosa,Van Quang Nguyen,Mostafa Saad Sayed,Abdelrahman M. Rabie,Woo Kyoung Kim,Jae-Jin Shim 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
Heterojunction TiO2/In2S3 composite photocatalyst was prepared using a simple low-temperature onestephydrothermal method. In2S3 nanosheets with a thickness of 1–5 nm were decorated with 20–30 nm TiO2 nanoparticles, forming a stable heterojunction. The electron transfer mechanism and bandalignment between TiO2 and In2S3 was studied using X-ray photoelectron spectroscopy and UV–visiblespectroscopy, which suggested the formation of an S-scheme heterojunction in TiO2/In2S3 composite. The TiO2/In2S3 composite with a 1:1 mole ratio showed 99.9% photocatalytic degradation ofRhodamine B within 20 minutes of solar light irradiation, which was better than the results for pristineTiO2, pristine In2S3, and their physical mixture, as well as any other previously reported materials of thesame kind. The as-prepared TiO2/In2S3 composite showed excellent stability (98% for Rhodamine B) evenafter five successive reuse cycles. This excellent performance of TiO2/In2S3 was attributed to the S-schemeheterojunction because of an internal electric field, columbic attraction, and band bending. A radical trappingstudy showed that superoxide radicals O2 contribute the most to the photocatalytic degradationof Rhodamine B followed by hydroxyl radicals (OH) and holes (hVB+ ). The use of a low synthesis temperatureand a simple, one-step formation method, with no secondary pollutants generated, makes this processan environmentally friendly and sustainable solution for cost-effective wastewater treatment,highlighting its future commercial applications.