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Acetic Acid Assisted to Prepare Bi 2MoO 6 with Visible-Light-Induced Activity
Xiangchao Meng, Zisheng Zhang
General Chemistry    2017, 3 (3): 159-163.   DOI: 10.21127/yaoyigc20170008
Abstract563)   HTML66)    PDF (995KB)(523)       Save

Photocatalysis has been extensively studied and developed. To overcome the visible-light irresponsive hindrance, developing novel materials has become a significant promise. Bismuth-based semiconductors were promising candidates with suitable band gaps, and various bismuth-based semiconductors can be prepared via facile methods. Herein, we report a modified hydrothermal method assisted by adding acetic acid in the precursor to prepare Bi2MoO6 with enhanced photocatalytic activity in the degradation of RhB under visible light irradiation. This work provides a new approach to improve photocatalytic activity via adding chemicals in the precursors during the preparation.

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Enhanced Adsorption and Photocatalysis by Introduction of C into N, Zr/TiO 2
Haijin Liu, Peiyao Li, Haokun Bai, Cuiwei Du, Yuzhao Su, Dandan Wei, Yuqian Wang
General Chemistry    2018, 4 (2): 180008-180008.   DOI: 10.21127/yaoyigc20180008
Abstract526)   HTML44)    PDF (488KB)(665)       Save
The introduction of carbon (C) into TiO 2 may facilitate charge transfer and thus improve its photocatalytic activities. In this paper, C was introduced into N, Zr/TiO 2 via ultrasound and calcination using glucose as carbon precursor. The as-prepared C@N, Zr/TiO 2 was characterized by SEM, TEM, XRD, UV-Vis DRS, and XPS. The adsorption abilities of the materials were evaluated using two anion dyes [methylene blue (MB) and basic violet (BV)] and two cation dyes [titan yellow (TY) and congo red (CR)] as model pollutants. The photocatalytic activities were investigated through the degradation of Ciprofloxacin (CIP) under simulated sunlight irradiation. The results revealed that the appropriate introduction of carbon may improve the adsorption abilities and the photocatalytic activities of non-carbonaceous materials. Furthermore, several samples exhibited selective adsorption abilities for cation dyes, which suggested the potential application of the as-prepared materials for the selective removal of co-existing pollutants.
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Photocatalytic Reduction of N 2 for Ammonia Production
Xiangchao Meng, Zisheng Zhang
General Chemistry    2019, 5 (3): 190006-190006.   DOI: 10.21127/yaoyigc20190006
Abstract470)      PDF (141KB)(505)       Save
Photocatalytic fixation of dinitrogen has become a research hotspot in recent years. Compared with traditional processes for the production of ammonia, photocatalysis exhibited superiorities, such as easy-to-operate, mild operating conditions and low cost. However, the production rate of ammonia from photocatalytic reduction of N 2 is pretty low. Also, the selectivity of ammonia is very low as regards the influence of water splitting. Lots of works have been reported with the presence of these hindrances. This is a challenge as well as an opportunity for global researchers. With this perspective in view, a recommendation for future work was included.
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Photocatalytic Degradation of Antibiotics and Dyes in Wastewater by Hydrogenated Black Titanium Dioxide Nanoparticles Using Design of Experiment L9 Taguchi Orthogonal Array
Alma L. Valenzuela, Michael Green, and Xiaobo Chen
General Chemistry    2021, 7 (4): 210006-210006.   DOI: 10.21127/yaoyigc20210006
Abstract491)      PDF (1649KB)(290)       Save
Aqueous pollution from industrial dyes and antibiotics has brought up much threat to our daily healthy life. In the present work, hydrogenated black TiO 2 nanoparticles (H-TiO 2) are synthetized, their properties are studied, and their potentials in removing dyes (methylene blue, M.B.) and antibiotics such as tetracycline hydrochloride (TC) and ciprofloxacin (CIP) are explored with the support of statistical optimization. The operational controlled parameters such as catalyst amount (g L −1), pH and irradiation time (min) were optimized using Design of Experiment (DOE) L9 Taguchi Orthogonal Array. From Analysis of Variance (ANOVA) results, it can be seen that irradiation time is the most influencing parameter for % MB color removal, % Degradation of TC and CIP, over catalyst amount and pH. The optimal parameters found here are 0.50 g L −1 of hydrogenated H-TiO 2-750 as catalyst, pH 4 for MB, pH 11 for TC and pH 2 for CIP, respectively. In addition, an irradiation time of 30 min shows a maximum MB color removal of 95.05%, TC 94.8% and CIP 92.25%. Irradiation time is found to be the most influencing parameter (71.08% for MB, 55.33% for TC and 52.77% for CIP) followed by catalyst amount (28.82% for MB, 44.19% for TC and 41.5% for CIP) and in the end pH (0.09% for MB, 0.47% for TC and 5.72% for CIP). With the use of hydrogenated H-TiO 2-750, the dye and antibiotics degradation reaches almost 40% more than using TiO 2 pristine anatase.
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