| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Enhanced Photocatalytic Property of TiO2 Semiconductor by Modification of Cocatalyst NiCoP |
| LIN Siyu, ZENG Chunmei
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| Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province,College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637000 |
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Abstract AAiming at enhancing the photocatalytic property of TiO2, we synthesized the bimetal phosphide NiCoP by a relatively simple approach of phosphate reduction, and utilized the well dispersed NiCoP as cocatalyst to modify the photocatalyst TiO2 for the first time. Then, the mea-surement of photocatalytic activity of NiCoP/TiO2 composites were conducted, taking rhodamine B (RhB) dye solution as a contaminant model. It could be found from the results that there was an obvious enhancement in photocatalytic degradation performance of NiCoP/TiO2 composites after loading proper amount of NiCoP, compared with either pure TiO2 or pure NiCoP. The NiCoP/TiO2 composite with NiCoP loading amount of 0.25% exhibited the highest photocatalytic activity and optimal degradation effect to RhB. Electrochemical test demonstrated that the reason for the improved photocatalytic activity of NiCoP/TiO2 composites lay in the interaction of loaded NiCoP with host catalyst TiO2, promoting the separation and migration of photogenerated charge. The results of UV-vis diffuse reflectance spectra confirmed that after loading phosphides the slightly broadened spectrum response range of TiO2 were derived from the loading of NiCoP. In addition, the free radical capture experiment proved ·OH and·O2- as the main active species in the degradation reaction.
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Published: 28 October 2019
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| Fund:This work was financially supported by the Key Program of Sichuan Provincial Department of Education (16ZA0176) and College Students’ Innovative Project of Sichuan Province(201610638097) |
| About author:: Siyu Lin studying for a master’s degree in the China West Normal University. Her research interests is modification of g-C3N4 and study on its photocatalytic pro-perties;Chunmei Zeng received her Ph.D. degree in Chongqing University in 2015. She is currently a gra-duate teacher in China West Normal University. Her research interests are water splitting and degradation of pollutants photocatalyzed by semiconductor. |
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2019, Vol. 33 
