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材料导报  2019, Vol. 33 Issue (24): 4046-4050    https://doi.org/10.11896/cldb.18110194
  无机非金属及其复合材料 |
助催化剂NiCoP修饰改性增强半导体TiO2的光催化性能
林思宇, 曾春梅
西华师范大学化学化工学院,化学合成与污染控制四川省重点实验室,南充 637000
Enhanced Photocatalytic Property of TiO2 Semiconductor by Modification of Cocatalyst NiCoP
LIN Siyu, ZENG Chunmei
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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摘要 为了增强半导体TiO2的光催化性能,采用相对简便的磷酸盐还原法制备了双金属磷化物NiCoP,并且首次将NiCoP作为助催化剂对半导体光催化剂TiO2进行修饰改性。以罗丹明B(RhB)染料溶液为污染物模型,对NiCoP/TiO2复合材料的光催化活性进行测试。实验结果表明,与纯TiO2和纯NiCoP相比,适量的NiCoP修饰使TiO2催化剂的光催化降解性能明显增强;其中,NiCoP的负载量为0.25%时,NiCoP/TiO2复合材料光催化活性最高,对RhB的降解效果最佳。电化学测试表明,复合材料活性增强的主要原因是NiCoP与TiO2发生相互作用,促进了光生电荷的分离,提高了其迁移效率。紫外-可见漫反射光谱证实,NiCoP负载后使得半导体催化剂的光谱响应范围稍有拓宽。同时,自由基捕获实验证明·OH、·O2-为该降解反应的主要活性物种。
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林思宇
曾春梅
关键词:  光催化  二氧化钛  双金属磷化物  NiCoP  复合材料  罗丹明B    
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.
Key words:  photocatalysis    titanium dioxide    bimetal phosphides    NiCoP    composite    rhodamine B
               出版日期:  2019-12-25      发布日期:  2019-10-28
ZTFLH:  O643  
基金资助: 四川省教育厅重点项目(16ZA0176);四川省大学生创新项目(201610638097)
作者简介:  林思宇,现于西华师范大学化学化工学院攻读硕士学位。主要研究方向为半导体光催化分解水制氢及光催化降解污染物;曾春梅,西华师范大学硕士研究生导师。2015年6月于重庆大学获得博士学位,同年加入西华师范大学化学化工学院工作至今。主要研究兴趣为半导体光催化分解水及光催化降解污染物。
引用本文:    
林思宇, 曾春梅. 助催化剂NiCoP修饰改性增强半导体TiO2的光催化性能[J]. 材料导报, 2019, 33(24): 4046-4050.
LIN Siyu, ZENG Chunmei. Enhanced Photocatalytic Property of TiO2 Semiconductor by Modification of Cocatalyst NiCoP. Materials Reports, 2019, 33(24): 4046-4050.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.18110194  或          http://www.mater-rep.com/CN/Y2019/V33/I24/4046
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