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采用原位还原法制备负载型双金属位光催化剂Ag-Ni/g-C_3N4,并考察其对亚甲基蓝的可见光催化降解性能。结果表明:与Ag/g-C_3N4和Ni/g-C_3N4相比,双金属位Ag-Ni/g-C_3N4对亚甲基蓝具有更好的光催化降解活性。总负载量为4.0%时,金属Ag和Ni质量比为1:1的光催化剂Ag(2)-Ni(2)/g-C_3N4呈现出最好的催化活性,且循环使用7次后的光降解活性略微减小。其原因可能是金属Ag粒子与Ni粒子间的协同效应明显提高光生载流子在Ag-Ni粒子与g-C_3N4的界面快速传递和光生电子–空穴对有效分离。
Abstract：The supported bimetallic Ag-Ni/g-C_3N4 photocatalysts were generated by an in-situ reduction route,and the photocatalytic degradation of methylene blue under visible light illumination was investigated.The results indicate that the bimetallic Ag-Ni/g-C_3N4 sample presents a better photocatalytic activity for methylene blue,compared to Ag/g-C_3N4 and Ni/g-C_3N4 samples.At the total loading mass of metal particles of 4.0%,the photocatalyst Ag(2)-Ni(2)/g-C_3N4 sample with Ag/Ni mass ratio of 1:1 exhibits a superior degradation activity,and slightly deactivates after seven times.It can be ascribed to the synergetic effect between metallic Ag and Ni,which can greatly enhance the transfer rate of photo-induced carriers and effectively separate the photo-generated electron–hole pairs.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2018.01.12
中图分类号:O643.36
引用信息:
[1]郑小刚,杜京城,付孝锦,等.双金属位催化剂Ag-Ni/g-C_3N_4可见光催化降解亚甲基蓝[J].硅酸盐学报,2018,46(01):85-92.DOI:10.14062/j.issn.0454-5648.2018.01.12.
基金信息:
国家自然基金青年基金(21506103)项目
2017-10-11
2017-10-11
2017-10-11