片状铋/钒酸铋复合催化剂的制备及其光催化性能

doi:10.11962/1006-4990.2020-0064

摘要/Abstract

摘要：

用溶剂热法合成了一系列不同铋含量的片状铋/钒酸铋（Bi/BiVO₄）复合光催化剂。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、紫外-可见漫反射光谱（UV-vis DRS）、电感耦合等离子发射光谱（ICP-OES）、氮气吸附脱附和光电流响应等技术对所制备的催化剂进行了表征。通过氙灯下光催化降解亚甲基蓝的性能来评价样品的光催化活性,实验结果表明铋的自掺杂能显著提高钒酸铋的光催化活性。最后,通过自由基捕获实验对铋/钒酸铋光催化机理进行了探讨。

关键词: 钒酸铋, 复合半导体, 光催化, 染料降解

Abstract:

A series of sheet-like Bi/BiVO₄ composite photocatalysts with different Bi contents were synthesized using solvo-thermal method.The prepared catalysts were characterized by using X-ray diffraction（XRD）,X-ray photoelectron spectro-scopy（XPS）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,ultraviolet-visible diffuse reflec-tion spectroscopy（UV-Vis DRS）,inductively coupled plasma optical emission spectroscopy（ICP-OES）,nitrogen adsorp-tion-desorption analysis and photocurrent response measurements.The photocatalytic performance of the sample was assessed by photodecomposition of methylene blue（MB） under xenon lamp irradiation.The results showed that the photocatalytic ac-tivity of BiVO₄ was enhanced significantly with Bi self-doping.Finally,the photocatalytic reaction mechanism of Bi/BiVO₄ composite was discussed by free radical capture experiments.

Key words: bismuth vanadate, composite semiconductor, photocatalysis, dye degradation

中图分类号:

O643.36

冯飞,李书文,汪铁林,王为国,王存文. 片状铋/钒酸铋复合催化剂的制备及其光催化性能[J]. 无机盐工业, 2021, 53(1): 107-112.

Feng Fei,Li Shuwen,Wang Tielin,Wang Weiguo,Wang Cunwen. Synthesis and photocatalytic performance of sheet-like Bi/BiVO₄ composite catalyst[J]. Inorganic Chemicals Industry, 2021, 53(1): 107-112.

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催化剂	比表面积/ （m²·g^-1）	孔容/ （cm³·g^-1）	孔径/ nm	n（Bi）/n（V）
BiVO₄	13.708 0	0.082 696	24.144 32	1.21
2-BiVO₄	13.731 1	0.079 239	22.263 1	—
3-BiVO₄	13.782 2	0.073 714	21.406 57	—
4-BiVO₄	9.872 8	0.049 779	20.196 73	1.37

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