Co-BiVO4异质结光催化剂的制备及其性能

doi:10.16085/j.issn.1000-6613.2017-0407

化工进展 ›› 2017, Vol. 36 ›› Issue (11): 4080-4086.DOI: 10.16085/j.issn.1000-6613.2017-0407

Co-BiVO₄异质结光催化剂的制备及其性能

黄文迪¹, 孙静², 申婷婷², 王西奎¹

1. 齐鲁工业大学化学与制药工程学院, 山东济南 250353;
2. 齐鲁工业大学环境科学与工程学院, 山东济南 250353

收稿日期:2017-03-14 修回日期:2017-06-11 出版日期:2017-11-05 发布日期:2017-11-05
通讯作者: 王西奎,教授,从事环境污染控制化学研究及环境材料的制备与评价。
作者简介:黄文迪(1988-),男,硕士研究生,研究方向为环境污染物控制化学与工艺。E-mail:hwdcom@163.com。
基金资助:
国家自然科学基金项目（21507067）。

Preparation and properties of Co-doped BiVO₄ heterojunction photocatalysts fabricated by hydrothermal method

HUANG Wendi¹, SUN Jing², SHEN Tingting², WANG Xikui¹

1. College of Chemical and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, China;
2. College of Environmental Science and Engineering, Qilu University of Technology, Jinan 250353, Shandong, China

Received:2017-03-14 Revised:2017-06-11 Online:2017-11-05 Published:2017-11-05

摘要/Abstract

摘要： 采用一步水热法合成具有高效光催化活性的Co-BiVO₄纳米复合材料。该材料通过Co氧化物包覆在钒酸铋表面构成p-n型异质结结构。通过X射线衍射仪（XRD）、扫描电子显微镜（SEM）、高倍透射电镜（HRTEM）、X射线光电子能谱（XPS）、紫外可见漫反射（UV-vis DRS）等对所制备的纳米光催化剂进行形貌、结构、组成及光电性能表征分析。发现Co是以氧化物的形式负载在BiVO₄的表面，并且复合材料的可见光吸收带发生了红移。利用亚甲基蓝（MB）作为目标污染物，以可见光作为光源考察不同材料的光催化性能。结果表明，Co-BiVO₄复合光催化剂的催化活性明显高于纯BiVO₄。当Bi和Co的复合比为2：1时，Co-BiVO₄的光催化活性最高，与纯BiVO₄相比光催化反应速率提高了4倍。本研究完善了铋系异质结和过渡金属提高光催化活性的相关机理。

关键词: 催化剂, 钴-钒酸铋, 异质结, 水热, 降解

Abstract: A unique Co-BiVO₄ photocatalyst with heterostructure was synthesized via a simple one-step hydrothermal method. The material forms a p-n-type heterojunction structure by coating cobalt oxide on the surface of BiVO₄. The morphology, structure, composition and optical property of the as-prepared nanocomposites were characterized by XRD, SEM, HRTEM, XPS, and UV-vis DRS. Characterization analysis showed that cobalt loaded on the surface of BiVO₄ as oxide and the catalyst showed a significant red-shift in the absorption band in the visible region. The photocatalytic activities of the samples were examined by studying the degradation of methylene blue (MB) under visible-light irradiation. The results showed that the photocatalytic activity of Co-BiVO₄ was increased by 4 times, compared with pure BiVO₄ under visible light irradiation. The best photocatalytic activity was achieved when the molar ratio of Bi:Co was 1:2. The improving mechanisms of bismuth heterojunction and transition metal were further elucidating in the work.

Key words: catalyst, Co-BiVO₄, heterojunction, hydrothermal, degradation

中图分类号:

O643.36

黄文迪, 孙静, 申婷婷, 王西奎. Co-BiVO₄异质结光催化剂的制备及其性能[J]. 化工进展, 2017, 36(11): 4080-4086.

HUANG Wendi, SUN Jing, SHEN Tingting, WANG Xikui. Preparation and properties of Co-doped BiVO₄ heterojunction photocatalysts fabricated by hydrothermal method[J]. Chemical Industry and Engineering Progress, 2017, 36(11): 4080-4086.

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Co-BiVO₄异质结光催化剂的制备及其性能

Preparation and properties of Co-doped BiVO₄ heterojunction photocatalysts fabricated by hydrothermal method

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