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可见光照射下具有增强光催化活性的BiPO4/Bi2S3异质结的合成

Synthesis of BiPO4/Bi2S3 Heterojunction with Enhanced Photocatalytic Activity under Visible-Light Irradiation.

作者信息

Lu Mengna, Yuan Guotao, Wang Zuoshan, Wang Yuyuan, Guo Jun

机构信息

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Soochow, 215123, China.

出版信息

Nanoscale Res Lett. 2015 Dec;10(1):385. doi: 10.1186/s11671-015-1092-z. Epub 2015 Oct 5.

DOI:10.1186/s11671-015-1092-z
PMID:26437655
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4593991/
Abstract

BiPO4/Bi2S3 photocatalysts were successfully synthesized by a simple two-step hydrothermal process, which involved the initial formation of BiPO4 rod and then the attachment of Bi2S3 through ion exchange. The as-synthesized products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra (UV-vis DRS). It was found that BiPO4 was regular rods with smooth surfaces. However, BiPO4/Bi2S3 heterojunction had a rough surface, which could be attributed to the attachment of Bi2S3 on the surface of BiPO4 rods. The BiPO4/Bi2S3 composite exhibited better photocatalytic performance than that of pure BiPO4 and Bi2S3 for the degradation of methylene blue (MB) and Rhodamine B (RhB) under visible light. The enhanced photocatalytic performance could be ascribed to synergistic effect of BiPO4/Bi2S3 heterojunction, in which the attached Bi2S3 nanoparticles could improve visible-light absorption and the BiPO4/Bi2S3 heterojunction suppressed the recombination of photogenerated electron-hole pairs. Our work suggested that BiPO4/Bi2S3 heterojunction could be a potential photocatalyst under visible light.

摘要

通过简单的两步水热法成功合成了BiPO4/Bi2S3光催化剂，该方法首先形成BiPO4棒，然后通过离子交换附着Bi2S3。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和紫外可见漫反射光谱（UV-vis DRS）对合成产物进行了表征。结果表明，BiPO4为表面光滑的规则棒状。然而，BiPO4/Bi2S3异质结表面粗糙，这可能归因于Bi2S3附着在BiPO4棒的表面。在可见光下，BiPO4/Bi2S3复合材料对亚甲基蓝（MB）和罗丹明B（RhB）的降解表现出比纯BiPO4和Bi2S3更好的光催化性能。光催化性能的增强可归因于BiPO4/Bi2S3异质结的协同效应，其中附着的Bi2S3纳米颗粒可改善可见光吸收，且BiPO4/Bi2S3异质结抑制了光生电子-空穴对的复合。我们的工作表明，BiPO4/Bi2S3异质结在可见光下可能是一种潜在的光催化剂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/3a6fecb8b744/11671_2015_1092_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/4867f7c01b2e/11671_2015_1092_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/0e12c400c290/11671_2015_1092_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/72d364123bed/11671_2015_1092_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/0a9690b112e9/11671_2015_1092_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/fa9cd97db602/11671_2015_1092_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/7558d499396e/11671_2015_1092_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/3a6fecb8b744/11671_2015_1092_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/4867f7c01b2e/11671_2015_1092_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/0e12c400c290/11671_2015_1092_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/72d364123bed/11671_2015_1092_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/0a9690b112e9/11671_2015_1092_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/fa9cd97db602/11671_2015_1092_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/7558d499396e/11671_2015_1092_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a4b3/4593991/3a6fecb8b744/11671_2015_1092_Fig7_HTML.jpg

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