Effect of morphology and exposed facets of Ag3PO4 on photocatalytic reduction of CO2 to CH3OH over Ag/Ag3PO4 plasmonic photocatalysts

HE Zhiqiao; LIN Haiyan; CHEN Jianmeng; SONG Shuang

doi:10.11949/j.issn.0438-1157.20151104

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Effect of morphology and exposed facets of Ag₃PO₄ on photocatalytic reduction of CO₂ to CH₃OH over Ag/Ag₃PO₄ plasmonic photocatalysts

更新时间：2025-12-10

- Effect of morphology and exposed facets of Ag₃PO₄ on photocatalytic reduction of CO₂ to CH₃OH over Ag/Ag₃PO₄ plasmonic photocatalysts
- CIESC Journal Issue 12, Pages: 4850-4857(2015)
- 作者机构：
  
  浙江工业大学生物与环境工程学院,浙江,杭州,310032
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151104
  CLC： 643
- Online First：05 December 2015，
  
  Published：05 December 2015
- 稿件说明：
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HE Zhiqiao, LIN Haiyan, CHEN Jianmeng, et al. Effect of morphology and exposed facets of Ag₃PO₄ on photocatalytic reduction of CO₂ to CH₃OH over Ag/Ag₃PO₄ plasmonic photocatalysts[J]. CIESC Journal, 2015, (12): 4850-4857. DOI: 10.11949/j.issn.0438-1157.20151104.
DOI：

HE Zhiqiao, LIN Haiyan, CHEN Jianmeng, et al. Effect of morphology and exposed facets of Ag₃PO₄ on photocatalytic reduction of CO₂ to CH₃OH over Ag/Ag₃PO₄ plasmonic photocatalysts[J]. CIESC Journal, 2015, (12): 4850-4857. DOI: 10.11949/j.issn.0438-1157.20151104. DOI：

摘要

采用简单的离子交换-光还原法制备了3种表面暴露的晶面分别为单一{110}、{100}和{111}晶面的Ag/Ag3PO4等离子体光催化剂

利用X射线衍射、扫描电子显微镜、紫外-可见漫反射光谱、X射线光电子能谱和比表面积测试等技术分别对3种样品的晶相组成、微观形貌和吸光度等进行了表征。所制备催化剂用于可见光照射下光催化还原气相中的CO2生成碳氢化合物

考察了催化剂暴露的晶面与催化还原CO2活性的关系

并探讨Ag/Ag3PO4光催化还原CO2的机理。研究表明

{111}晶面暴露的四面体Ag/Ag3PO4具有最大的光催化还原CO2生成CH3OH的光量子效率、能量投入产出比和转换数。CO2可通过CO2 → ·CO2- → HCOOH → HCHO → CH3OH途径还原。

Abstract

Different morphology of Ag/Ag3PO4 plasmonic photocatalysts enclosed with single {110}

{100} and {111} facets were synthesized by a facile ion-exchang method followed by light-induced reduction. The X-ray powder diffraction

scanning electron microscopy

UV-visible absorption spectra

X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurements were employed to investigate the phase structure

micro morphology and absorbance of Ag/Ag3PO4 powders. The correlation between photocatalytic activities and exposed facet as well as the mechanism of photocatalytic reduction of CO2 under visible-light were explored. The results indicated that tetrahedral Ag/Ag3PO4 with exposed {111} facets exhibited the superior quantum yield

the ratio of the energy returned on energy invested and the turnover number. CO2 could be reduced through the process CO2 → ·CO2- → HCOOH → HCHO → CH3OH.

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