无机材料学报2025，Vol.40Issue(4)：397-404,8.DOI:10.15541/jim20240370
湿化学法制备Cu2O/Cu空心球异质结光催化剂
Cu2O/Cu Hollow Spherical Heterojunction Photocatalysts Prepared by Wet Chemical Approach
摘要
Abstract
As visible light photocatalysts,narrow bandgap semiconductors can effectively convert solar energy to chemical energy,exhibiting potential applications in alleviating energy shortage and environmental pollution.Cu2O/Cu hollow spherical heterojunction photocatalysts were prepared by one-pot solvothermal method without any template using CuCl2·H2O as precursor,H3NO·HCl and NaBH4 as reducing agents.Morphologies,crystal structures,composition,specific surface areas,and optical properties of the products were analyzed.Addition of NaBH4 gradually changes the morphology of Cu2O/Cu from hollow truncated octahedra to hollow nanospheres.Thickness of Cu layer on surface of Cu2O can be easily controlled by tuning amount of NaBH4.Direct reduction of Cu2O by NaBH4 leads to intimate contact between Cu2O and Cu interfaces,which is favorable for carrier separation and transport.Meanwhile,surface plasmon resonance effect of Cu promotes the absorption capability of Cu2O/Cu to visible light,thus the prepared hollow sphere Cu2O/Cu particles exhibit a higher photodegradation capability for methyl orange(MO)and colorless enrofloxacin(ENR).Catalytic performance of Cu2O/Cu is very stable,with no significant change in its photocatalytic efficiency for MO after five recycles.Free-radical removal experiments indicate that·O2-and holes were dominant species during the MO degradation.Higher photodegradation capability of Cu2O/Cu for MO is attributed to synergistic effect of Cu2O and Cu.This study provides a promising strategy for preparation of heterojunction photocatalysts.关键词
Cu2O/Cu异质结/纳米空心球/光催化/Cu层厚度Key words
Cu2O/Cu heterojunction/hollow nanosphere/photocatalysis/thickness of Cu layer分类
化学工程引用本文复制引用
贾相华,张辉霞,刘艳凤,左桂鸿..湿化学法制备Cu2O/Cu空心球异质结光催化剂[J].无机材料学报,2025,40(4):397-404,8.基金项目
黑龙江省省属高校基本科研业务费科研项目(1354MSYYB027)Fundamental Research Funds for the Provincial Universities(1354MSYYB027) （1354MSYYB027）
