Boosted photocatalytic removal of NO using direct Z-scheme UiO-66-NH_(2)/Bi_(2)MoO_(6) nanoflowers heterojunction:mechanism insight and humidity effect  

作　　者：Jiang-Yu-Shan Liang Hai-Tao Ren Abdelkader Labidi Qiu-Hui Zhu Qi-Bing Dong Ahmed A.Allam Ahmed Rady Chuan-Yi Wang 

机构地区：[1]School of Environmental Science and Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China [2]Zoology Department,Faculty of Science,Beni-Suef University,Beni-Suef 6251l,Egypt [3]Department of Zoology,College of Science,King Saud University,11451 Riyadh,Saudi Arabia

出　　处：《Rare Metals》2024年第8期3758-3770,共13页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52161145409 and 21976116);SAFEA of China("Belt and Road"Innovative Exchange Foreign Expert Project,No.DL2023041004L);Researchers Supporting Project number(No.RSPD2024R691),King Saud University,Riyadh,Saudi Arabia。

摘　　要：In practical applications,relative humidity in the air is a key factor affecting the photocatalytic removal of NO,which is often overlooked in previous studies.Here,we developed a direct Z-scheme UiO-66-NH_(2)/Bi_(2)MoO_(6)heterojunction with a nanoflower-like structure to systematically investigate the effect of relative humidity on photocatalytic removal of NO.The optimized heterojunction for the removal efficiency of NO was 71.6%at1.07 mg·m^(-3)NO concentration(relative humidity=10%),and the generation of NO_(2) was only 1.1%.Interestingly,with the increase in relative humidity,it showed a higher inhibition effect on NO_(2),while the removal of NO decreased slightly(8%),which might be attributed to the affinity effect of NO_(2) with water molecules and the competitive adsorption of H_(2)O and NO on the surface of the heterojunction photocatalysts.Furthermore,the reaction pathways of NO removal at the developed heterojunctions were revealed by in situ DRIFTS analysis.This work provides a novel vision for the development of direct Z-scheme heterojunction photocatalysts to effectively remove NO and inhibit the formation of toxic intermediate NO_(2) under different humidities.

关 键 词：NO removal Relative humidity Direct Z-scheme Bismuth molybdate Visible-light photocatalysis 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]