Unlocking photocatalytic NO removal potential in an S-type UiO-66-NH_(2)/ZnS(en)_(0.5)heterostructure  

作　　者：Wenrui Dai Chenxiang Wang Yi Wang Jieting Sun Hang Ruan Yuhua Xue Shuning Xiao 

机构地区：[1]School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai,China

出　　处：《Interdisciplinary Materials》2024年第3期400-413,共14页交叉学科材料（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:22106105,22201180;Innovation Program of Shanghai Municipal Education Commission,Grant/Award Number:2019‐01‐07‐00‐E00015;Shanghai Scientific and Technological Innovation Project,Grant/Award Number:21DZ1206300;Central Guidance on Local Science and Technology Development Fund of Shanghai,Grant/Award Number:YDZX20213100003002;Science and Technology Commission of Shanghai Municipality,Grant/Award Number:20060502200;Program for Professor of Special Appointment,Shanghai Sailing Program,Grant/Award Number:20YF1432200。

摘　　要：The contamination of nitric oxide presents a significant environmental challenge,necessitating the development of efficient photocatalysts for remediation.Conventional heterojunctions encounter obstacles such as large contact barriers,sluggish charge transport,and compromised redox capacity.Here,we introduce an innovative S-type heterostructure photocatalyst,UiO-66-NH_(2)/ZnS(en)_(0.5),designed specifically to overcome these challenges.The synthesis,employing a unique microwave solvothermal method,strategically aligns the lowest unoccupied molecular orbital of UiO-66-NH_(2)with the highest occupied molecular orbital of ZnS(en)_(0.5),fostering the formation of a stepped heterojunction.The resulting intimate interface contact generates a built-in electric field,facilitating charge separation and migration,as evidenced by time-resolved photoluminescence spectroscopy and photoelectrochemical tests.The abundant active sites in the porous UiO-66-NH_(2)counterpart provide adsorption and activation sites for nitrogen monoxide(NO)oxidation.Performance evaluation reveals exceptional photocatalytic NO removal,achieving 70%efficiency and 99%selectivity toward nitrates under simulated solar illumination.Evidence from X-ray photoelectron spectroscopy and trapping experiments supports the effectiveness of the S-type heterostructure,showcasing refined reactive oxygen species,particularly superoxide.Thus,this study introduces a new perspective on advanced NO oxidation and unlocks the potential of S-scheme heterojunctions to refine reactive oxygen species for NO remediation.

关 键 词：HETEROJUNCTION metal-organic framework NO oxidation PHOTOCATALYSIS S-scheme 

分 类 号：O64[理学—物理化学]