TY - JOUR
T1 - 双II型SnO2@ZnS-ZnSn(OH)6异质结构建内部电场用 于高效光催化NO氧化去除
AU - Chen, Bangfu
AU - Ouyang, Ping
AU - Li, Yuhan
AU - Duan, Youyu
AU - Lv, Kangle
AU - Carabineiro, Sónia A. C.
AU - Dong, Fan
N1 - info:eu-repo/grantAgreement/FCT/CEEC INST 2018/CEECINST%2F00102%2F2018%2FCP1567%2FCT0001/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT#
Funding Information:
This work was financially supported by the National Natural Science Foundation of China (51808080), China Postdoctoral Science Foundation (2022M710830), the Venture and Innovation Support Program for Chongqing Overseas Returnees (cx2022005), the Natural Science Foundation Project of CQ CSTC (CSTB2022NSCQ-MSX1267), the Science and Technology Research Program of Chongqing Municipal Education Commission of China (KJQN201800826 & KJZD-K202100801), the Post-doctoral Program Funded by Chongqing, Chongqing University Innovation Research Group project (CXQT21023).
Publisher Copyright:
© 2023, Science China Press.
PY - 2023/4
Y1 - 2023/4
N2 - Well-designed heterojunction photocatalysts are promising high-performance materials, effective in inducing charge transfer to achieve a particular migration path and long-lasting carriers. However, the traditional binary heterojunction photocatalysts still show low-efficiency charge separation. Herein, we report a direct dual-type-II SnO2@ZnS-ZHS (ZHS = ZnSn(OH)6) ternary heterojunction, obtained by a facile in-situ face-to-face growth approach. Experimental results and density functional theory calculations reveal that the carrier dynamics of SnO2@ZnS-ZHS, with dual-type-II mechanisms, enables the photogenerated holes (h+) of SnO2 to migrate to the valence bands of ZHS and ZnS. This ensures that SnO2@ZnS-ZHS has twice as much oxidizing potential to produce enough hydroxyl radicals (·OH) to participate in NO oxidation reactions. With a unique dual-type-II ternary structure, SnO2@ZnS-ZHS shows the highest NO removal rate (44.5%) after 30 min, which is 23.5, 29.7 and 15.9 times higher than the values shown by the single components ZHS, SnO2 and ZnS, respectively. A reaction mechanism is proposed. The improved photocatalytic activity shows the advantages of the SnO2@ZnS-ZHS heterostructure as a promising candidate for ternary heterojunction design. [Figure not available: see fulltext.].
AB - Well-designed heterojunction photocatalysts are promising high-performance materials, effective in inducing charge transfer to achieve a particular migration path and long-lasting carriers. However, the traditional binary heterojunction photocatalysts still show low-efficiency charge separation. Herein, we report a direct dual-type-II SnO2@ZnS-ZHS (ZHS = ZnSn(OH)6) ternary heterojunction, obtained by a facile in-situ face-to-face growth approach. Experimental results and density functional theory calculations reveal that the carrier dynamics of SnO2@ZnS-ZHS, with dual-type-II mechanisms, enables the photogenerated holes (h+) of SnO2 to migrate to the valence bands of ZHS and ZnS. This ensures that SnO2@ZnS-ZHS has twice as much oxidizing potential to produce enough hydroxyl radicals (·OH) to participate in NO oxidation reactions. With a unique dual-type-II ternary structure, SnO2@ZnS-ZHS shows the highest NO removal rate (44.5%) after 30 min, which is 23.5, 29.7 and 15.9 times higher than the values shown by the single components ZHS, SnO2 and ZnS, respectively. A reaction mechanism is proposed. The improved photocatalytic activity shows the advantages of the SnO2@ZnS-ZHS heterostructure as a promising candidate for ternary heterojunction design. [Figure not available: see fulltext.].
KW - internal electric field
KW - NO removal
KW - ternary heterojunction
KW - ZnSn(OH)
UR - http://www.scopus.com/inward/record.url?scp=85145096728&partnerID=8YFLogxK
U2 - 10.1007/s40843-022-2288-0
DO - 10.1007/s40843-022-2288-0
M3 - Article
AN - SCOPUS:85145096728
SN - 2095-8226
VL - 66
SP - 1447
EP - 1459
JO - SCIENCE CHINA Materials
JF - SCIENCE CHINA Materials
IS - 4
ER -