文献类型：期刊文献

英文题名：Construction and excellent photoelectric synergistic anticorrosion performance of Z-scheme carbon nitride/tungsten oxide heterojunctions

作者：Ge, Yunxiao[1];Guo, Xiaojiao[1];Zhou, Dan[1];Liu, Jinku[1]

机构：[1]East China Univ Sci & Technol ECUST, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2022

卷号：14

期号：34

起止页码：12358

外文期刊名：NANOSCALE

收录：;EI(收录号：20223612689401);WOS:【SCI-EXPANDED(收录号:WOS:000840926400001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant 21878090) and the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province (Grant 2020CL04).

语种：英文

外文关键词：Carbon nitride - Chlorine compounds - Corrosion resistant coatings - Epoxy resins - Oxides - Tungsten compounds

摘要：The use of heterojunctions for metal corrosion protection is a highly innovative and challenging task. Based on the composition and structure of tungsten oxide-based heterojunctions, Z-scheme heterojunctions were designed and synthesized by the electrostatic self-assembly method using energy band-matched g-C3N4 and WO3 materials. Applied in the field of anticorrosion, they overcame the problems of poor reduction ability and transmission inefficiency of traditional materials. The Z-scheme heterojunctions ensured unidirectional electron transfer, while the aggregation of the retained strongly reduced electrons on the surface of the iron substrates provided a strong driving force for retarding corrosion occurrence. Meanwhile, the inherent shielding properties of the two-dimensional material g-C3N4 and the confinement of chloride ions as an electroactive layer hindered the penetration of the corrosive solution. After being corroded for 72 h, the corrosion impedance of the g-C3N4/WO3 heterojunction system was improved by 640.11% compared with the epoxy resin coating. In addition, the g-C3N4/W18O49 heterojunction was synthesized by using mixed valence tungsten oxide, which overcame the problems of photogenerated electron yield and lifetime, and enhanced the anticorrosion performance compared with a single g-C3N4 phase. This research provided ideas for designing efficient and environmentally friendly heterojunction anticorrosion materials.