材料科学
石墨烯
光电流
氧化物
纳米技术
量子点
阳极
光电子学
钙钛矿(结构)
化学工程
电极
工程类
物理化学
化学
冶金
作者
Lebao Mao,Yao Xiao,Hao Liu,Xun Zhang,Shengfu Wang,Wei‐Hua Huang,Miaomiao Chen
标识
DOI:10.1002/adfm.202213814
摘要
Abstract Perovskite quantum dots (PQDs) have attracted much attention in the field of photoelectrochemical (PEC) sensors owing to their superb optical properties and efficient charge transport, but the inherent poor stability severely hinders their PEC applications. Herein, hydrolysis‐resistant CsPbBr 3 /reduced graphene oxide nanoscrolls (CsPbBr 3 /rGO NSs) are obtained by solvent‐assisted self‐rolling process toward water‐stable PEC sensors. CsPbBr 3 QDs embedded in rGO nanosheets can be prevented from water since the multilayer rGO shell layers, which maintains excellent optical properties. On account of strong interfacial interactions, rGO nanosheets are crimped spontaneously with CsPbBr 3 QDs, which offer access to superb structural and long‐term storage stability. Moreover, appropriate band alignment and ultrafast interfacial carrier transfer enable CsPbBr 3 /rGO NSs to exhibit greatly enhanced anode photocurrent response for subsequent PEC sensing. As a demonstration, the molecular imprinted PEC sensors for two kinds of mycotoxins (aflatoxin B1 or ochratoxin A) presents an ultra‐high sensitivity and good anti‐interference ability. Significantly, this work provides an inspirable and convenient route for hydrolysis‐resistant PQDs‐based optoelectronic and photoelectrocatalytic applications in aqueous ambience.
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