材料科学
分解水
吸附
面(心理学)
纳米技术
二氧化钛
化学工程
光催化
化学物理
化学
催化作用
物理化学
复合材料
五大性格特征
工程类
社会心理学
人格
生物化学
心理学
作者
Chaiyasit Phawa,Sanchai Prayoonpokarach,Kitiphat Sinthiptharakoon,Pongkarn Chakthranont,Weradesh Sangkhun,Kajornsak Faungnawakij,Teera Butburee
出处
期刊:Chemcatchem
[Wiley]
日期:2020-01-24
卷期号:12 (7): 2116-2124
被引量:21
标识
DOI:10.1002/cctc.201901857
摘要
Abstract Engineering crystal facets have been proved as one of the most promising strategies for promoting photocatalytic performance of titanium dioxide (TiO 2 ). The earlier research in this field focused on trying to obtain as high ratio of the high energy {001} facet as possible, while later found that the co‐existence of facets is more beneficial. However, controlling crystals to expose suitable facet pairs and facet ratios remains challenging. In this work, we not only comprehensively match possible low‐index facets such as {101}‐{001} and {010}‐{001} facet pairs, but also systematically tune their ratios. Moreover, these faceted particles can be directly grown onto the transparent conductive substrate, which can be directly used as a photoanode. So, their intrinsic behaviors can be precisely evaluated without interference from other exogenous factors such as binders, additives, or assembly skills. Various characterization techniques reveal that both the types of facet pairs and the ratios of facets play crucial roles on photocatalytic behaviors, due to the different electron affinity and dissociative adsorption ability of water molecules on a particular facet. Charge transport and surface chemistry have been thoroughly investigated to identify the underlying mechanism. This work sheds light on a material design strategy considering a suitable match of facet pairs for optimizing photocatalytic performance for a wide variety of applications.
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