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TiO2 Photonic Crystals with Localized Surface Photothermal Effect and Enhanced Photocatalytic CO2 Reduction Activity
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-10-02 00:00:00 , DOI: 10.1021/acssuschemeng.8b04150
Jingxiang Low 1 , Liuyang Zhang 1 , Bicheng Zhu 1 , Zhengyou Liu 2 , Jiaguo Yu 1
Affiliation  

Photothermal effect through absorbing infrared light is an important strategy for various living beings to regulate their body temperature. Although utilization of this effect in modern human technologies such as photoconversion and catalysis is important, it is still in its infancy for the scientific research. Herein, we design and prepare TiO2 photonic crystals (TiO2 PCs) through a template-free anodization–calcination method for photocatalytic solar fuel production. Encouragingly, a slow photon effect was substantiated, contributing to enhanced light utilization ability. More importantly, we present the localized surface photothermal effect and explain how this heat arising from TiO2 PCs can be harnessed for photocatalytic reaction. Owing to its extraordinary physicochemical property and effective light utilization, photocatalytic CH4 production performance of TiO2 PCs is greater than that of commercial TiO2 and TiO2 nanotube arrays. Such a photothermal effect deriving from unique photonic crystal structure has great potential in photoconversion application.

中文翻译:

具有局部表面光热效应和增强的光催化CO 2还原活性的TiO 2光子晶体

通过吸收红外光产生的光热效应是各种生物调节体温的重要策略。尽管在现代人类技术(例如光转换和催化)中利用此效应很重要,但在科学研究中仍处于起步阶段。在这里,我们通过无模板阳极氧化-煅烧方法设计和制备TiO 2光子晶体(TiO 2 PCs),用于生产光催化太阳能燃料。令人鼓舞的是,证实了缓慢的光子效应,有助于提高光利用能力。更重要的是,我们介绍了局部表面光热效应,并解释了这种热是如何由TiO 2产生的可以利用PC进行光催化反应。由于其出色的理化性能和有效的光利用率,TiO 2 PC的光催化CH 4生产性能要比市售的TiO 2和TiO 2纳米管阵列高。这种源自独特光子晶体结构的光热效应在光转换应用中具有巨大的潜力。
更新日期:2018-10-02
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