Construction of Infrared-Light-Responsive Photoinduced Carriers Driver for Enhanced Photocatalytic Hydrogen Evolution.,Advanced Materials

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Construction of Infrared-Light-Responsive Photoinduced Carriers Driver for Enhanced Photocatalytic Hydrogen Evolution.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-02-11 , DOI: 10.1002/adma.201906361
Baoying Dai _{1,

2,

3} , Jiaojiao Fang _{1,

2,

3} , Yunru Yu ₄ , Menglong Sun _{1,

2,

3} , Hengming Huang _{1,

2,

3} , Chunhua Lu _{1,

2,

3} , Jiahui Kou _{1,

2,

3} , Yuanjin Zhao ₄ , Zhongzi Xu _{1,

2,

3}

Affiliation

Infrared light, more than 50% of the solar light energy, is long-termly ignored in the photocatalysis field due to its low photon energy. Herein, infrared-light-responsive photoinduced carriers driver is first constructed taking advantage of pyroelectric effect for enhancing photocatalytic hydrogen evolution. In order to give full play to its role, the photocatalytic reaction is localized on the surface and interface of the composite based on a new semi-immersion type heat collected photocatalytic microfiber system. The system is consisted of distinctive pyroelectric substrate poly(vinylidene fluoride-co-hexafluropropylene (PVDF-HFP), typical photothermal material carbon nanotube (CNT), and representative photocatalyst CdS. The transient photocurrent, electrochemical impedance spectroscopy, time-resolved photoluminescence and pyroelectric potential characterizations indicate that the infrared-light-responsive carriers driver significantly promotes the photogenerated charge separation, accelerates carrier migration, and prolongs carrier lifetime. The photocatalytic hydrogen evolution efficiency is remarkably improved more than five times with the highest average apparent quantum yield of 16.9%. It may open up new horizons to photocatalytic technology for the more efficient use of infrared light.

中文翻译：

用于增强光催化氢释放的红外光响应光诱导载流子驱动器的构建。

红外光占太阳能光能的50％以上，由于其光子能量低，长期以来在光催化领域被忽略。在此，首先利用热电效应来构建红外光响应性光致载流子驱动器，以增强光催化氢的释放。为了充分发挥其作用，基于新型的半浸入式集热光催化微纤维系统，光催化反应局限于复合材料的表面和界面。该系统由独特的热电基体聚偏二氟乙烯-共六氟丙烯（PVDF-HFP），典型的光热材料碳纳米管（CNT）和代表性的光催化剂CdS组成。瞬态光电流，电化学阻抗谱，时间分辨的光致发光和热电势表征表明，红外光响应载流子驱动器显着促进了光生电荷的分离，加速了载流子迁移，并延长了载流子寿命。光催化制氢效率显着提高了五倍以上，最高平均表观量子产率为16.9％。它可以为光催化技术开辟新的视野，以更有效地利用红外光。光催化制氢效率显着提高了五倍以上，最高平均表观量子产率为16.9％。它可以为光催化技术开辟新的视野，以更有效地利用红外光。光催化制氢效率显着提高了五倍以上，最高平均表观量子产率为16.9％。它可以为光催化技术开辟新的视野，以更有效地利用红外光。

更新日期：2020-03-24

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