多孔g-C3N4和碳化三聚氰胺泡沫的一体化构筑促进光催化分解水蒸气
Boosting photocatalytic water vapor splitting by the integration of porous g-C3N4 and carbonized melamine foam
王树建 1柳东杰 1张春阳 1黄婕 1赵仕东 1吕科见 1王标 1彭好 1司亦涛 2刘茂昌3
作者信息
- 1. International Research Center for Renewable Energy,State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China
- 2. International Research Center for Renewable Energy,State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China
- 3. International Research Center for Renewable Energy,State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Suzhou Academy of Xi'an Jiaotong University,Suzhou 215123,China;Gree Altairnano New Energy Inc.,Zhuhai 519040,China
- 折叠
摘要
本文报道了一种光热诱导的液-固/气-固解耦光催化分解水系统,其中碳化的三聚氰胺泡沫(CMF)和多孔g-C3N4(PCN)分别作为光热基底材料和模型光催化剂.CMF通过其光热效应将液态水转化为水蒸气,随后产生的水蒸气通过PCN光催化剂转化为氢气.该新型两相光催化体系的光催化速率高达368.1 μmol h-1,分别是传统三相PCN体系(151.7 μmol h-1)和CN体系(14.4 μmol h-1)的2.4和25.6倍.光催化性能的提高主要归因于该系统优化了气-液-固反应界面的能量和物质传递,实现了光催化过程中气体产物的快速脱附.这项工作从能量流和质量流角度为光催化分解水提供了新的思路.
Abstract
We report a photothermally-induced liquid-solid/gas-solid-decoupling photocatalytic water-splitting sys-tem,where a carbonized melamine foam(CMF)and a porous g-C3N4(PCN)serve as the photothermal substrate and model photocatalyst,respectively.Specifically,liquid water is trans-formed into the gaseous phase over the CMF due to the pho-tothermal effect,and the generated vapor can be split into hydrogen by PCN via the photocatalysis.This unique biphasic photocatalytic system exhibits a high hydrogen production rate of 368.1 μmol h-1,which is 2.4 and 25.6 times larger than those of the traditional triphasic PCN system(151.7 μmol h-1)and g-C3N4(CN)system(14.4 μmol h-1),respectively.The improved photocatalytic performance is mainly attributed to the optimized energy and mass transfer at the gas-liquid-solid reaction interface,where gas products are rapidly desorbed in the photocatalytic process.This work provides a novel strategy to enhance the photocatalytic performance from the perspec-tives of energy and mass flow.
关键词
photocatalytic/photothermal/mass transfer/g-C3N4/gas-solidKey words
photocatalytic/photothermal/mass transfer/g-C3N4/gas-solid引用本文复制引用
基金项目
National Key Research and Development Program of China(2022YFB3803600)
National Natural Science Foundation of China(52276212)
Key Research and Development Program in Shaanxi Province of China(2023-YBGY-300)
Natural Science Foundation of Jiangsu Province(BK20231211)
Suzhou Science and Technology Program(SYG202101)
Zhuhai Innovation and Entrepreneurship Team Project(2120004000225)
China Fundamental Research Funds for the Central Universities()
出版年
2024
NETL
NSTL
万方数据