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A novel graphdiyne (CnH2n−2) preparation strategy: calcium carbide-derived graphdiyne film supported cobalt tetroxide nanoneedles for photocatalytic hydrogen production
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-10-03 , DOI: 10.1039/d2ta06752h Xiangyi Wang 1 , Zhiliang Jin 1
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-10-03 , DOI: 10.1039/d2ta06752h Xiangyi Wang 1 , Zhiliang Jin 1
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Guiding the directional and effective migration of photocarriers is a basic strategy to achieve high performance of catalysts in the photocatalytic water splitting process. In this paper, a new carbon material of graphdiyne (GDY) was prepared by a mechanical ball milling method, and then it was introduced into metal oxide Co3O4 by an ultrasonic in situ stirring method. The lamellar film structure of GDY provides effective support for Co3O4 nanoneedles. It is undeniable that the Co3O4/GDY composite has excellent photocatalytic performance for hydrogen production. The highest hydrogen production activity of Co3O4/GDY-20 is 2456 μmol g−1, which is 7.7 times that of pure Co3O4. In addition, the successful construction of the two-phase S-scheme heterojunction creates favorable conditions for photoelectron migration, and separates the photoelectron–hole pairs successfully. Ultraviolet diffuse reflectance spectra reflect the light absorption capacity of the composite in a wide light wavelength range. Fluorescence spectra and electrochemical detection confirm that photoelectron migration in the composite is effectively regulated, which is very conducive to photocatalytic water splitting. The study shows that the introduction of carbon materials into metal oxides has great potential in the field of photocatalysis.
中文翻译：
一种新型石墨二炔 (CnH2n-2) 制备策略：碳化钙衍生石墨二炔薄膜负载四氧化钴纳米针用于光催化制氢
引导光载流子的定向有效迁移是实现光催化水分解过程中催化剂高性能的基本策略。本文采用机械球磨法制备石墨二炔（GDY）新型碳材料，然后通过超声原位搅拌法将其引入金属氧化物Co 3 O 4中。GDY的层状薄膜结构为Co 3 O 4纳米针提供了有效的支撑。不可否认，Co 3 O 4 /GDY复合材料具有优异的光催化制氢性能。Co 3 O 4产氢活性最高/GDY-20为2456 μmol g -1，是纯Co 3 O 4的7.7倍。此外，两相S型异质结的成功构建为光电子迁移创造了有利条件，并成功分离了光电子-空穴对。紫外漫反射光谱反映了复合材料在很宽的光波长范围内的光吸收能力。荧光光谱和电化学检测证实复合材料中的光电子迁移得到有效调控，非常有利于光催化水分解。研究表明，将碳材料引入金属氧化物中，在光催化领域具有巨大潜力。
更新日期：2022-10-03
中文翻译：
一种新型石墨二炔 (CnH2n-2) 制备策略：碳化钙衍生石墨二炔薄膜负载四氧化钴纳米针用于光催化制氢
引导光载流子的定向有效迁移是实现光催化水分解过程中催化剂高性能的基本策略。本文采用机械球磨法制备石墨二炔（GDY）新型碳材料，然后通过超声原位搅拌法将其引入金属氧化物Co 3 O 4中。GDY的层状薄膜结构为Co 3 O 4纳米针提供了有效的支撑。不可否认，Co 3 O 4 /GDY复合材料具有优异的光催化制氢性能。Co 3 O 4产氢活性最高/GDY-20为2456 μmol g -1，是纯Co 3 O 4的7.7倍。此外，两相S型异质结的成功构建为光电子迁移创造了有利条件，并成功分离了光电子-空穴对。紫外漫反射光谱反映了复合材料在很宽的光波长范围内的光吸收能力。荧光光谱和电化学检测证实复合材料中的光电子迁移得到有效调控，非常有利于光催化水分解。研究表明，将碳材料引入金属氧化物中，在光催化领域具有巨大潜力。
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