Graphene-modified g-C3N4/ α-Fe2O3 systems for light-induced hydrogen generation

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Wassila Touati , Miroslava Filip Edelmannová , Mohamed Karmaoui , Ahmed Bekka , Clarisse Furgeaud , Chakib Alaoui , Imene kadi Allah , Bruno Figueiredo , J.A. Labrincha , Raul Arenal , Kamila Koci , David Maria Tobaldi
{"title":"Graphene-modified g-C3N4/ α-Fe2O3 systems for light-induced hydrogen generation","authors":"Wassila Touati ,&nbsp;Miroslava Filip Edelmannová ,&nbsp;Mohamed Karmaoui ,&nbsp;Ahmed Bekka ,&nbsp;Clarisse Furgeaud ,&nbsp;Chakib Alaoui ,&nbsp;Imene kadi Allah ,&nbsp;Bruno Figueiredo ,&nbsp;J.A. Labrincha ,&nbsp;Raul Arenal ,&nbsp;Kamila Koci ,&nbsp;David Maria Tobaldi","doi":"10.1016/j.cartre.2025.100491","DOIUrl":null,"url":null,"abstract":"<div><div>Photocatalysis represents an advanced and efficient technology for harnessing light energy. The non-toxicity, affordability, and versatility of this technique render it particularly attractive for hydrogen production via water splitting. Nevertheless, the primary challenge lies in identifying materials capable of efficiently catalyzing the water splitting reaction upon exposure to light. This study presents the influence of the quantity of hematite and graphene on g-C<sub>3</sub>N<sub>4</sub> in the context of hydrogen generation from methanol-water decomposition under UVC irradiation. Pure g-C<sub>3</sub>N<sub>4</sub> exhibits the highest hydrogen generation efficiency. However, adding hematite decreases photocatalytic efficiency, likely due to the formation of a type II heterojunction between α-Fe<sub>2</sub>O<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>, which reduces the overall reduction capacity of the system. While incorporating graphene into the g-C<sub>3</sub>N<sub>4</sub>/α-Fe<sub>2</sub>O<sub>3</sub> system enhances photocatalytic efficiency by improving electron mobility and prolonging the lifetime of photo-generated excitons, the highest yield was achieved with BUF10/GNP0.5. This research offers valuable insights into charge transfer and separation processes for photo-generated excitons within the g-C<sub>3</sub>N<sub>4</sub>/α-Fe<sub>2</sub>O<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>/α-Fe<sub>2</sub>O<sub>3</sub>/graphene systems in the context of light-induced hydrogen production.</div></div>","PeriodicalId":52629,"journal":{"name":"Carbon Trends","volume":"19 ","pages":"Article 100491"},"PeriodicalIF":3.1000,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon Trends","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2667056925000410","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

Photocatalysis represents an advanced and efficient technology for harnessing light energy. The non-toxicity, affordability, and versatility of this technique render it particularly attractive for hydrogen production via water splitting. Nevertheless, the primary challenge lies in identifying materials capable of efficiently catalyzing the water splitting reaction upon exposure to light. This study presents the influence of the quantity of hematite and graphene on g-C3N4 in the context of hydrogen generation from methanol-water decomposition under UVC irradiation. Pure g-C3N4 exhibits the highest hydrogen generation efficiency. However, adding hematite decreases photocatalytic efficiency, likely due to the formation of a type II heterojunction between α-Fe2O3 and g-C3N4, which reduces the overall reduction capacity of the system. While incorporating graphene into the g-C3N4/α-Fe2O3 system enhances photocatalytic efficiency by improving electron mobility and prolonging the lifetime of photo-generated excitons, the highest yield was achieved with BUF10/GNP0.5. This research offers valuable insights into charge transfer and separation processes for photo-generated excitons within the g-C3N4/α-Fe2O3 and g-C3N4/α-Fe2O3/graphene systems in the context of light-induced hydrogen production.
求助全文
约1分钟内获得全文 求助全文
来源期刊
Carbon Trends
Carbon Trends Materials Science-Materials Science (miscellaneous)
CiteScore
4.60
自引率
0.00%
发文量
88
审稿时长
77 days
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信