Chemical design and DFT approach of heterojunction photocatalysts for CO2 reduction

用于 CO2 还原的异质结光催化剂的化学设计和 DFT 方法

基本信息

批准号：
22KF0285
负责人：
笹木圭子
金额：
$ 1.47万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for JSPS Fellows
财政年份：
2023
资助国家：
日本
起止时间：
2023-03-08 至 2024-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22KF0285/
关键词：
photocatalysis graphitic carbon nitride mixed metal oxides heterojunction hydrogen generation pollutant degradation Photocatalysis multi-metal oxide CO2 reduction solar fuels

项目摘要

A simple chemical synthesis was used to prepare mixed metal oxide namely calcium ferrite (CaFe2O4). Different amounts of CaFe2O4 were mixed with right amount of urea and calcined in a muffle furnace to make graphitic carbon nitride(g-C3N4)-CaFe2O4 heterojunction. The photodegradation of ciprofloxacin and phenol was evaluated using as-synthesized composites. Improved photocatalytic performance of composite was confirmed by electrochemical and X-ray photoelectron spectroscopy analyses. Scavenging studies and electron spin resonance spectra were used to determine active species responsible for the photodegradation process. Depending on these results, the Z-scheme charge transfer pathway is proposed and confirmed. In October 2022, this work was published in Chemical Engineering Journal. In next work, hydrothermal method was used to prepare copper cobaltite (CuCo2O4) and formed a heterojunction with g-C3N4 nanotubes. Using platinum (Pt) as a co-catalyst in as-synthesized heterojunction we evaluated its performance towards photocatalytic hydrogen evolution reaction using aqueous triethanolamine solution. Two different techniques namely photo-reduction and chemical reduction were used for reducing the Pt nanoparticles over CuCo2O4/g-C3N4 composites. The photocatalytic performance was evaluated towards H2 evolution. Mechanism for the enhanced performance in the photo-reduced Pt over the composite is evaluated based on various analytical techniques such as TEM and EXAFS. Mechanism for charge transfer is proposed. The work will soon be submitted for evaluation to reputed journal.

使用简单的化学合成来制备混合金属氧化物，即铁酸钙（CaFe2O4）。将不同量的CaFe2O4与适量的尿素混合，在马弗炉中煅烧，制得石墨氮化碳(g-C3N4)-CaFe2O4异质结。使用合成的复合材料评估环丙沙星和苯酚的光降解作用。电化学和X射线光电子能谱分析证实了复合材料光催化性能的改善。清除研究和电子自旋共振光谱用于确定负责光降解过程的活性物质。根据这些结果，提出并确认了 Z 型电荷转移路径。 2022年10月，该工作发表在Chemical Engineering Journal上。在接下来的工作中，采用水热法制备了钴酸铜（CuCo2O4）并与g-C3N4纳米管形成异质结。使用铂（Pt）作为合成异质结中的助催化剂，我们使用三乙醇胺水溶液评估了其在光催化析氢反应中的性能。使用两种不同的技术，即光还原和化学还原，在 CuCo2O4/g-C3N4 复合材料上还原 Pt 纳米颗粒。光催化性能针对氢气的析出进行了评估。基于各种分析技术（例如 TEM 和 EXAFS）评估复合材料中光还原 Pt 增强性能的机制。提出了电荷转移机制。该作品很快将提交给知名期刊进行评估。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Simple tactic polycondensation synthesis of Z-scheme Quasi-Polymeric g-C3N4/CaFe2O4 composite for enhanced photocatalytic water depollution via p-n heterojunction

DOI：
10.1016/j.cej.2022.139758
发表时间：
2022-10
期刊：
Chemical Engineering Journal
影响因子：
15.1
作者：
Sulakshana Shenoy;Chitiphon Chuaicham;T. Okumura;S. Karthikeyan;K. Sasaki
通讯作者：
Sulakshana Shenoy;Chitiphon Chuaicham;T. Okumura;S. Karthikeyan;K. Sasaki

Fabrication of Reduced Ag Nanoparticle Using Crude Extract of Cinnamon Decorated on ZnO as a Photocatalyst for Hexavalent Chromium Reduction

ZnO 修饰肉桂粗提物制备还原银纳米粒子作为六价铬还原光催化剂

DOI：
10.3390/catal13020265
发表时间：
2023
期刊：
Catalysts
影响因子：
3.9
作者：
Rizki Intan Nurul;Inoue Takumi;Chuaicham Chitiphon;Shenoy Sulakshana;Srikhaow Assadawoot;Sekar Karthikeyan;Sasaki Keiko
通讯作者：
Sasaki Keiko

Bio-reduced Ag nanoparticle decorated on ZnO for enhancement of photocatalytic reduction of hexavalent chromium and photocatalytic degradation of rhodamine B

ZnO上修饰的生物还原银纳米粒子增强六价铬的光催化还原和罗丹明B的光催化降解

DOI：
10.1016/j.jallcom.2023.168797
发表时间：
2023
期刊：
Journal of Alloys and Compounds
影响因子：
6.2
作者：
Chuaicham Chitiphon;Rizki Intan Nurul;Sekar Karthikeyan;Shenoy Sulakshana;Srikhaow Assadawoot;Trakulmututa Jirawat;Sasaki Keiko
通讯作者：
Sasaki Keiko

Unveiling the influence of Fe2O3 nanoparticles on CuxO-TiO2(B) nanofibers for dual Z-scheme electron transfer visible light photocatalysts: investigation on local atomic structures and electronic properties

揭示 Fe2O3 纳米粒子对 CuxO-TiO2(B) 纳米纤维对双 Z 型电子转移可见光光催化剂的影响：局部原子结构和电子特性的研究

DOI：
10.1039/d3en00038a
发表时间：
2023
期刊：
Environmental Science: Nano
影响因子：
0
作者：
Preeyanghaa Mani;Chuaicham Chitiphon;Shenoy Sulakshana;Vellaichamy Balakumar;Li Wei;Manokaran Kamaraj;Varathan Elumalai;Neppolian Bernaurdshaw;Ohtani Bunsho;Sasaki Keiko;Sekar Karthikeyan
通讯作者：
Sekar Karthikeyan

SRM Institute of Science and Technology(インド)

SRM科学技术研究所（印度）