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Rational design of photocatalysts for selective reduction and oxidation

选择性还原和氧化光催化剂的合理设计

基本信息

批准号：
2298390
负责人：
金额：
--
依托单位：
University College London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2298390
关键词：
Rational design photocatalysts selective reduction

项目摘要

Aim: Selective reduction and oxidation of feedstock to high value chemicals is a big challenge in catalysis, which highly depends on the efficiency of the catalyst and always requires harsh experimental conditions. The project targets to develop robust photocatalysts to highly selectively reduce water to hydrogen fuel and/or oxidise biowaste eg. Glycerol to high value chemicals operated under mild experimental conditions. Objectives: A grand challenge facing our society today is energy security. Economical and robust technologies for renewable and clean energy synthesis are highly sought-after. In order to mitigate environmental and energy issues caused by mass consumption of exhaustible fossil fuels, the importance of developing alternative renewable and economically viable energy sources has been widely recognized. On the other hand, some cheap but versatile molecules, like glycerol, can be transformed to different value-added fine chemicals and products. Under sunlight, electron-hole pairs generated in semiconductors could selectively reduce water into hydrogen and selectively oxidise biowaste to produce valuable fine chemicals used in the chemical and pharmaceutical industry. Development of novel photocatalysts with high selectivity, efficiency, scalability, and cost-competitiveness is therefore targeted for hydrogen fuel and fine chemicals production in the project. The fundamental understanding will also be explored in order to further improve its efficiency. The objectives include (1) design and synthesis of hydrogen evolution photocatalysts for efficient light absorption and water reduction; (2) design and synthesis of selective oxidation photocatalysts for fine chemicals production; (3) using appropriate solid medium for charge transfer to generate hydrogen and fine chemicals simultaneously.Methodology: In this project, new photocatalysts will be rationally designed and synthesised by polymerisation, chemical deposition and microwave-hydrothermal method. Then they will be fully characterised by XRD, Raman, NMR, BET, UV-vis spectra etc. The photocatalysts will be analysed to assess their efficiency, selectivity and stability by my reaction system. The electron transfer mechanism in the photocatalysts will be studied by time resolved spectroscopies in collaboration with one member in the group, which will be fed back to photocatalysts selection and structure optimisation in order to further improve efficiency. This is within the domain of catalysis/photocatalysis.

目的：将原料选择性还原和氧化为高价值化学品是催化领域的一大挑战，它高度依赖于催化剂的效率，并且总是需要苛刻的实验条件。该项目的目标是开发强大的光催化剂，以高度选择性地将水还原为氢燃料和/或氧化生物废物，例如。在温和的实验条件下操作的甘油到高价值化学品。目标：当今社会面临的一项重大挑战是能源安全。用于可再生和清洁能源合成的经济且强大的技术备受追捧。为了减轻因大量消耗可耗尽化石燃料而造成的环境和能源问题，开发替代性可再生且经济上可行的能源的重要性已得到广泛认识。另一方面，一些廉价但用途广泛的分子，如甘油，可以转化为不同增值的精细化学品和产品。在阳光下，半导体中产生的电子空穴对可以选择性地将水还原为氢气，并选择性氧化生物废物，以生产用于化学和制药行业的有价值的精细化学品。因此，该项目的目标是开发具有高选择性、高效率、可扩展性和成本竞争力的新型光催化剂，用于氢燃料和精细化学品的生产。还将探讨基本认识，以进一步提高其效率。目标包括（1）设计和合成用于高效光吸收和减水的析氢光催化剂；（2）精细化学品生产用选择性氧化光催化剂的设计与合成； (3)利用合适的固体介质进行电荷转移，同时产生氢气和精细化学品。方法：本项目将通过聚合、化学沉积和微波水热法合理设计和合成新型光催化剂。然后将通过 XRD、拉曼、核磁共振、BET、紫外可见光谱等对它们进行全面表征。将通过我的反应系统对光催化剂进行分析以评估其效率、选择性和稳定性。将与该小组的一名成员合作，通过时间分辨光谱研究光催化剂中的电子转移机制，并将其反馈到光催化剂的选择和结构优化，以进一步提高效率。这属于催化/光催化领域。

项目成果

期刊论文数量（9）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Defect-Free Single-Layer Graphene by 10 s Microwave Solid Exfoliation and Its Application for Catalytic Water Splitting.

DOI：
10.1021/acsami.1c03906
发表时间：
2021-06-23
期刊：
ACS applied materials & interfaces
影响因子：
9.5
作者：
Bayazit MK;Xiong L;Jiang C;Moniz SJA;White E;Shaffer MSP;Tang J
通讯作者：
Tang J

Ultrathin sulfur-doped holey carbon nitride nanosheets with superior photocatalytic hydrogen production from water

DOI：
10.1016/j.apcatb.2020.119742
发表时间：
2021-05-05
期刊：
APPLIED CATALYSIS B-ENVIRONMENTAL
影响因子：
22.1
作者：
Luo, Lei;Gong, Zhuyu;Tang, Junwang
通讯作者：
Tang, Junwang

Molecular Cobalt Catalysts Grafted onto Polymers for Efficient Hydrogen Generation Cathodes

DOI：
10.1002/solr.202000281
发表时间：
2020-08-06
期刊：
SOLAR RRL
影响因子：
7.9
作者：
Li, Cheng-Bo;Chu, Yilong;Tang, Junwang
通讯作者：
Tang, Junwang

Co3+-O-V4+ cluster in CoVOx nanorods for efficient and stable electrochemical oxygen evolution

DOI：
10.1016/j.apcatb.2020.119571
发表时间：
2021-03
期刊：
Applied Catalysis B: Environmental
影响因子：
0
作者：
Chaoran Jiang;Ji Yang;Tingting Zhao;Lunqiao Xiong;Zhengxiao Guo;Yujing Ren;Haifeng Qi;Aiqin Wang;Junwang Tang
通讯作者：
Chaoran Jiang;Ji Yang;Tingting Zhao;Lunqiao Xiong;Zhengxiao Guo;Yujing Ren;Haifeng Qi;Aiqin Wang;Junwang Tang

Bridging-nitrogen defects modified graphitic carbon nitride nanosheet for boosted photocatalytic hydrogen production