首页|NH2-UiO-66/PyPD-COF异质结构筑及高效光催化产氢

NH2-UiO-66/PyPD-COF异质结构筑及高效光催化产氢

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有机框架化合物因分子水平结构可控、大的比表面积、高孔隙率、分散的化学活性位点以及良好稳定性等优点,在光催化解水制氢方面具有较大的应用潜力.采用溶剂热法,在共价有机框架PyPD-COF的合成过程中引入金属有机框架NH2-UiO-66,原位形成NH2-UiO-66/PyPD-COF异质结.通过TEM、EDS、XPS、FTIR、UV-Vis和光电流测试分析,光催化性能测试等手段对样品进行表征,构筑的NH2-UiO-66/PyPD-COF异质结不仅可以保留原始MOF及COF组分的优良特性,还可在异质界面形成键连,利于促进界面间电荷迁移,降低电子-空穴复合率,提升光催化产氢效率至20.68 mmol·h-1·g-1,分别为原始NH2-UiO-66和PyPD-COF的86倍和3倍.同时,界面处的共价键键连使得复合样品具有良好的制氢稳定性,这为构筑高效光催化分解水产氢异质结光催化剂提供了一种新的策略.
Constructing NH2-UiO-66/PyPD-COF heterojunction to promote efficient photocatalytic hydrogen production
Organic framework compounds have great application potential in photocatalytic water hydrogen pro-duction due to the advantages of controllable molecular structure,large specific surface area,high porosity,dis-persed chemical active sites and good stability.In this paper,the metal-organic framework NH2-UiO-66 was in-troduced into the synthesis process of the covalent organic framework PyPD-COF by solvothermal method,and NH2-UiO-66/PyPD-COF heterojunction was formed in situ.The samples were characterized by TEM,EDS,XPS,FTIR,UV-Vis and photocurrent analysis,as well as photocatalytic performance test.The constructed NH2-UiO-66/PyPD-COF heterojunction could not only retain the excellent properties of the original MOF and COF components,but also form bonds at the heterogeneous interface.It is beneficial to promote interfacial charge transfer,reduce electron-hole recombination rate,and increase photocatalytic hydrogen production effi-ciency to 20.68 mmol/(h·g),which is 86 times and 3 times of the original NH2-UiO-66 and PyPD-COF,re-spectively.At the same time,the covalent bond at the interface makes the composite sample have good hydro-gen production stability,which provides a new strategy for the construction of efficient photocatalytic decompo-sition of aquatic hydrogen heterojunction photocatalysts.

MOFs(NH2-UiO-66)COFs(PyPD-COF)heterojunctionin-situ growthphotocatalysis hydrogen production

吴海洋、张楠琦、牟迪、何漩、杜星、王大珩、方伟、陈辉、李薇馨、赵雷

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武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉 430081

NH2-UiO-66 PyPD-COF 异质结 原位生长 光催化产氢

国家自然科学基金项目湖北省自然科学基金湖北省自然科学基金湖北省自然科学基金湖北省重点研究项目武汉市知识创新工程湖北省教育厅科研计划

221051512021CFB4692021CFB1242022CFB6262022BAA0942022010801010306B2022017

2024

10.3969/j.issn.1001-9731.2024.01.019

功能材料
重庆材料研究院 中国仪器仪表学会仪表材料学会

功能材料

CSTPCD北大核心
影响因子：0.918
ISSN：1001-9731
年,卷(期)：2024.55(1)