Donor-Acceptor-Type Heptazine-Based Polymer Networks for Photocatalytic Hydrogen Evolution

详细信息    查看全文

• 作者：Prof. Dr. Kamalakannan Kailasam ; Maria B. Mesch ; Dr. Lennart Mö ; hlmann ; Moritz Baar ; Prof. Dr. Siegfried Blechert ; Dr. Michael Schwarze ; Marc Schrö ; der ; Prof. Dr. Reinhard Schomcker ; Prof. Dr. Jü ; rgen Senker and Prof. Dr. Arne Thomas
• 刊名：Energy Technology
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：4
• 期：6
• 页码：744-750
• 全文大小：1325K
• ISSN：2194-4296

文摘

A heptazine-based polymer network (HMP-3) with a donor–acceptor (D–A) structure was prepared and tested as catalyst for photocatalytic hydrogen evolution from water. Compared to other heptazine-based materials, which are typically prepared at high temperatures and have recently received much interest as metal-free photocatalysts, the low-temperature protocol applied here allows the defined introduction of organic functional groups within the polymer backbone. The structure of HMP-3 contains alternating heptazine and benzothiadiazole moieties as electron acceptors connected by aminobenzene bridges as electron donors. The resulting material leads to enhanced hydrogen evolution compared to graphitic carbon nitride materials prepared at high temperatures (>500 °C) most probably because of the stabilization of photogenerated charge carriers in the D–A structure.