Affiliation:
1. Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources Jiangsu Province Key Laboratory of Green Biomass‐based Fuels and Chemicals College of Chemical Engineering Nanjing Forestry University Nanjing 210037 China
Abstract
AbstractThis work reports a dual heterojunction of etched MIL‐68(In)‐NH2 (MN) supported heptazine‐/triazine‐based carbon nitride (HTCN) via a facile hydrothermal process for photocatalytic ammonia (NH3) synthesis. By applying the hydrothermal treatment, MN microrods are chemically etched into hollow microtubes, and HTCN with nanorod array structures are simultaneously tightly anchored on the outside surface of the microtubes. With the addition of 9 wt% HTCN, the resulting dual heterojunction presents an enhanced photocatalytic ammonia yield rate of 5.57 mm gcat−1 h−1 with an apparent quantum efficiency of 10.89% at 420 nm. Moreover, stable ammonia generation using seawater, tap water, lake water, and turbid water in the absence of sacrificial reagents verifies the potential of the dual‐heterojunction composites as a commercially viable photosystem. The obtained one‐dimensional (1D) microtubes and coating of HTCN confers this unique composite with extended visible‐light harvesting and accelerated charge carrier migration via a multi‐stepwise charge transfer pathway. This work provides a new strategy for optimizing nitrogen (N2)‐into‐ammonia conversion efficiency by designing novel dual‐heterojunction catalysts.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
3 articles.
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