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Issue 19, 2018
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Enhanced hydrogen photogeneration by bulk g-C3N4 through a simple and efficient oxidation route

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Abstract

The search for new environment-friendly visible-light absorbing catalysts is an urgent task. g-C3N4 has excellent photocatalytic properties and the possibility of developing cost-effective routes to make this material a viable alternative to the currently used catalysts is required. In this work, we show that a simple chemical oxidation process of g-C3N4 with nitric acid allowed significantly enhancing the hydrogen photogeneration from aqueous triethanolamine, under simulated solar light. An 8-fold improvement of the H2 production, with respect to the pristine sample, was achieved by properly controlling the physical–chemical parameters of the oxidation process, reaching a value of about 4000 μmol g−1 h−1, which is one of the highest hydrogen production rates for bulk g-C3N4. Such high levels of photocatalytic activity result from the combination of improved surface area and changes in the electronic structure induced by the oxidation process.

Graphical abstract: Enhanced hydrogen photogeneration by bulk g-C3N4 through a simple and efficient oxidation route

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Publication details

The article was received on 22 Jan 2018, accepted on 23 Apr 2018 and first published on 23 Apr 2018


Article type: Paper
DOI: 10.1039/C8DT00276B
Citation: Dalton Trans., 2018,47, 6772-6778
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    Enhanced hydrogen photogeneration by bulk g-C3N4 through a simple and efficient oxidation route

    A. Pisanu, A. Speltini, B. Vigani, F. Ferrari, M. Mannini, N. Calisi, B. Cortigiani, A. Caneschi, P. Quadrelli, A. Profumo and L. Malavasi, Dalton Trans., 2018, 47, 6772
    DOI: 10.1039/C8DT00276B

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