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Au/PtO nanoparticle-modified g-C3N4 for plasmon-enhanced photocatalytic hydrogen evolution under visible light

Jiang, Jing, Yu, Jiaguo, Cao, Shaowen
Journal of colloid and interface science 2016 v.461 pp. 56-63
carbon nitride, gold, graphene, hydrogen, hydrogen production, nanogold, nanoparticles, photocatalysis, photocatalysts, renewable energy sources, surface plasmon resonance, synergism
Photocatalytic hydrogen evolution under visible light is of great potential for renewable energy development. In this work, unalloyed Au/PtO nanoparticle (NP) co-modified graphitic carbon nitride (g-C3N4) photocatalyst is fabricated through a simple photodeposition method. The obtained g-C3N4 composites with co-existed Au and PtO cocatalysts exhibit a considerable enhancement in the photocatalytic hydrogen evolution activity and possess good stability during cycling experiments. The optimal Au–PtO/g-C3N4 photocatalyst shows a H2 production rate of 16.9μmolh⁻¹, which exceeds that of PtO/g-C3N4 and Au/g-C3N4 by a factor of 1.5 and 10.6, respectively. Further characterizations demonstrate that the synergetic action of electron-sink and catalytic effects of PtO along with surface plasmon resonance (SPR) effect of Au NPs, greatly improves the photocatalytic performance of g-C3N4 under visible light. Our study should bring in new insight into the design of effective g-C3N4-based photocatalysts for solar-to-fuel conversion.