Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 4, Pages 4382-4389Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b06270
Keywords
Photocatalytic methane conversion; Graphic carbon nitride; Tungsten bronze cesium; Selective conversion; Low concentration methane
Categories
Funding
- National Natural Science Foundation of China [51472194, 51602237]
- NSFC of Hubei Province [2610CFA078]
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Although traditional thermal catalysis is usually used to convert methane into value-added products, its high reaction temperature results in a low performanceprice ratio in conversion of low concentration methane. In this regard, we synthesized a series of mace-like g-C3N4-decorated Cs0.33WO3 nanocomposites for photocatalytic conversion of low concentration methane under mild conditions. The optimized g-C3N4@Cs0.33WO3 (weight ratio = 3:7) photocatalyst selectively converted low concentration methane (1000 ppm) into methanol with a yield of 4.38 mol/h/g under light irradiation and at room temperature. Both performance experiments and trapping experiments verified that methane activation and methyl oxidation were involved in the photocatalytic conversion process of methane. The O(2) first activated the methane to methyl on the surface of g-C3N4 in the composite and then the photogenerated electrons from the Cs0.33WO3 in the composite inhibited the peroxidation and increased the generation of methanol. This research provides a new route to design and synthesize photocatalysts for converting methane into value-added chemicals.
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