Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 3, Pages 2477-2484Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b13597
Keywords
mesoporous carbon; silica template; NaOH etching; catalytic oxidation; H2S removal
Funding
- MOST [2014CB239702]
- National Science Foundation of China [51302083, 21576090, 21506061]
- Fundamental Research Funds for the Central Universities and Shanghai Raising Star Program
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A general synthesis of alkaline mesoporous carbons (AMCs) is developed based on a simplified silica templating Method for room-temperature catalytic oxidation of H2S. The key to the success relies on dissolving the silica templates to create the interconnected mesoporous structure as well as leaving parts of the alkaline products in the pores; both of them are prerequisites for H2S oxidation. By adjusting the alkaline etching degree and organic/inorganic ratio, the porosity and basicity of the AMC could be simultaneously tuned, allowing the AMCs direct use for H2S catalytic oxidation with an unprecedented removal capacities of 4.49 +/- 0.12 g/g. Such excellent catalytic performance should be attributed to the developed pore structure-that stores the product sulfur and the strong basicity that promotes the dissociation of H2S into HS- ions. Moreover, this simplified silica-templating method could be easily extended to the preparation of various silica templated mesoporous carbon catalysts. All these AMCs demonstrate a successful combination of low cost with high performance, which may well be the answer for the technical development- of industrial H2S removal.
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