High performance H2O2 production achieved by sulfur-doped carbon on CdS photocatalyst via inhibiting reverse H2O2 decomposition
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- High performance H2O2 production achieved by sulfur-doped carbon on CdS photocatalyst via inhibiting reverse H2O2 decomposition
- Lee, Jae Hwa; Cho, Hyeonjin; Park, Sung O; Hwang, Jeong Min; Hong, Yerin; Sharma, Pankaj; Jeon, Woo Cheol; Cho, Yongjoon; Yang, Changduk; Kwak, Sang Kyu; Moon, Hoi Ri; Jang, Ji-Wook
- Issue Date
- APPLIED CATALYSIS B: ENVIRONMENTAL, v.284, pp.119690
- Solar production of hydrogen peroxide (H2O2) from oxygen gas and water using photocatalysts is a safe, cost-effective, and eco-friendly method. However, the development of efficient photocatalysts has been impeded by their high decomposition rate of photogenerated H2O2 on the surface of photocatalysts. Here we report CdS/sulfur-doped carbon nanocomposites prepared by adopting a Cd- and S-containing metal-organic framework as a precursor. The intimate contact between the two components provoked their synergetic effect for much better H2O2 production performance than that of commercial CdS, where the hydrophobic sulfur-doped carbon prevent the approach of H2O2 and suppress its decomposition. Resultingly, it recorded H2O2 concentration of 17.1 mM under visible light irradiation in KOH solution with 2-propanol as a hole scavenger, which is the highest value among all the reported photocatalysis systems. This value is sufficiently high to be directly utilized in area of bleaching and acidic waste treatments.
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