Template free mild hydrothermal synthesis of core-shell Cu2O(Cu)@CuO visible light photocatalysts for N-acetyl-para-aminophenol degradation

Sekar Karthikeyan, Chitiphon Chuaicham, Radheshyam R. Pawar, Keiko Sasaki, Wei Li, Adam F. Lee, Karen Wilson

研究成果: ジャーナルへの寄稿記事

抄録

Solar photocatalytic processes are a promising approach to environmental remediation, however their implementation requires improvements in visible light harvesting and conversion and a focus on low cost, Earth abundant materials. Semiconducting copper oxides are promising visible light photocatalysts for solar fuels and wastewater depollution. Here we report the mild, hydrothermal (template-free) synthesis of core-shell Cu2O(Cu)@CuO photocatalytic architectures for the visible light photocatalytic degradation of N-acetyl-para-aminophenol (APAP). Hollow and rattle-like core-shell nanosphere aggregates with diameters between 200 nm and 2.5 μm formed under different synthesis conditions; all comprised an inner Cu2O shell, formed of 10-50 nm nanoparticles, surrounded by a protective corona of CuO nanoparticles. High reductant and structure-directing agent concentrations promoted the formation of a yolk-like Cu2O/Cu core, associated with improved photophysical properties, notably a high oxidation potential and suppressed charge carrier recombination, that correlated with the highest apparent quantum efficiency (8%) and rate of APAP removal (7 μmol g-1 min-1). Trapping experiments demonstrated hydroxyl radicals were the primary active species responsible for APAP oxidation to quinones and short chain carboxylic acids. Rattle-like core-shell Cu2O/Cu@CuO nanospheres exhibited excellent physiochemical stability and recyclability for APAP photocatalytic degradation.

元の言語英語
ページ(範囲)20767-20777
ページ数11
ジャーナルJournal of Materials Chemistry A
7
発行部数36
DOI
出版物ステータス出版済み - 1 1 2019

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Hydrothermal synthesis
Photocatalysts
Nanospheres
Degradation
Nanoparticles
Oxidation
Copper oxides
Charge carriers
Quantum efficiency
Carboxylic acids
Quinones
Reducing Agents
Wastewater
Carboxylic Acids
Earth (planet)
Hydroxyl Radical
4-aminophenol
Costs
Experiments

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

これを引用

Template free mild hydrothermal synthesis of core-shell Cu2O(Cu)@CuO visible light photocatalysts for N-acetyl-para-aminophenol degradation. / Karthikeyan, Sekar; Chuaicham, Chitiphon; Pawar, Radheshyam R.; Sasaki, Keiko; Li, Wei; Lee, Adam F.; Wilson, Karen.

:: Journal of Materials Chemistry A, 巻 7, 番号 36, 01.01.2019, p. 20767-20777.

研究成果: ジャーナルへの寄稿記事

Karthikeyan, Sekar ; Chuaicham, Chitiphon ; Pawar, Radheshyam R. ; Sasaki, Keiko ; Li, Wei ; Lee, Adam F. ; Wilson, Karen. / Template free mild hydrothermal synthesis of core-shell Cu2O(Cu)@CuO visible light photocatalysts for N-acetyl-para-aminophenol degradation. :: Journal of Materials Chemistry A. 2019 ; 巻 7, 番号 36. pp. 20767-20777.
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