Enhanced photocatalytic activity and anti-photocorrosion of AgI nanostructures by coupling with graphene-analogue boron nitride nanosheets

Jiha Choi, D. Amaranatha Reddy, Tae Kyu Kim

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Abstract

Graphene-analogue boron nitride (BN) nanosheets wrapped with AgI nanocomposites were synthesized via an ultra-sonic chemical assisted method, without the use of organic stabilizers. A set of characterizations, including TEM, XRD, XPS, FTIR, optical absorption, and photoluminescence spectroscopies, confirm that the nanocomposites is formed from AgI nanocrystals and the graphene-analogue boron nitride nanosheets. The photocatalyst studies showed that AgI–BN nanocomposites exhibit significantly higher photocatalytic activity and anti-photocorrosion than the pure AgI, under simulated sunlight irradiation. Among the AgI–BN nanocomposites (wt% of BN=0.1, 0.2, 0.3, 0.4), AgI–BN (0.2 wt%) exhibited the best photocatalytic activity, as revealed by the degradation of Rhodamine B (RhB). The enhanced photocatalytic activities were mainly attributed to the enhanced light absorption and separation rate of photo-induced electrons and holes by interfacial transfer of photogenerated electrons through the BN nanosheets to the AgI nanostructures. In addition, nanocomposites exhibited the best catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4 as a reducing agent. It is expected that AgI–BN nanocomposites with promising catalytic activity and durability will be used in applications for environmental remediation.

Original languageEnglish
Pages (from-to)13793-13803
Number of pages11
JournalCeramics International
Volume41
Issue number10
DOIs
Publication statusPublished - 2015 Dec

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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