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.
Bibliographical noteFunding Information:
This work was financially supported by the National Research Foundation of Korea (NRF) grants funded by the Korean government (MEST and MSIP) ( 2007-0056095 , 2013S1A2A2035406 , 2013R1A1A2009575 , and 2014R1A4A1001690 ).
This work was financially supported by the National Research Foundation of Korea (NRF) grants funded by the Korean government (MEST and MSIP) (2007-0056095, 2013S1A2A2035406, 2013R1A1A2009575, and 2014R1A4A1001690).
© 2015 Elsevier Ltd and Techna Group S.r.l.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry