Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 36, Pages 5719-5727Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201401279
Keywords
nanoplates; graphene; photocatalytic performance; photoluminescence; composite materials
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Funding
- Science and Technology Commission of Shanghai Municipality [13NM1400300]
- Shanghai Shu Guang Project [12SG01]
- National Natural Science Foundation of China [91123006, 51372040]
- Shanghai Pujiang Program [12PJ1400300]
- Innovation Program of Shanghai Municipal Education Commission [14ZZ003]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Program for New Century Excellent Talents in University [NCET-11-0102]
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There has been significant progress in the field of semiconductor photocatalysis, but it is still a challenge to fabricate low-cost and high-activity photocatalysts because of safety issues and non-secondary pollution to the environment. Here, 2D hexagonal nanoplates of -Fe2O3/graphene composites with relatively good distribution are synthesized for the first time using a simple, one-step, template-free, hydrothermal method that achieves the effective reduction of the graphene oxide (GO) to graphene and intimate and large contact interfaces of the -Fe2O3 nanoplates with graphene. The -Fe2O3/graphene composites showed significantly enhancement in the photocatalytic activity compared with the pure -Fe2O3 nanoplates. At an optimal ratio of 5 wt% graphene, 98% of Rhodamine (RhB) is decomposed with 20 min of irradiation, and the rate constant of the composites is almost four times higher than that of pure -Fe2O3 nanoplates. The decisive factors in improving the photocatalytic performance are the intimate and large contact interfaces between 2D hexagonal -Fe2O3 nanoplates and graphene, in addition to the high electron withdrawing/storing ability and the highconductivity of reduced graphene oxide (RGO) formed during the hydrothermal reaction. The effective charge transfer from -Fe2O3 nanoplates to graphene sheets is demonstrated by the significant weakening of photoluminescence in -Fe2O3/graphene composites.
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