Journal
LANGMUIR
Volume 28, Issue 21, Pages 8224-8229Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la301429g
Keywords
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Funding
- Ministry of Science and Technology of China [2009CB22008, 2007CB808004]
- National Natural Science Foundation of China [21090343, 91027041, 20920102033, 50973125]
- Solar Energy Initiative of the Chinese Academy of Sciences
- Bureau for Basic Research of the Chinese Academy of Sciences
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To make clean reduced GO sheets in high quality and in large scale, a natural reduced nicotinamine adenine dinucleotide NAD(P)H model, Hantzsch 1,4-dihydropyridine (HEH), is used as a mild organic photoreductant in this work. Benefiting from the intense absorption of HEM in the range of 300-420 nm, the graphene oxide (GO) can be readily reduced by HEH under UV light irradiation (lambda > 320 nm) to afford single or few-layer reduced graphene oxide at room temperature. Studies on reduction extent reveal that both irradiation time and concentration ratio of HEH to GO are important for effective reduction of GO under UV light. The as-prepared photochemically reduced graphene oxide (PRGO) dispersion is stable without the need for any polymeric or surfactant stabilizers. Simply by extraction treatment, the clean PRGO sheets can be obtained in large quantities, and its conductivity approaches to 4680 S.m(-1) that is the highest value reported by photochemical approaches so far.
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