期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 116, 期 12, 页码 7180-7184出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp210216w
关键词
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资金
- Priority Research Centers Program [2009-0093818]
- National Research Foundation of Korea (NRF) [2011-0003237]
- Ministry of Education, Science and Technology (MEST)
The photocatalytic performance of a multidimensional heterojunction composed of decorated Ag nanoparticles on ZnO nanorods vertically grown on a chemically converted graphene (CCG) was investigated. The combined heterojunction helps to improve photocatalytic activity by increasing light absorption, preventing photo. induced electron-hole recombination, and providing a carrier pathway for the giant pi-conjugated system of CCG. A significant finding was that the low work function value of Ag (-4.74 eV) at the (111) surface makes possible the transfer of electrons from CCG to Ag. Consequently, the degree of photodegradation by Ag/ZnO/CCG is much higher than the sum of photodegradations by Ag/ZnO and ZnO/CCG samples, which indicates that the combination of metal, CCG, and semiconductor provides enhanced photocatalytic activity through the double transference of electrons.
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