Graphene role in improved solar photocatalytic performance of TiO2-RGO nanocomposite

被引：50
作者：
Garrafa-Galvez, Horacio Edgardo [1 ]
Alvarado-Beltran, Clemente Guadalupe [1 ]
Almaral-Sanchez, Jorge Luis [1 ]
Hurtado-Macias, Abel [2 ]
Garzon-Fontecha, Angelica Maria [3 ]
Logue, Priscy Alfredo [4 ]
Castro-Beltran, Andres [1 ]
机构：
[1] Univ Autonoma Sinaloa, Fuente Poseidon & Prol Angel Flores S-N, Los Mochis 81223, Sinaloa, Mexico
[2] Ctr Invest Mat Avanzados SC, Ave Miguel de Cervantes 120, Chihuahua 31109, Mexico
[3] Ctr Invest Cient & Educ Super Ensenada, Carretera Tijuana Ensenada 3918, Ensenada 22860, Baja California, Mexico
[4] Univ Autonoma Baja California, Carretera Transpeninsular Ensenada Tijuana 3917, Ensenada 22860, Baja California, Mexico
来源：
CHEMICAL PHYSICS | 2019年 / 521卷
关键词：
Solar photocatalysis; Recombination and trapping; Photosensitizer; Charger separator; Semiconductors; Composite materials; METHYLENE-BLUE; GRAPHITE OXIDE; BAND-GAP; LIGHT; DEGRADATION; COMPOSITE; PHOTODEGRADATION; SUNLIGHT; REMOVAL; ANATASE;
D O I：
10.1016/j.chemphys.2019.01.013
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
TiO2-RGO (TG) nanocomposite applied as photocatalysts have been synthesized via a facile low-temperature wet chemistry process, during which the reduction of graphene oxide (RGO) and the growth of titanium dioxide (TiO2) nanoparticles on the RGO nanosheets are achieved simultaneously. RGO role in TG nanocomposites as photocatalysts were analyzed in methylene blue photocatalytic degradation under UV and solar irradiation. The TG nanocomposites were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectroscopy and transmission electron microscopy. The photocatalytic efficiency of the TG-30 sample under UV and TG-45 solar irradiation was similar to 7 and similar to 5 times that of pristine TiO2, respectively. The enhancement of the photocatalytic activity with UV irradiation in TG was attributed to the high separation efficiency of photoinduced electron-hole pairs, while the enhancement of photocatalytic activity with solar irradiation in the TG was attributed to RGO role, acted as a photosensitizer and a charges separator, simultaneously.
引用
收藏
页码：35 / 43
页数：9
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