Citation: QI Qi, WANG Yu-Qiao, WANG Sha-Sha, QI Hao-Nan, WEI Tao, SUN Yue-Ming. Preparation of Reduced Graphene Oxide/TiO₂ Nanocomposites and Their Photocatalytic Properties[J]. Acta Physico-Chimica Sinica, ;2015, 31(12): 2332-2340. doi: 10.3866/PKU.WHXB201510202 shu

Preparation of Reduced Graphene Oxide/TiO₂ Nanocomposites and Their Photocatalytic Properties

QI Qi ¹ ,
WANG Yu-Qiao ^1,, ,
WANG Sha-Sha ¹ ,
QI Hao-Nan ¹ ,
WEI Tao ² ,
SUN Yue-Ming ^1,,

1.
1School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China;
2.
2 School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, P. R. China

Corresponding author: WANG Yu-Qiao, SUN Yue-Ming,
Received Date: 21 August 2015
Available Online: 20 October 2015
Fund Project: 国家自然科学基金(21173042) (21173042) 国家重点基础研究发展规划项目(973) (2013CB932902) (973) (2013CB932902) 中央高校基本科研业务费(2242014K10025,3207045419) (2242014K10025,3207045419) 江苏省自然科学基金(BK20141338) (BK20141338) 江苏省工业支撑计划(BE2013118) (BE2013118) 江苏省科技成果转化专项资金(BA2014069) (BA2014069) 东南大学校级研讨课基金(1107041501) (1107041501)江苏省普通高校研究生实践创新计划项目(SJLX150047)资助 (SJLX150047)

P25-reduced graphene oxide nanocomposites (RGO-P25) are prepared by using a facile one-step hydrothermal method. Their structure and photoelectrical properties are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS). The degradation effect of different addition ratios of the RGO-P25 nanocomposite on the photocatalytic degradation of methylene blue (MB) is investigated under UV and visible illumination. Results show that graphene oxide can be reduced during the hydrothermal reaction and thus, a mixed high defect P25 particles and RGO sheet composite is formed by electrostatic attraction. Band gaps of nanocomposites decreased from 3.00 to 2.27 eV with an increase in the amount of the RGO content. The electrical conductivities of the nanocomposites enhanced with an increased RGO amount. Over 80% of the initial methylene blue dye is decomposed by 1% (w, mass fraction) RGO-P25 after 30 min under either visible light or ultraviolet light. Under UV light illumination, 63% (molar fraction) of the N3 dye, cis-Ru(H₂dcbpy)₂(NCS)₂ (H₂dcbpy = 4,4'- dicarboxy-2,2'-bipyridyl), is decomposed by the 1% RGO-P25 nanocomposite. Compared with the bare P25 (75% anatase; 25% rutile), the continual addition of RGO enhances the photocatalytic activity and gives rise to the more effective separation of photogenerated electron-hole pairs.
- Graphene,
- TiO₂,
- Nanocomposite,
- Hydrothermal method,
- Photocatalysis property
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Preparation of Reduced Graphene Oxide/TiO2 Nanocomposites and Their Photocatalytic Properties

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Preparation of Reduced Graphene Oxide/TiO₂ Nanocomposites and Their Photocatalytic Properties