Enhanced Photocatalytic Activity of Bi 2WO 6 by the Synergistic Action of Ti(IV) and Graphene Bi-cocatalysts

【Author】

SONG Jia;XU Ying;MO Yan-Ping;LI Yong-An

【Institution】

Department of Chemistry,Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology;Department of Chemistry,Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology;Department of Chemistry,Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology;Department of Chemistry,Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology

【Abstract】

Cocatalyst modification is an effective way to promote the separation of photogenerated electron-hole pairs. The reduced graphene oxide (rGO) with high electron transfer rate and the amorphous Ti(IV) compounds as hole cocatalyst were loaded on the surface of highly-efficient and flake-like Bi 2WO 6 nanoparticles by a hydrothermal-impregnation method to prepare Ti(IV)-rGO/Bi 2WO 6 visible-light-driven photocatalyst. It was found that the Ti(IV) and rGO single-cocatalyst modified Bi 2WO 6 exhibited an enhanced photocatalytic activity and dual-cocatalyst modified Bi 2WO 6 photocatalyst showed higher photocatalytic performance than single-cocatalyst modified Bi 2WO 6. When the amount of Ti(IV) was 5 wt%, the photocatalytic rate constant of Ti(IV)-rGO/Bi 2WO 6 photocatalyst reached 2.2×10 ?2 min ?1, which was 88-fold that of bare Bi 2WO 6. The enhancement of photocatalytic performance mainly depends on the synergistic effect of novel Ti(IV)-hole cocatalyst and rGO-electron cocatalyst, namely, Ti(IV) compounds rapidly transfer the photogenerated holes, while rGO rapidly captures the photogenerated electrons. The present amorphous Ti(IV) and rGO cocatalysts can be widely applied in the design and development of highly efficient cocatalyst-modified photocatalytic materials.

【Keywords】

Bi 2WO 6;graphene;amorphous Ti(IV) hole-cocatalyst;visible-light photocatalytic activity

References

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Total: 36 articles

  • [1] YANG Yu-guo1,WANG Zhuo2,XU Jian-hua1,LIU Yue-hua2,CAO Shu-liang1(1.New Materials Research Institute of Shandong Academy of Sciences,Jinan 250014,China;2.School of Environment and Materials Engineering,Yantai University,Yantai 264005,China)(Received 5 June 2007,accepted 16 July 2007), Influence of Surfactants on Morphology of Lead Tungstate Crytalline, Journal of Synthetic Crystals,
  • [2] CHEN Yuan1,2,LIU Guocong1,3,LI Zhiyou2,HUANG Suping,ZHOU Kechao2,* 1Institute of Advanced Materials & Chembiosensing Technology,Yulin Normal University,Yulin 537000,Guangxi,China 2State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,Hunan,China 3College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China, Citric Acid-Assisted Hydrothermal Synthesis of Bi_2WO_6 Nanosheets for Highly Efficient Degradation of Methyl Orange under Visible Light Irradiation, Chinese Journal of Catalysis,
  • [3] YU Mei1,LIU Peng-Rui1,SUN Yu-Jing2,LIU Jian-Hua1,AN Jun-Wei1,LI Song-Mei1(1.Key Laboratory of Aerospace Materials and Performance,Ministry of Education,School of Materials Science and Engineering,Beihang University,Beijing 100191,China;2.State Intellectual Property Office of the People’s Republic of China,Beijing 100088,China), Fabrication and Characterization of Graphene-Ag Nanoparticles Composites, Journal of Inorganic Materials,
  • [4] GUI Ming-Sheng;WANG Peng-Fei;YUAN Dong;YANG Yi-Kun;College of Materials and Chemical Engineering, Sichuan University of Science & Engineering;, Synthesis and Visible-Light Photocatalytic Activity of Bi_2WO_6/g-C_3N_4 Composite Photocatalysts, Chinese Journal of Inorganic Chemistry,

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