TiO2 Nanoparticles Incorporated with Graphite Particles: An Efficient Photocatalyst for the Photocatalytic Reduction of Cr(VI) Ions in Aqueous Solution

被引：3

作者：

Long, Yingzhao ^{[1
]}

Lu, Ying ^{[1
]}

Lu, Yi ^{[1
]}

Kang, Shi-Zhao ^{[2
]}

Mu, Jin ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

[2] Shanghai Inst Technol, Dept Chem Engn, Shanghai, Peoples R China

来源：

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2011年 / 32卷 / 02期

基金：

国家高技术研究发展计划(863计划);

关键词：

Cr(VI) photocatalytic reduction; graphite; TiO2; TITANIA; FILMS;

D O I：

10.1080/01932691003656912

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 nanoparticles incorporated with carboxyl-modified graphite (Graphite-COOH) were prepared in a solvothermal process. By comparison with TiO2 nanoparticles (Degussa P25), the TiO2 nanoparticles incorporated with Graphite-COOH display higher photocatalytic activity with 98% of reduction efficiency of Cr(VI) ions after 1.5 hours ultraviolet (UV) irradiation. In order to investigate the effect of the graphite particles on the photocatalytic activity of TiO2 nanoparticles, diffuse reflectance UV-vis spectra (DRS), and photocurrent-potential curves were measured. The results indicate that the enhanced photocatalytic activity may be ascribed to the easier migration of photogenerated electrons to the TiO2 surface because of the introduction of graphite.

引用

页码：213 / 216

页数：4

共 13 条

[1] Highly stable CuO incorporated TiO2 catalyst for photocatalytic hydrogen production from H2O [J].

Bandara, J ;

Udawatta, CPK ;

Rajapakse, CSK .

PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 2005, 4 (11) :857-861

[2] Evidence of graphitic AB stacking order of graphite oxides [J].

Jeong, Hae-Kyung ;

Lee, Yun Pyo ;

Lahaye, Rob J. W. E. ;

Park, Min-Ho ;

An, Kay Hyeok ;

Kim, Ick Jun ;

Yang, Cheol-Woong ;

Park, Chong Yun ;

Ruoff, Rodney S. ;

Lee, Young Hee .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (04) :1362-1366

[3] Thermal stability of graphite oxide [J].

Jeong, Hae-Kyung ;

Lee, Yun Pyo ;

Jin, Mei Hua ;

Kim, Eun Sung ;

Bae, Jung Jun ;

Lee, Young Hee .

CHEMICAL PHYSICS LETTERS, 2009, 470 (4-6) :255-258

[4] Analysis of silver particles incorporated on TiO2 coatings for the photodecomposition of o-cresol [J].

Kuo, Yu-Lin ;

Chen, Hua-Wei ;

Ku, Young .

THIN SOLID FILMS, 2007, 515 (7-8) :3461-3468

[5] Visible light photodegradation of 4-chlorophenol with a coke-containing titanium dioxide photocatalyst [J].

Lettmann, C ;

Hildenbrand, K ;

Kisch, H ;

Macyk, W ;

Maier, WF .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 32 (04) :215-227

[6] Preparation and Photocatalysis Property of Exfoliated Graphite by In-situ Inserting Nano-TiO2 [J].

Li, Jihui ;

Gao, Jungang ;

Jia, Zhixin ;

Feng, Lili .

CATALYSIS LETTERS, 2009, 129 (1-2) :247-249

[7] Uniform carbon-covered titania and its photocatalytic property [J].

Lin, L ;

Lin, W ;

Zhu, YX ;

Zhao, BY ;

Xie, YC ;

He, Y ;

Zhu, YF .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2005, 236 (1-2) :46-53

[8] Synthesis and characterization of TiO2@C core-shell composite nanoparticles and evaluation of their photocatalytic activities [J].

Shanmugam, S ;

Gabashvili, A ;

Jacob, DS ;

Yu, JC ;

Gedanken, A .

CHEMISTRY OF MATERIALS, 2006, 18 (09) :2275-2282

[9] Femtosecond Visible-to-IR Spectroscopy of TiO2 Nanocrystalline Films: Elucidation of the Electron Mobility before Deep Trapping [J].

Tamaki, Yoshiaki ;

Hara, Kohjiro ;

Katoh, Ryuzi ;

Tachiya, M. ;

Furube, Akihiro .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (27) :11741-11746

[10] Photocatalytic degradation of phenol on MWNT and titania composite catalysts prepared by a modified sol-gel method [J].

Wang, WD ;

Serp, P ;

Kalck, P ;

Faria, JL .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 56 (04) :305-312

← 1 2 →