Preparation of the Novel CdS/TiO2 Nanocomposites and Its Visible-light Photocatalytic Properties

doi:10.7517/j.issn.1674-0475.2008.06.489

Abstract

Abstract: A novel CdS/TiO₂ nanocomposites were prepared respectively by impregnation and hy-drothermal reaction,and the structure and morphology of the samples were characterized by Trans-mission electron microscope (TEM),X-ray diffraction (XRD),UV-Vis absorption spectra (UV-VIS),Electron spin resonance (ESR) et al.The results obtained by X-ray diffraction (XRD) and Transmission electron microscope(TEM) showed that the particles of the novel nanocomposites are small and uniformly dispersed,CdS composited TiO₂ materials consisted of anatase with highly dis-persed cubic and hexagonal phase.The results of photocatalytic degradation of the brilliant X-3B in the visible light irradiation indicated that the novel CdS/TiO₂ was greatly improved compared CdS/TiO₂ prepared directly.The formation of a large number of single electron bound oxygen vacances and the strong electronic interaction between CdS and TiO₂ are the main reason for the visible-light photocatalytic activity of the novel CdS/TiO₂.

Key words: novel nanocomposites, CdS/TiO₂, single electron oxygen vacancy, visible-light photo-catalysis

CLC Number:

XU Zhan-xia, CUI Guan-jun, ZHANG Min, YANG Jian-jun. Preparation of the Novel CdS/TiO₂ Nanocomposites and Its Visible-light Photocatalytic Properties[J]. Imaging Science and Photochemistry, 2008, 26(6): 489-498.

References

[1] 李晓平,徐宝琨,刘国范,等.纳米TiO₂光催化降解水中有机污染物的研究与发展[J].功能材料,1999,30(3):242-248.Li X P,Xu B K,Liu G F,et al.The research and development of photocatalytic degradation of organic contaminant over nanosized TiO₂ in water[J].Functional Materials,1999,30 (3):242-248.
[2] 王晓冬,金振声,张治军.纳米管钛酸纳及其衍生物[J].化学进展,2006,18(9):1208-1217.Wang X D,Jin Z S,Zhang Z J.Nanotube sodium titsnate and its derivatives[J].Progress in Chemistry,2006,18 (9):1208-1217.
[3] 冯彩霞,金振声,杨建军,等.CdS镶嵌的纳米管钛酸的制备及其光催化性能研究[J].感光科学与光化学(影像科学与光化学),2004,22(4):272-276.Feng C X,Jin Z S,Yang J J,et al.Preparation of CdS inserted nanotubed titanic acid and its photocatalytic property[J].Photographic Science and Photochemistry(Imaging Science and Photochemistry),2004,22(4):272-276.
[4] Hodos M,Horvath E,Haspel H,et al.Photosensitization of ion-exchangeable titsnate nanotubes by CdS nanoparticles[J].Chem.Phys.Lett.,2004,399(4-6):512-515.
[5] Li H,Zhu BL,Feng Y F,et al.Synthesis,characterization of TiO₂ nanotubes-supported MS(TiO₂NTs@MS,M=Cd,Zn)and their photocatalytic activity[J].J.Solid State Chem.,2007,180(7):2136-2142.
[6] Yang J J,Jin Z S,Wang X D,et al.Study on composition structure and formation process of nanotube Na₂TiO₄ (OH)2[J].Dalton Trans.,2003,20:3898-3901.
[7] 丘永梁,陈洪龄,徐南平,等.水热法制备CdS/TiO₂及其光活性[J].化工学报,2005,56(7):1339-1342.Qiu Y L,Chen H L,Xu N P,et al.Preparation of CdS/TiO₂ by hydrothermal method and its photocatalytic activity[J].Journal of Chemical Industry and Engineering,2005,56(7):1339-1342.
[8] Zhang M,Jin Z S,Zhang J W,et al.Effect of annealing temperature on morphology,structure and photocatalytic behavior of nanotubed H₂Ti₂O₄(OH)₂[J].J.Mol.Catal.A:Chem.,2004,217(1-2):203-210.
[9] Armstrong N R,Quinn R K.Auger and X-ray photoelectron spectroscopic and electrochemical charactetization of titanium thin film electrodes[J].Surf.Sci.,1977,67(2):451-468.
[10] Sayers C N,Armstrong N R.X-ray photoelectron spectroscopy of TiO₂ and other titanate electrodes and various standard Titanium oxide materials:Surface compositional changes of the TiO₂ electrode during photoelectrolysis[J].Surf.Sci.,1978,77(2):301-320.
[11] Wu L,Yu J C,Zhang L Z,et al.Preparation of a highly active nanocrystalline TiO₂ photocatalyst from titanium oxo cluster precursor[J].J.Solid State Chem.,2004,177(7):2584-2590.
[12] Wang W Z,Liu Z H,Zheng C L,et al.Synthesis of CdS nanoparticles by a novel and simple one-step,solid-state reaction in the presence of a nonionic surfactant[J].Mater.Lett.,2003,57(18):2755-2760.
[13] Rong M Z,Zhang M Q,Liang H C,et al.Surface modification and particles size distribution control in nano-CdS/polystyrene composite film[J].Chem.Phys.,2003,286(2-3):267-276.
[14] Nakamura I,Negishi N,Kutsuna S,et al.Role of oxygen vacancy in the plasma-treated TiO₂ photocatalyst with visible light activity for NO removal[J].J.Mol.Catal.A:Chem.,2000,161(1-2):205-212.
[15] Nakaoka Y,Nosaka Y.Electron spin resonance study of radicals produced on irradiated CdS powder[J].J.Phys.Chem.,1995,99(24):9893-9897.
[16] Serwicka E.ESR study on the interaction of water vapour with polycrystalline TiO₂ under illumination[J].Colloids Surf.,1985,13:287-293.
[17] Li Q Y,Zhang J W,Jin Z S,et al.n/p-Type changeable semiconduetor TiO₂ prepared from NTA[J].Electrochem.Commun.,2006,8(5):741-746.
[18] 李秋叶,金振声,张顺利,等.真空100℃热处理对纳米管钛酸荧光性质的影响[J].光谱学与光谱分析,2005,25(12):2044-2047.Li Q Y,Jin Z S,Zhang S L,et al.Effect of thermal treatment of nanotubed H₂Ti₂O₄ (OH)₂ on photolumiescence properties[J].Spectroscopy and Spectral Analysis,2005,25(12):2044-2047.
[19] Wu L,Yu J C,Fu X Z,et al.Characterization and photocatalytic mechanism of nanosezed CdS coupled TiO₂ nanocrystals under visible light radiation[J].J.Mol.Catal.A:Chem.,2006,244(1-2):25-32.
[20] Jang J S,Li W,Oh S H,et al.Fabrication of CdS/TiO₂ nano-bulk composite photocatalysts for hydrogen production from aqueous solution H₂S under visible light[J].Chem.Phys.Lett.,2006,425(4-6):278-282.
[21] Jang J S,Ji S M,Bae S W,et al.Optimization of CdS/TiO₂ nano-bulk composite photocatalysts NaS/Na₂SO₃ aqueous electrolyte for hydrogen production from solution under visible light (λ≥420nm)[J].J.Photochem.Photobio.A:Chem.,2007,188(1):112-119.
[22] 杨晶,施利毅,张仲燕,等.活性艳红X-3B氧化脱色的研究[J].上海大学学报(自然科学版),1998,4(5):586-590.Yang J,Shi L Y,Zhang Z Y,et al.Study on the decolourization of active red X-3B[J].Journal of Shang Hai University (Natural Science),1998,4(5):586-590.

Preparation of the Novel CdS/TiO₂ Nanocomposites and Its Visible-light Photocatalytic Properties

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 1

Recommended Articles

Metrics

Comments