Article

Adsorption-Photocatalytic Synergistic Removal of Toluene Vapor in Air on ZSM-5-TiO2 Composites

  • Cao Yanfeng ,
  • Wang Jinguo ,
  • Qiao Jieqiong ,
  • Wan Huixin ,
  • Li Hexing ,
  • Zhu Jian
Expand
  • a Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Normal University, Shanghai 200234, China;
    b Shanghai Pharmaceutical Holdings Co., Ltd, Central Research Institute, Shanghai 201203, China

Received date: 2012-11-20

  Online published: 2013-01-25

Supported by

Project supported by the National Natural Science Foundation of China (Nos. 20825724, 20907032, 20937003).

Abstract

As we all know, titanium dioxide (TiO2) is one of the most promising photocatalysts for degradation of toxic volatile organic compounds (VOC) ideally under environmentally friendly conditions. While H-ZSM-5 zeolites are commonly used in industrial catalysis as an important adsorbent or host material. This paper mainly focused on designing TiO2-sorbent hybrid photocatalytic materials, especially those supported on ZSM-5 zeolites, with the objective of fabricating efficient photodegradation systems toward organic compounds diluted in air. ZSM-5-TiO2 composites were fabricated by an impregnation method. First, the TiO2 nanocrystals with diameter about 5 nm were prepared by solvothermal process. Next, these TiO2 nanocrystals were loaded on the ZSM-5 zeolites through impregnating at a relatively low temperature about 150 ℃. The obtained samples were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. The fundamental adsorption- photocatalytic behaviors were investigated in the removal of toluene vapor diluted in air. In the case of hybrid photocatalysts, the initial toluene concentration in gas phase was significantly reduced because of adsorption into the ZSM-5. After photo-irradiation started, toluene was continuously decomposed. The results found that TiO2 nanocrystals were uniformly distributed on the surface of ZSM-5 zeolites by using of impregnation method. Simultaneously the synergistic effects between adsorption properties and photocatalysis were discussed in this paper, as well as the structure-activity relationship. The weight ratio of TiO2 and SiO2/Al2O3 ratio of the ZSM-5-TiO2 composites will significantly affect hydrophobicity index (HI), adsorption and photocatalytic efficiency. The effect of the amount of the adsorbent on the photocatalytic activity was investigated and provided a novel physicochemical insight into adsorption-photocatalytic synergistic removal of organic pollutants. The present study affords a fundamental understanding of hybrid materials of TiO2 and ZSM-5 zeolite, highlighting an enhancement of photocatalytic activity of supported TiO2 on such adsorbed materials.

Cite this article

Cao Yanfeng , Wang Jinguo , Qiao Jieqiong , Wan Huixin , Li Hexing , Zhu Jian . Adsorption-Photocatalytic Synergistic Removal of Toluene Vapor in Air on ZSM-5-TiO2 Composites[J]. Acta Chimica Sinica, 2013 , 71(04) : 567 -572 . DOI: 10.6023/A12110942

References

[1] Maciuca, A.; Dupeyrat, C. B.; Tatibouët, J. M. Appl. Catal. B: Environ. 2012, 125, 432.

[2] Zhao, S.; Ramakrishnan, G.; Su, D.; Rieger, R.; Koller, A.; Orlov, A. Appl. Catal. B: Environ. 2011, 104, 239.

[3] Long, C.; Liu, P.; Li, Y.; Li, A.-M.; Zhang, Q.-X. Environ. Sci. Technol. 2011, 45, 4506.

[4] Inumaru, K.; Yasui, M.; Kasahara, T.; Yamaguchi, K.; Yasuda, A.; Yamanaka, S. J. Mater. Chem. 2011, 21, 12117.

[5] Zhang, Y.-M.; Qiao, Z.-A.; Li, Y.-T.; Liu, Y.-L.; Huo, Q. S. J. Mater. Chem. 2011, 21, 17283.

[6] Kilic, N.; Ballantine, J. A. Analyst 1998, 123, 1795.

[7] Walcarius, A.; Mercier, L. J. Mater. Chem. 2010, 20, 4478.

[8] Wu, Z.-X.; Zhao, D.-Y. Chem. Commun. 2011, 47, 3332.

[9] Sato, K.; Hirakawa, T.; Komano, A.; Kishi, S.; Nishimoto, C. K.; Mera, N.; Kugishima, M.; Sano, T.; Ichinose, H.; Negishi, N.; Seto, Y.; Takeuchi, K. Appl. Catal. B: Environ. 2011, 106, 316.

[10] Hoffman, M. R.; Martin, S. T.; Choi, W.; Bahnemann, D. W. Chem. Rev. 1995, 95, 69.

[11] Halaoui, L. I.; Abrams, N. M.; Mallouk, T. E. J. Phys. Chem. B 2005, 9, 6334.

[12] Fujishima, A.; Zhang, X.-T. Compt. Rend. Chim. 2006, 9, 50.

[13] Stock, N. L.; Peller, J.; Vinodgopal, K.; Kamat, P. V. Environ. Sci. Technol. 2000, 34, 1747.

[14] Peller, J.; Wiest, O.; Kamat, P. V. Environ. Sci. Technol. 2003, 37, 1926.

[15] Cui, Y.-L.; Cao, C.-C.; Zuo, J.-X. Water Sci. Eng. Technol. 2011, 4, 76. (崔赟璐, 曹长春, 左金星, 水科学与工程技术, 2011, 4, 76.)

[16] Sun, H.-Q.; Ullah, R.; Chong, S.; Ang, H. M.; Tadé, M. O.; Wang, S. B. Appl. Catal. B: Environ. 2011, 108-109, 127.

[17] Connelly, K. A.; Idriss, H. Green Chem. 2012, 14, 260.

[18] Torimoto, T.; Ito, S.; Kuwabata, S.; Yoneyama, H. Environ. Sci. Technol. 1996, 30, 1275.

[19] Kuwahara, Y.; Kamegawa, T.; Mori, K.; Yamashita, H. Chem. Commun. 2008, 4783.

[20] Kuwahara, Y.; Yamashita, H. J. Mater. Chem. 2011, 21, 2407.

[21] Kuwahara, Y.; Aoyama, J.; Miyakubo, K.; Eguchi, T.; Kamegawa, T.; Mori, K.; Yamashita, H. J. Catal. 2012, 285, 223.

[22] Takeuchi, M.; Hidaka, M.; Anpo, M. J. Hazard. Mater. 2012, 237-238, 133.

[23] Guo, P.; Liu, C.-Y.; Gao, M.; Wang, X.-S.; Guo, H.-C. Chin. J. Catal. 2010, 31, 573. (郭鹏, 刘春燕, 高敏, 王祥生, 郭洪臣, 催化学报, 2010, 31, 573.)

[24] Zhang, W.-J.; Yu, Y.; Li, K.-X. Funct. Mater. 2012, 43, 1308. (张文杰, 于杨, 李可心, 功能材料, 2012, 43, 1308.)

[25] Castillo, R.; Koch, B.; Ruiz, P.; Delmon, B. J. Catal. 1996, 161, 524.
Outlines

/