|Table of Contents|

Photocatalytic Removal of SO2 over Mn Doped Titanium Dioxide（Mn-TiO2）Supported by Multi-Walled Carbon Nanotubes（MWCNTs）(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2016年03期
Page:
21-
Research Field:
化学工程
Publishing date:

Info

Title:
Photocatalytic Removal of SO2 over Mn Doped Titanium Dioxide（Mn-TiO2）Supported by Multi-Walled Carbon Nanotubes（MWCNTs）
Author(s):
Zhi Jingtao1; Liu Hao2; Yu Xianqun3; Wang Jie2; Hao Jiangtao2; Yang Hongmin1
（1.School of Energy and Mechanical Engineering，Nanjing Normal University，Nanjing 210042，China）（2.China Urban Construction Design & Research Institute Co. Ltd.，Beijing，100120，China）（3.Qingdao Iron and Steel Group Co. Ltd.，Qingdao 266000，China）
Keywords:
MWCNTs/TiO2; Mn doping; desulfurization; photocatalytic oxidation
PACS:
TK01+8
DOI:
10.3969/j.issn.1672-1292.2016.03.004
Abstract:
In this paper，titanium dioxide supported by multi-walled carbon nanotubes（MWCNTs/TiO2），and Mn doped TiO2 supported by MWCNTs（MWCNTs/Mn-TiO2）are synthesized by a sol-gel method. Characterizations of these two prepared photocatalysts are analyzed by means of transmission electron microscopy（TEM），X-ray photoelectron spectroscopy（XPS），X-ray diffraction（XRD）and UV-Vis diffuse reflectance spectra（DRS）. The results show that MWCNTs and Mn dopants inhibit the grain growth of TiO2. The excellent optical properties in UV and visible region are both observed on 0.5% MWCNTs/Mn-TiO2. The photocatalytic oxidation and removal efficiency of SO2 from simulated flue gas are investigated experimentally in a fix-bed reactor. Removal efficiency of SO2 can reach 69% while using 0.5% MWCNTs/Mn-TiO2 as photocatalysts at the optimal conditions（155 mg/m3 SO2，8% O2，5% H2O）. The desulfurization efficiency is lower in the presence of NO due to the competition for adsorption sites between SO2 and NO. O2 and H2O play important roles in the photocatalytic oxidation of SO2. In addition，the possible reaction mechanism involved is also proposed here.

References:

［1］ SCHREIFELS J J，FU Y，WILSON E J. Sulfur dioxide control in China：policy evolution during the 10th and 11th five-year plans and lessons for the future［J］. Energy policy，2012，48：779-789.
［2］ PILLAI K C，CHUNG S J，RAJU T，et al. Experimental aspects of combined NOx and SO2 removal from flue-gas mixture in an integrated wet scrubber-electrochemical cell system［J］. Chemosphere，2009，76（5）：657-664.
［3］ LIU Y X，ZHANG J，SHENG C D，et al. Simultaneous removal of NO and SO2 from coal-fired flue gas by UV/H2O2 advanced oxidation process［J］. Chemical engineering journal，2010，162（3）：1 006-1 011.
［4］ JING L Q，XIN B F，YUAN F L，et al. Deactivation and regeneration of ZnO and TiO2 nanoparticles in the gas phase photocatalytic oxidation of n-C7H16 or SO2［J］. Applied catalysis A：general，2004，275：49-54.
［5］ SHANG J，ZHU Y F，DU Y G，et al. Comparative studies on the deactivation and regeneration of TiO2 nanoparticles in three photocatalytic oxidation systems：C7H16，SO2，and C7H16-SO2［J］. Journal of solid state chemistry，2002，166（2）：395-399.
［6］ ZHANG X W，WANG Y Z，LI G T. Effect of operating parameters on microwave assisted photocatalytic degradation of azo dye X-3B with grain TiO2 catalyst［J］. Journal of molecular catalysis A：chemical，2005，237：199-205.
［7］ YU J G，FAN J J，CHENG B. Dye-sensitized solar cells based on anatase TiO2 hollow spheres/carbon nanotube composite films［J］. Journal of power sources，2011，196（18）：7 891-7 898.
［8］ SAMPAIO M J，SILVA C G，MARQUES R R N，et al. Carbon nanotube-TiO2 thin films for photocatalytic applications［J］. Catal today，2011，161（1）：91-96.
［9］ WANG W D，SERP P，KALCK P，FARIA J L. Photocatalytic degradation of phenol on MWNT and titania composite catalysts prepared by a modified sol-gel method［J］. Applied catalysis B：environmental，2005，56（4）：305-312.
［10］ WANG H，WANG H L，JIANG W F，et al. Photocatalytic degradation of 2，4-dinitrophenol（DNP）by multi-walled carbon nanotubes（MWCNTs）/TiO2 composite in aqueous solution under solar irradiation［J］. Water research，2009，43（1）：204-210.
［11］ LIU S，CHEN Y S. Enhanced photocatalytic activity of TiO2 powders doped by Fe unevenly［J］. Catalysis communications，2009，10（6）：894-899.
［12］ ZHANG K J，XU W，LI X J，et al. Effect of dopant concentration on photocatalytic activity of TiO2 film doped by Mn non-uniformly［J］. Central european journal of chemistry，2006，4（2）：234-245.
［13］ PENG C，SNOOK G A，FRAY D J，et al. Carbon nanotube stabilised emulsions for electrochemical synthesis of porous nanocomposite coatings of poly［3，4-ethylene-dioxythiophene］［J］. Chemical communications，2006，44：4 629-4 631.
［14］ SANNINO D，VAIANO V，CIAMBELLI P，et al. Avoiding the deactivation of sulphated MnOx/TiO2 catalysts in the photocatalytic cyclohexane oxidative dehydrogenation by a fluidized bed photoreactor［J］. Applied catalysis A：general，2011，394：71-78.
［15］ GAO B，CHEN G Z，PUMA G L. Carbon nanotubes/titanium dioxide（CNTs/TiO2）nanocomposites prepared by conventional and novel surfactant wrapping sol-gel methods exhibiting enhanced photocatalytic activity application［J］. Applied catalysis B：environmental，2009，89（3-4）：503-509.
［16］ GRACIEN E B，SHEN J N，SUN X R，et al. Photocatalytic activity of manganese，chromium and cobalt-doped anatase titanium dioxide nanoporous electrodes produced by re-anodization method［J］. Thin solid films，2007，515（13）：5 287-5 297.
［17］ HUANG B C，YANG Y，CHEN X S，et al. Preparation and characterization of CdS-TiO2 nanoparticles supported on multi-walled carbon nanotubes［J］. Chemical communications，2010，11（9）：844-847.
［18］ XUE X X，JI W，MAO Z，et al. Effects of Mn doping on surface enhanced Raman scattering properties of TiO2 nanoparticles［J］. Spectrochimica acta part A molecular & biomolecular spectroscopy，2012，95：213-217.
［19］ WANG H Q，WU Z B，ZHAO W R，et al. Photocatalytic oxidation of nitrogen oxides using TiO2 loading on woven glass fabric［J］. Chemosphere，2007，66（1）：185-190.
［20］ LI S C，JACOBSON P，ZHAO S L，et al. Trapping nitric oxide by surface hydroxyls on rutile TiO2（110）［J］. The Journal of physical chemistry C，2012，116（2）：1 887-1 891.
［21］ LIANG H C，LI X Z，YANG Y H，et al. Effects of dissolved oxygen，pH，and anions on the 2，3-dichlorophenol degradation by photocatalytic reaction with anodic TiO2 nanotube films［J］. Chemosphere，2008，73（5）：805-812.
［22］ AO C H，LEE S C，ZOU S C，et al. Inhibition effect of SO2 on NOx and VOCs during the photodegradation of synchronous indoor air pollutants at parts per billion（ppb）level by TiO2［J］. Applied catalysis B：environmental，2004，49（3）：187-193.
［23］ ZHAO Y，ZHAO L，HAN J，et al. Study on method and mechanism for simultaneous desulfurization anddenitrification of flue gas based on the TiO2 photocatalysis［J］. Science in China，2008，51（3）：268-276.

Memo

Memo:
-
Last Update: 2016-09-30