Synthesis of SrFexTi1-xO3-δ nanocubes with tunable oxygen vacancies for selective and efficient photocatalytic NO oxidation

被引:52
作者
Zhang, Qian [1 ]
Huang, Yu [2 ]
Peng, Shiqi [1 ]
Huang, Tingting [1 ]
Cao, Jun-ji [2 ]
Ho, Wingkei [3 ]
Lee, Shuncheng [4 ]
机构
[1] Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
[2] Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China
[3] Hong Kong Inst Educ, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China
[4] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
Oxygen vacancies; Fe substituted SrTiO3; Photocatalysis; Nitric oxide; In-Situ DRIFTS; NITRIC-OXIDE; TIO2; REMOVAL; SURFACE; FE; DEGRADATION; HYDROGENATION; NANOPARTICLES; ADSORPTION; REDUCTION;
D O I
10.1016/j.apcatb.2018.07.076
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
Oxygen vacancies of metal oxides play critical roles in turning activity and selectivity for many photocatalysis mediated reactions, yet the mechanism of NO oxidation on defect enriched photocatalyst surface is seldomly discussed. Herein, we provide detailed insight into the relationship between oxygen vacancy manipulation by extrinsic Fe3+ substitution in SrTiO3 host lattice and the photocatalytic performance of NO abatement. In particular, the hydrothermal synthesized SrFexTi1-xO3-delta nanocubes (denoted as SFTO-hyd sample) rather than the impregnated-post annealing sample, enabled oxygen vacancy formation, and promoted O-2 adsorption and superoxide anion radicals (center dot O-2(-)) formation. The SFTO-hyd (x = 5%) sample showed remarkably higher NO removal activity and selectivity under Xe lamp (lambda > 420 nm), in comparison with the pristine SrTiO3, P25 and impregnation-doped SFTO sample, underlining the important roles played by coexisted Fe3+ sites and oxygen vacancies. The in situ diffuse reflectance IR spectroscopy (DRIFTS) mechanically revealed that SrTiO3 provided Lewis acidic sites for NO dark adsorption and photoreaction with nitrates as final products; the substitutional Fe3+ sites provided more active sites for NO adsorption and photoreaction with enhanced number of radicals. This study deepens the understanding of photocatalytic NO abatement on defective surface, and may also provide a simple and cost effective strategy for synthesizing efficient and selective photocatalysts for environmental remediation.
引用
收藏
页码:1 / 9
页数:9
相关论文
共 45 条
  • [1] Nature and reactivity of the active species formed after NO adsorption and NO+O2 coadsorption on an Fe-containing zeolite
    Beltramone, AR
    Anunziata, OA
    [J]. CATALYSIS LETTERS, 2004, 92 (3-4) : 131 - 140
  • [2] Photocatalytic NOx abatement: why the selectivity matters
    Bloh, Jonathan Z.
    Folli, Andrea
    Macphee, Donald E.
    [J]. RSC ADVANCES, 2014, 4 (86) : 45726 - 45734
  • [3] Construction of a photocatalytic de-polluting field site in the Leopold II tunnel in Brussels
    Boonen, E.
    Akylas, V.
    Barmpas, F.
    Bottalico, L.
    Boreave, A.
    Cazaunau, M.
    Chen, H.
    Daele, V.
    De Marco, T.
    Doussin, J. F.
    Gaimoz, C.
    Gallus, M.
    George, C.
    Grand, N.
    Grosselin, B.
    Guerrini, G. L.
    Herrmann, H.
    Ifang, S.
    Kleffmann, J.
    Kurtenbach, R.
    Maille, M.
    Manganelli, G.
    Mellouki, A.
    Miet, K.
    Mothes, F.
    Moussiopoulos, N.
    Poulain, L.
    Rabe, R.
    Zapf, P.
    Beeldens, A.
    [J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2015, 155 : 136 - 144
  • [4] Low Valence Cation Doping of Bulk Cr2O3: Charge Compensation and Oxygen Vacancy Formation
    Carey, John J.
    Legesse, Merid
    Nolan, Michael
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (34) : 19160 - 19174
  • [5] Insight into the Effects of Fe Addition on the Local Structure and Electronic Properties of SrTiO3
    da Silva, Luis F.
    M'Peko, Jean-Claude
    Andres, Juan
    Beltran, Armando
    Gracia, Lourdes
    Bernardi, Maria I. B.
    Mesquita, Alexandre
    Antonelli, Eduardo
    Moreira, Mario L.
    Mastelaro, Valmor R.
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (09) : 4930 - 4940
  • [6] The effect of calcination temperature on the adsorption, of nitric oxide on Au-TiO2:: Drifts studies
    Debeila, MA
    Coville, NJ
    Scurrell, MS
    Hearne, GR
    [J]. APPLIED CATALYSIS A-GENERAL, 2005, 291 (1-2) : 98 - 115
  • [7] Removal of Nitric Oxide through Visible Light Photocatalysis by g-C3N4 Modified with Perylene Imides
    Dong, Guohui
    Yang, Liping
    Wang, Fu
    Zang, Ling
    Wang, Chuanyi
    [J]. ACS CATALYSIS, 2016, 6 (10): : 6511 - 6519
  • [8] Selected perovskite oxides: Characterization, preparation and photocatalytic properties-A review
    Grabowska, Ewelina
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2016, 186 : 97 - 126
  • [9] Catalytic NOx Abatement Systems for Mobile Sources: From Three-Way to Lean Burn after-Treatment Technologies
    Granger, Pascal
    Parvulescu, Vasile I.
    [J]. CHEMICAL REVIEWS, 2011, 111 (05) : 3155 - 3207
  • [10] GRATZEL M, 1990, J PHYS CHEM-US, V94, P2566, DOI 10.1021/j100369a064