Modified blue TiO2 nanostructures for efficient photo-oxidative removal of harmful NOx gases

Hao Huy Nguyen; Gobinda Gyawali; Adriana Martinez-Oviedo; Hoang Phuc Nguyen; Soo Wohn Lee

Korean Journal of Chemical Engineering, Vol.37, No.9, 1507-1514, September, 2020

DOI10.1007/s11814-020-0560-z Export Citation

Modified blue TiO2 nanostructures for efficient photo-oxidative removal of harmful NOx gases

Hao Huy Nguyen, Gobinda Gyawali^{1, †}, Adriana Martinez-Oviedo², Hoang Phuc Nguyen³, and Soo Wohn Lee^{2, †}

Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
¹Department of Fusion Science and Technology, Sun Moon University, Asan 31460, Korea
²Department of Environmental and Bio-chemical Engineering, Sun Moon University, Asan 31460, Korea
³Research Center for Eco-Multifunctional Nano Materials, Sun Moon University, Asan 31460, Korea

E-mail:,

Blue TiO2 nanostructures were produced via Lithium/ethylenediamine (Li/EDA) reduction method and applied for photo-oxidative removal of harmful NOx gases under simulated solar light irradiation. Blue TiO2 possesses some unique physicochemical properties such as enhanced visible-light absorption, superficial defects or oxygen vacancies, and the evolution of Ti3+ species. Moreover, the photoluminescence spectra (PL) revealed the efficient separation of photoinduced electron-hole pairs in the modified blue TiO2 nanostructures, enhancing their photocatalytic activities. The results indicated that the blue TiO2 nanostructures exhibited the highest performance towards photo-oxidation of NOx gases, with an efficiency of 72.6% under simulated solar light irradiation.

Keywords:Photocatalyst;Blue TiO2;Oxygen Vacancy;NOx Gas

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[1] Angelo J, Andrade L, Madeira LM, Mendes A, J. Environ. Manage., 129, 522 (2013)

[2] Mauzerall DL, Sultan B, Kim N, Bradford DF, Atmos. Environ., 39, 2851 (2005)

[3] Chaloulakou A, Mavroidis I, Gavriil I, Atmos. Environ., 42, 454 (2008)

[4] Whyand T, Hurst JR, Beckles M, Caplin ME, Respir. Res., 19, 79 (2018)

[5] Yacoubi B, Samet L, Bennaceur J, Lamouchi A, Chtourou R, Mater. Sci. Semicond. Process, 30, 361 (2015)

[6] Muneer S, Lee JH, Sci. Rep., 8, 12291 (2018)

[7] Locci C, Vervisch L, Farcy B, Domingo P, Perret N, Flow Turbulence Combust., 100, 301 (2018)

[8] Barman S, Philip L, Environ. Sci. Technol., 40, 1035 (2006)

[9] Martinez-Oviedo A, Ray SK, Nguyen HP, Lee SW, J. Photochem. Photobiol. A-Chem., 370, 18 (2019)

[10] Nguyen HP, Matsuoka M, Kim TH, Lee SW, J. Photochem. Photobiol. A-Chem., 367, 429 (2018)

[11] Zhang K, Wang L, Kim JK, Ma M, Veerappan G, Lee CL, Kong K, Lee H, Park JH, Energy Environ. Sci., 9, 499 (2016)

[12] Nguyen HH, Gyawali G, Kim TH, Humam SB, Lee SW, Prog. Nat. Sci. Mater. Int., 28, 548 (2018)

[13] Humam SB, Nguyen HH, Regmi C, Gyawali G, Joshi B, Lee SW, Ceram. Int., 45, 4230 (2019)

[14] Yan Y, Hao B, Wang D, Chen G, Markweg E, Albrecht A, Schaaf P, J. Mater. Chem. A, 1, 14507 (2013)

[15] Kim Y, Hwang HM, Wang L, Kim I, Yoon Y, Lee H, Sci. Rep., 6, 25212 (2016)

[16] Yang J, Zheng C, Xiong P, Li Y, Wei M, J. Mater. Chem. A, 2, 19005 (2014)

[17] Lu X, Wang G, Zhai T, Yu M, Gan J, Tong Y, Li Y, Nano Lett., 12, 1690 (2012)

[18] Ri CN, Kim SG, Jong JY, Pak SN, Ri SC, Ri JH, New J. Chem., 42, 647 (2018)

[19] Zhu J, He J, Hu L, Da L, J. Solid State Chem., 276, 104 (2019)

[20] Nguyen HH, Gyawali G, Lee SW, J. Ceram. Process. Res., 17, 409 (2016)

[21] Ao CH, Lee SC, Appl. Catal. B: Environ., 44(3), 191 (2003)

[22] Cao JW, Zhang JY, Dong XA, Fu HL, Zhang XM, Lv XS, Li YH, Jiang GM, Appl. Catal. B: Environ., 249, 266 (2019)

[23] Xu MX, Wang YH, Geng JF, Jing DW, Chem. Eng. J., 307, 181 (2017)

[24] Jiang GM, Li XW, Lan MN, Shen T, Lv XS, Dong F, Zhang S, Appl. Catal. B: Environ., 205, 532 (2017)

[25] Jiang GM, Cao JW, Chen M, Zhang XM, Dong F, Appl. Surf. Sci., 458, 77 (2018)

[26] Hu Y, Song X, Jiang SM, Wei CH, Chem. Eng. J., 274, 102 (2015)

[27] Dalton JS, Janes PA, Jones NG, Nicholson JA, Hallam KR, Allen GC, Environ. Pollut., 120, 415 (2002)

[28] Yu QL, Brouwers HJH, Appl. Catal. B: Environ., 92(3-4), 454 (2009)

[29] Hu Y, Song X, Jiang SM, Wei CH, Chem. Eng. J., 274, 102 (2015)