A hydrothermal pathway for TiO2-rGO heterojunction nanocomposite to enhance hydrogen peroxide evolution

Tong Hoang Lin; Le Minh Huong; Che Quang Cong; Nguyen Thanh Hoai Nam; Nguyen Tan Thinh; Doan Thi Yen Oanh; Nguyen Huu Hieu

doi:10.15625/2525-2518/18365

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Authors

Tong Hoang Lin 1VNU-HCM, Key Laboratory of Chemical Engineering and Petroleum Processing (Key CEPP Lab), Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 2Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 3Vietnam National University Ho Chi Minh City (VNU-HCM), Linh Trung Ward, Thu Duc City, Viet Nam
Le Minh Huong 1VNU-HCM, Key Laboratory of Chemical Engineering and Petroleum Processing (Key CEPP Lab), Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 2Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 3Vietnam National University Ho Chi Minh City (VNU-HCM), Linh Trung Ward, Thu Duc City, Viet Nam
Che Quang Cong 1VNU-HCM, Key Laboratory of Chemical Engineering and Petroleum Processing (Key CEPP Lab), Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 2Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 3Vietnam National University Ho Chi Minh City (VNU-HCM), Linh Trung Ward, Thu Duc City, Viet Nam
Nguyen Thanh Hoai Nam 1VNU-HCM, Key Laboratory of Chemical Engineering and Petroleum Processing (Key CEPP Lab), Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 2Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 3Vietnam National University Ho Chi Minh City (VNU-HCM), Linh Trung Ward, Thu Duc City, Viet Nam
Nguyen Tan Thinh 1VNU-HCM, Key Laboratory of Chemical Engineering and Petroleum Processing (Key CEPP Lab), Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 2Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 3Vietnam National University Ho Chi Minh City (VNU-HCM), Linh Trung Ward, Thu Duc City, Viet Nam
Doan Thi Yen Oanh Publishing House for Science Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam
Nguyen Huu Hieu 1VNU-HCM, Key Laboratory of Chemical Engineering and Petroleum Processing (Key CEPP Lab), Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 2Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam 3Vietnam National University Ho Chi Minh City (VNU-HCM), Linh Trung Ward, Thu Duc City, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/18365

Keywords:

Titanium dioxide, Reduced graphene oxide, Band gap, Hydrogen peroxide

Abstract

In this study, titanium dioxide-reduced graphene oxide (TiO₂-rGO(TGO)) nanocomposite was synthesized via hydrothermal pathway. The characterization of the fabricated material revealed an efficient incorporation of the two constituents, as well as a notable decrease in the band gap energy of TGO compared to that of pristine TiO₂(2.62 versus 3.15 eV, respectively), which can expand the absorption spectrum of the catalyst towards the visible region. Electrochemical studies also elucidated the contribution of the rGO substrate in prolonging the recombination rate of charge carriers, signifying a noticeable enhancement in the photocatalytic capability of the TGO composite. Meanwhile, the hydrogen peroxide evolution performance of the synthesized photocatalyst was relatively promising with a concentration of up to 158.34 μM after 180 min. Along with further examinations additionally showing the plausible formation and participation of reactive oxygen radicals during the photocatalytic scheme, the TGO material indicates a good potential for several practical applications, especially the generation of hydrogen peroxide under light irradiation.

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