Influence of heat treatment on thermally-reduced graphene oxide/TiO2 composites for photocatalytic applications

Thuy-Duong Nguyen-Phan; Viet Hung Pham; Hyunran Yun; Eui Jung Kim; Seung Hyun Hur; Jin Suk Chung; Eun Woo Shin

Korean Journal of Chemical Engineering, Vol.28, No.12, 2236-2241, December, 2011

DOI10.1007/s11814-011-0123-4 Export Citation

Influence of heat treatment on thermally-reduced graphene oxide/TiO2 composites for photocatalytic applications

Thuy-Duong Nguyen-Phan, Viet Hung Pham, Hyunran Yun, Eui Jung Kim , Seung Hyun Hur , Jin Suk Chung , and Eun Woo Shin^†

School of Chemical Engineering and Bioengineering, University of Ulsan, Daehakro 93, Nam-gu, Ulsan 680-749, Korea

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Thermally-reduced graphene oxide/TiO2 composites (TRGO/Ti) were prepared by the thermal reduction of graphene oxide/TiO2 composite that was obtained from a simple, environmentally friendly, one-step colloidal blending method. The changes in structural and textural properties as well as their corresponding photocatalytic activities were investigated as a function of calcination temperature. The presence of stacked TRGO sheets significantly retarded both the aggregation and the crystalline phase transformation of TiO2 as increasing the temperature from 200 to 600 ℃. TRGO/Ti composites exhibited higher photocatalytic activity for the degradation of methylene blue in comparison with pure TiO2 due to the increase in specific surface area and the formation of π-π conjugations between dye compounds and aromatic regions of TRGO. However, increasing the calcination temperature resulted in the lower photoactivity and slower kinetics, which can be ascribed to the decrease in surface area, the reduction of oxygen vacancies, and the loss of functional groups at the edges or on the basal planes of the TRGO sheets.

Keywords:TiO2;Reduced Graphene Oxide;Nanocomposites;Dye;Photocatalytic Degradation;Porous Materials

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[2] Linsebigler AL, Lu GQ, Yates JT, Chem. Rev., 95(3), 735 (1995)

[3] Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69 (1995)

[4] Chen X, Mao SS, Chem. Rev., 107(7), 2891 (2007)

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[9] Lam SM, Sin JC, Mohamed AR, Korean J. Chem. Eng., 27(4), 1109 (2010)

[10] Akhavan O, Ghaderi E, J. Phys. Chem. C., 113, 20214 (2009)

[11] Zhang H, Lv X, Li Y, Wang Y, Li J, ACS Nano., 4, 380 (2010)

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[13] Wang YJ, Shi R, Lin J, Zhu YF, Appl. Catal. B: Environ., 100(1-2), 179 (2010)

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[15] Katsnelson MI, Mater. Today., 10, 20 (2007)

[16] Geim AK, Novoselov KS, Nat. Mater., 6, 183 (2007)

[17] Stoller MD, Park S, Zhu Y, An J, Ruoff RS, Nano Lett., 8, 3498 (2008)

[18] Blake P, Brimicombe PD, Nair RR, Booth TJ, Jiang D, Schedin F, Ponomarenko LA, Morozov SV, Gleeson HF, Hill EW, Geim AK, Novoselov KS, Nano Lett., 8, 1704 (2008)

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[20] Lambert TN, Chavez CA, Hernandez-Sanchez B, Lu P, Bell NS, Ambrosini A, Friedman T, Boyle TJ, Wheeler DR, Huber DL, J. Phys. Chem. C., 113, 19812 (2009)

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[22] Wang P, Zhai Y, Wang D, Dong S, Nanoscale., 3, 1640 (2011)

[23] Hummers WS, Offeman RE, J. Am. Chem. Soc., 80, 1339 (1958)

[24] Pham VH, Cuong TV, Hur SH, Shin EW, Kim JS, Chung JS, Kim EJ, Carbon., 48, 1945 (2010)

[25] Stankovich S, Dikin DA, Piner RD, Kohlhaas KA, Kleinhammes A, Jia Y, Wu Y, Nguyen ST, Ruoff RS, Carbon., 45, 1558 (2007)

[26] Yu J, Yu JC, Ho W, Jiang Z, New J. Chem., 26, 607 (2002)

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[30] Houas A, Lachheb H, Ksibi M, Elaloui E, Guillard C, Herrmann JM, Appl. Catal. B: Environ., 31(2), 145 (2001)

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[32] Yao Y, Li G, Ciston S, Lueptow RM, Gray KA, Environ. Sci. Technol., 42, 4952 (2008)

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