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Sol gel preparation of a novel χLa2Ti2O7 /HZSM-5 composite photocatalyst

WENJIE ZHANG1,* , YUXUAN LIU1, LING DU1

Affiliation

  1. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China

Abstract

A sol-gel method was used to prepare χLa2Ti2O77/HZSM-5 composite using HZSM-5 zeolite as the support. La2Ti2O7 is in the layered perovskite structure after loading. Crystallite size of La2Ti2O7 shrinks slightly with decreasing loading percentage . Surface area and total pore volume of χLa2Ti2O77/HZSM-5 significantly increase with raising HZSM-5 content. The bandgap energies are 3.29, 3.55, 3.61, 3.63 and 3.73 eV for bare La2Ti2O7 and the composites containing 90%, 70%, 50% and 20% La2Ti2O7. The chemical environments of La, Ti and O in La2Ti2O7 do not n oticeably change after loading. 34.8% of the initial RBR X3B is degraded on 70%La2Ti2O7/HZSM-5 after 30 min of irradiation, while only 6.4% of the dye is degraded on the bare La2Ti2O7.

Keywords

La2Ti2O7, Photocatalytic, HZSM-5, Support.

Citation

WENJIE ZHANG, YUXUAN LIU, LING DU, Sol gel preparation of a novel χLa2Ti2O7 /HZSM-5 composite photocatalyst, Optoelectronics and Advanced Materials - Rapid Communications, 12, 3-4, March-April 2018, pp.222-226 (2018).

Submitted at: Jan. 11, 2017

Accepted at: April 5, 2018