Influential Factors of La-doped Calcium Titanate for Photocatalytic H2 Evolution Under Visible Light †

doi:10.7503/cjcu20190644

Abstract

Abstract:

For photocatalytic H ₂ evolution from water splitting, perovskite photocatalyst Ca _0.99La _0.01TiO ₃ was prepared by sol-gel method with citric acid as complexing agent. The influence of N doping on photocatalytic activity was investigated. The hydrogen-producing capacity of Ca _0.99La _0.01TiO _3- _xN _x with different Pt loading and different kinds of sacrificial agents was also investigated under visible light irradiation. The photocatalytic materials were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), UV-Vis diffuse reflectance spectroscopy(UV-Vis DRS). The results show that under the irradiation of visible light, the perovskite photocatalyst Pt-Ca _0.99La _0.01TiO _3- _xN _x with 1% Pt-loading has the highest photocatalytic activity of hydrogen production from water when Na ₂SO ₃/Na ₂S is used as the sacrificial agent. Pt-loading promotes photocatalytic reaction and improves photocatalytic activity.

Key words: Photocatalysis, Perovskite, Pt-loading, Sacrificial agent

CLC Number:

O644

TrendMD:

CHENG Rongmin,XU Hong,SHAN Ruiping,ZHAN Conghong. Influential Factors of La-doped Calcium Titanate for Photocatalytic H₂ Evolution Under Visible Light ^†[J]. Chem. J. Chinese Universities, 2020, 41(6): 1345.

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References 23

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Photocatalyst	Sacrificial agent	H₂ evolution/(μmol·g^-1)
Ca_0.99La_0.01TiO₃	HCHO	0
	Na₂SO₃/Na₂S	0
Ca_0.99La_0.01TiO_3-_xN_x	HCHO	11.99
	Na₂SO₃/Na₂S	0

Photocatalyst	Sacrificial agent	H₂ evolution/(μmol·g^-1)
Ca_0.99La_0.01TiO₃	HCHO	0
	Na₂SO₃/Na₂S	0
Ca_0.99La_0.01TiO_3-_xN_x	HCHO	11.99
	Na₂SO₃/Na₂S	0

Influential Factors of La-doped Calcium Titanate for Photocatalytic H₂ Evolution Under Visible Light ^†

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