Co-catalyst free SrTiO3 nano-cube for efficient photocatalytic hydrogen production

被引：14

作者：

Ganapathy, Mano ^{[1
,2
]}

Hsu, Yang ^{[2
]}

Thomas, Joy ^{[2
,3
]}

Chang, Chang Tang ^{[2
]}

Alagan, Viswanathan ^{[1
]}

机构：

[1] Anna Univ, Dept Phys, Univ Coll Engn, BIT Campus, Tiruchirappalli, Tamil Nadu, India

[2] Natl Ilan Univ, Dept Environm Engn, Yilan, Taiwan

[3] Natl Taiwan Univ, Dept Chem Engn, Taipei, Taiwan

来源：

JOURNAL OF MATERIALS SCIENCE | 2021年 / 56卷 / 34期

关键词：

STRONTIUM-TITANATE; HYDROTHERMAL SYNTHESIS; LIGHT; WATER; PHOTOLUMINESCENCE; NANOPARTICLES; FABRICATION; EVOLUTION; SPECTRUM;

D O I：

10.1007/s10853-021-06510-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co-catalyst free SrTiO3 was prepared by hydrothermal method and it's calcinated by different temperatures such as 300, 500, 700, and 900 degrees C to improve the photocatalytic hydrogen production. The SrTiO3 exhibits a cubic crystal structure which was revealed through X-ray diffraction (XRD) analysis. Scanning electron microscopy (SEM) images show the combination of nano spherical-needle morphology changed into nano-cubic morphology when the temperature varied from 300 to 900 degrees C. Further, transmission electron microscopy (TEM) result also confirms the nano-cubic crystal structure with well-resolved edges. The elemental mapping analysis shows the Sr, Ti, O elements were distributed uniformly in the prepared SrTiO3. The X-ray photoelectron spectroscopy (XPS) confirms the presence of chemical compositions and valance state of Sr, Ti, O elements in SrTiO3. The self-trapped excitons recombination of SrTiO3 was analyzed by photoluminescence (PL) analysis. The Electrochemical Impedance Spectroscopy (EIS) analysis of SrTiO3-900 degrees C shows the lowest electron transfer resistance which promotes effective charge separation. Among the different catalysts, SrTiO3-900 degrees C gives 6.8 mmol g(-1) h(-1) of hydrogen under Ultra-Violet irradiation.

引用

页码：18976 / 18988

页数：13

共 56 条

[1] A heterojunction strategy to improve the visible light sensitive water splitting performance of photocatalytic materials [J].