Enhanced photocatalytic activity in H2 production from methanol aqueous solution based on the synthesized Pt-TiO2-decorated MoSe2 nanocomposites

被引：12

作者：

Alshgari, Razan A. ^{[1
]}

Khan, Mohammad Rizwan ^{[1
]}

Mohandoss, Sonaimuthu ^{[2
]}

ALOthman, Zeid A. ^{[1
]}

Alotibi, Amerah M. ^{[1
]}

Alothman, Asma A. ^{[1
]}

Ahmad, Naushad ^{[1
]}

机构：

[1] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia

[2] YeungnO Univ, Sch Chem Engn, Gyongsan 38541, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 980卷

关键词：

MoSe2-NS; Pt-TiO2; Photocatalysis; Methanol; Visible light; H2; production; VISIBLE-LIGHT; HYDROGEN-PRODUCTION; TIO2; NANOPARTICLES; NANOTUBE ARRAYS; H-2; EVOLUTION; IN-SITU; NANOSHEETS; HETEROJUNCTION; HETEROSTRUCTURE; COMPOSITES;

D O I：

10.1016/j.jallcom.2024.173595

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, a simple hydrothermal method to synthesize a ternary nanocomposite of Pt-TiO2 decorated on MoSe2 as a photocatalyst for hydrogen (H2) evolution from an aqueous methanol solution. The -as prepared PtTiO2/MoSe2 nanocomposite were characterized by XRD, Raman spectra, electron microscopy (FE-SEM/Mapping and HR -TEM), XPS UV -Vis and PL analysis. XRD patterns confirmed the presence of MoSe2 and Pt-TiO2 crystal phases in the Pt-TiO2/MoSe2 nanocomposite. Raman spectra displayed characteristic peaks corresponding to MoSe out -of -plane vibration and Pt-TiO2 vibration modes, confirming the successful synthesis of Pt-TiO2/MoSe2 nanocomposite. FE -SEM images showed a sheet-like morphology for MoSe2-NS and spherical Pt/TiO2 particles, with MoSe2 sparsely scattered on the Pt-TiO2 surface with EDS mapping confirmed even element distribution of Pt-TiO2/MoSe2 nanocomposite. TEM images revealed the transparent nature of MoSe2-NS with well-resolved lattice fringes. Pt-TiO2 exhibited uniform dispersion of Pt nanoparticles on TiO2, and the Pt-TiO2/MoSe2 nanocomposite showed integration of MoSe2-NS with Pt-TiO2. HRTEM images confirmed the lattice fringes of MoSe2- NS, Pt, and TiO2 particles. Tauc plot measurements revealed optical band gaps of 2.99 eV for MoSe2-NS, 3.19 eV for Pt-TiO2, and 2.78 eV for Pt-TiO2/MoSe2. XPS analysis confirmed the presence of Mo, Se, Pt, Ti, O, and C elements in the Pt-TiO2/MoSe2 nanocomposite. Based on the photoelectrochemical measurements, the Pt-TiO2/ MoSe2 nanocomposite show the lower onset overpotential of 123 mV, which is much higher than Pt-TiO2 (179 mV) and MoSe2 (213 mV) at 10 mA/cm2. The photocatalytic efficiency of Pt-TiO2/MoSe2 nanocomposite in the context of H2 production through the enhancement of aqueous methanol under visible light exposure was assessed across different factors. Among these, the Pt-TiO2/MoSe2 nanocomposite exhibited the highest photoactivity in H2 production at 1337 mu molg  1 after 4 h. These results show the promising potential of the Pt-TiO2/ MoSe2 nanocomposite catalyst in addressing both environmental and energy challenges in the future.

引用

页数：14

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