Photocatalytic hydrogen evolution over surface-modified titanate nanotubes by 5-aminosalicylic acid decorated with silver nanoparticles

被引：11

作者：

Barbierikova, Zuzana ^{[1
]}

Loncarevic, Davor ^{[2
]}

Papan, Jelena ^{[3
]}

Vukoje, Ivana D. ^{[3
]}

Stoiljkovic, Milovan ^{[3
]}

Ahrenkiel, S. Phillip ^{[4
]}

Nedeljkovic, Jovan M. ^{[3
]}

机构：

[1] Slovak Univ Technol Bratislava, Inst Phys Chem & Chem Phys, Fac Chem & Food Technol, Radlinskeho 9, SK-81237 Bratislava 10, Slovakia

[2] Univ Belgrade, Inst Chem Technol & Met, Dept Catalysis & Chem Engn, Njegoseva 12, Belgrade 11000, Serbia

[3] Univ Belgrade, Vinca Inst Nucl Sci, Natl Inst Republ Serbia, POB 522, Belgrade 11001, Serbia

[4] South Dakota Sch Mines & Technol, 501 E St Joseph St, Rapid City, SD 57701 USA

来源：

ADVANCED POWDER TECHNOLOGY | 2020年 / 31卷 / 12期

关键词：

Hydrogen production; Titanate nanotubes; Interfacial charge-transfer complex; Spin trapping EPR experiments; H-2; PRODUCTION; AU/TIO2; PHOTOCATALYSTS; AQUEOUS SUSPENSION; TIO2; WATER; DYE; 4-CHLOROPHENOL; DEGRADATION; TEMPERATURE; GENERATION;

D O I：

10.1016/j.apt.2020.11.001

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The efficiency of titanate-nanotubes-based photocatalysts towards hydrogen production was studied in the presence of the sacrificial agent, 2-propanol. The highest hydrogen production rate (similar to 120 mu mol h(-1) g(-1)) was observed over surface-modified titanate nanotubes by 5-amino salicylic acid decorated with nanometer-sized silver nanoparticles. The X-ray diffraction analysis, transmission electron microscopy, nitrogen adsorption-desorption isotherms, and diffuse reflection spectroscopy were applied to characterize the prepared photocatalytic materials. The better photocatalytic performance of inorganic-organic hybrid materials in comparison to the pristine titanate nanotubes is a consequence of their improved light-harvesting ability due to the formation of interfacial charge transfer (ICT) complex, as well as the presence of metallic silver nanoparticles that suppress the recombination of photo-generated charge carriers. The spin trapping EPR experiments under irradiation of prepared photocatalysts with either UV or visible light were used to monitor the appearance of hydroxyl radicals and superoxide radical anions. The generation of superoxide radical anions under visible light irradiation was detected for hybrid materials, but not for the pristine titanate nanotubes. These results are a consequence of enhanced promotion of electrons to the conduction band due to extended absorption in visible spectral range in hybrids and support the higher efficiency of hydrogen generation observed for surface-modified titanate nanotubes by 5 amino salicylic acid decorated with silver nanoparticles. (c) 2020 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：4683 / 4690

页数：8

共 60 条

[11] Enhanced surface electron transfer by fabricating a core/shell Ni@NiO cluster on TiO2 and its role on high efficient hydrogen generation under visible light irradiation [J].