Photocatalytic properties of SnO2/MoO3 mixed oxides and their relation to the electronic properties and surface acidity

被引：29

作者：

Assis, G. C. ^{[1
]}

Silva, I. M. A. ^{[1
]}

Dos Santos, T. V. ^{[1
]}

Meneghetti, M. R. ^{[1
]}

Meneghetti, S. M. P. ^{[1
]}

机构：

[1] Univ Fed Alagoas, Inst Chem & Biotechnol, Grp Catalysis & Chem React, Av Lourival Melo Mota S-N, BR-57072970 Maceio, AL, Brazil

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2021年 / 407卷

关键词：

Photodegradation; Photo; Catalyst; Tin; Molybdenum; Mixed oxides; CATALYTIC-PROPERTIES; RAMAN-SPECTROSCOPY; MOLYBDENUM OXIDE; DYE DEGRADATION; RHODAMINE-B; SOLID ACIDS; SNO2; MOO3; TIO2; FILMS;

D O I：

10.1016/j.jphotochem.2020.113035

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：

The wet impregnation method was used to synthesize SnO2/MoO3 heterojunctions containing different amounts of Mo (5, 25 and 50 wt%). The materials obtained were characterized and their photocatalytic properties were evaluated in the photodegradation of methylene blue (MB) dye. The presence of superficial Lewis and Bmnsted acid sites enhanced in photocatalytic efficiency of the materials. The order of photocatalytic activity in MB photodegradation was MoO3 > SnO2/MoO3-50 % > SnO2/MoO3-25 % > SnO2/MoO3-5% > SnO2, demonstrating that MoO 3 acts as a modulator of acidity and this behavior directly influences the photocatalytic performance. In the photodegradation study, the physical mixture of SnO2+MoO3-25 % provided lower performance values than the heterojunction SnO2/MoO3-25 %, highlighting the importance of the appropriate synthesis of these materials.

引用

页数：9

共 123 条

[1] Comparison of hydrothermal and photocatalytic conversion of glucose with commercial TiO2: Superficial properties-activities relationships [J].