Characterization and Effect of Ag(0) vs. Ag(I) Species and Their Localized Plasmon Resonance on Photochemically Inactive TiO2

被引：21

作者：

Handoko, Chanel Tri ^{[1
,2
]}

Moustakas, Nikolaos G. ^{[2
]}

Peppel, Tim ^{[2
]}

Springer, Armin ^{[3
,4
]}

Oropeza, Freddy E. ^{[5
]}

Huda, Adri ^{[1
]}

Bustan, Muhammad Djoni ^{[6
]}

Yudono, Bambang ^{[1
]}

Gulo, Fakhili ^{[1
]}

Strunk, Jennifer ^{[2
]}

机构：

[1] Univ Sriwijaya, Program Studi Ilmu Lingkungan, Jalan Padang Selasa 524, Palembang 30121, Sumatera Selata, Indonesia

[2] Leibniz Inst Katalyse eV LIKAT, Albert Einstein Str 29a, D-18059 Rostock, Germany

[3] Univ Med Rostock, Arbeitsbereich Med Biol, Strempelstr 14, D-18057 Rostock, Germany

[4] Univ Med Rostock, Elektronenmikroskop Zentrum EMZ, Strempelstr 14, D-18057 Rostock, Germany

[5] Eindhoven Univ Technol, Dept Chem Engn & Chem, Lab Inorgan Mat Chem, POB 513, NL-5600 MB Eindhoven, Netherlands

[6] Univ Sriwijaya, Fak Tekn, Program Studi Teknik Kimia, Jalan Palembang Inderalaya Km 32, Inderalaya 30862, Sumatera Selata, Indonesia

来源：

CATALYSTS | 2019年 / 9卷 / 04期

关键词：

localized surface plasmon resonance; TiO2; silver; oxidation state; liquid impregnation; PHOTOCATALYTIC CO2 REDUCTION; VISIBLE-LIGHT; NANOPARTICLES; AG; WATER; SURFACE; SILVER; NANOCOMPOSITES; IMPREGNATION; DEGRADATION;

D O I：

10.3390/catal9040323

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：

Commercial TiO2 (anatase) was successfully modified with Ag nanoparticles at different nominal loadings (1%-4%) using a liquid impregnation method. The prepared materials retained the anatase structure and contained a mixture of Ag-0 and Ag-I species. Samples exhibited extended light absorption to the visible region. The effect of Ag loading on TiO2 is studied for the photocatalytic reduction of CO2 to CH4 in a gas-solid process under high-purity conditions. It is remarkable that the reference TiO2 used in this work is entirely inactive in this reaction, but it allows for studying the effect of Ag on the photocatalytic process in more detail. Only in the case of 2% Ag/TiO2 was the formation of CH4 from CO2 observed. Using different light sources, an influence of the localized surface plasmon resonance (LSPR) effect of Ag is verified. A sample in which all Ag has been reduced to the metallic state was less active than the respective sample containing both Ag-0 and Ag+, indicating that a mixed oxidation state is beneficial for photocatalytic performance. These results contribute to a better understanding of the effect of metal modification of TiO2 in photocatalytic CO2 reduction.

引用

页数：16

共 71 条

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