Structural and photocatalytic properties of silicon carbide powder and nanowires modified by gold nanoparticles

被引：9

作者：

Nazarkovsky, Michael ^{[1
]}

Alekseev, Sergei ^{[2
]}

Huczko, Andrzej ^{[3
]}

Zaitsev, Volodymyr ^{[1
]}

Dupont, Jairton ^{[4
]}

Kai, Jiang ^{[1
]}

Xing, Yutao ^{[5
]}

Scofield, Arthur L. ^{[1
]}

Chacon, Gustavo ^{[4
]}

Carreira, Renato S. ^{[1
]}

机构：

[1] Pontifical Catholic Univ Rio De Janeiro, Chem Dept, 225 Marques Sao Vicente Str, BR-22435900 Rio De Janeiro, RJ, Brazil

[2] Taras Shevchenko Natl Univ Kyiv, Fac Chem, 64 Volodymyrska Str, UA-01601 Kiev, Ukraine

[3] Warsaw Univ, Dept Chem, 1 Pasteur Str, PL-02093 Warsaw, Poland

[4] Univ Fed Rio Grande do Sul, Inst Chem, 9500 Bento Goncalves Av, BR-91501970 Porto Alegre, RS, Brazil

[5] Fed Fluminense Univ UFF, Inst Phys, 156 Passo Patria Str, BR-24210310 Niteroi, RJ, Brazil

来源：

RESEARCH ON CHEMICAL INTERMEDIATES | 2019年 / 45卷 / 08期

关键词：

SiC nanowires; Silicon carbide; Au nanoparticles; CO2; reduction; SIC POLYTYPES; CO2; REDUCTION; IN-SITU; TIO2; TEMPERATURE; ENERGY; SELECTIVITY; CONVERSION; AU; NANOSTRUCTURES;

D O I：

10.1007/s11164-019-03892-3

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Commercial bulk powder of SiC and SHS-synthesized SiC nanowires were studied. Gold nanoparticles were deposited onto a surface of both samples. Basic properties, such as crystalline structure, phase composition, morphology and photocatalytic activity with the chromatographic analysis of the reaction products, were determined. Obtained silicon carbides are crystalline materials of hexagonal (commercial SiC) and cubic (synthesized SiC nanowires) structures. The presence of gold nanoparticles was proven through Raman spectroscopy, inductively coupled plasma mass spectrometry and transmission electron microscopy. No gold phase was detected as a separate crystalline component in both Au-modified samples. The neat nanowires were indicated as a catalyst rather accumulating intermediate organic substances than commercial SiC which enables shifting equilibrium to the generation of gaseous products (CO and CH4). The gold-containing SiC nanowires demonstrated an essential enhancement of photocatalytic activity keeping Au nanoparticles on the surface after the reaction.

引用

页码：4081 / 4100

页数：20

共 76 条

[1]

[Anonymous], FARADAY DISCUSS

[2]

[Anonymous], 2014, AEROSOL AIR QUAL RES, DOI DOI 10.4209/aaqr.2013.09.0283

[3]

[Anonymous], J NANOMATER

[4] Understanding the Origin of the Photocatalytic CO2 Reduction by Au- and Cu-Loaded TiO2: A Microsecond Transient Absorption Spectroscopy Study [J].