Preparation and characterization of noble metal (Pt, Ag, Ru) loaded ZnGa2O4 and its photocatalytic and photoelectric performance

被引：2

作者：

Zhang, Li ^{[1
]}

Liang, Qing-man ^{[1
]}

Dai, Chao-hua ^{[1
]}

Zhou, Min-jie ^{[1
]}

Liu, You-nian ^{[2
]}

Yan, Jian-hui ^{[1
,2
]}

机构：

[1] Hunan Inst Sci & Technol, Coll Chem & Chem Engn, Yueyang 414006, Peoples R China

[2] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2017年 / 28卷 / 23期

关键词：

SINGLE-CRYSTALLINE; CO2; REDUCTION; LIGHT; NANOPARTICLES; DEGRADATION; WATER; TIO2;

D O I：

10.1007/s10854-017-7733-5

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

ZnGa2O4 nanoparticles were prepared by hydrothermal method. Noble metal (Pt, Ag, Ru) nanoparticles were subsequently selected as cocatalyst for ZnGa2O4 surface modification by photo-deposition method. XRD, SEM, TEM, HRTEM, UV-vis DRS and PL techniques were used for crystalline structure, morphology, composition, light absorption and charge separation analysis, respectively. The deposition of cocatalyst (Pt, Ag, Ru) enhanced the visible light absorption and improved the electrons and holes separation. The photocatalysts were investigated in the photocatalytic reduction of CO2 with H2O containing NaOH and Na2SO3 as sacrificed agent under the simulated sunlight irradiation. The highest photocatalytic efficiency was observed over 1 wt% Pt/ZnGa2O4, and the yield of the main reduction products, methanol, was 3.72 mmol g(cat) (-1) under 120 min light irradiation, which was 4.3 times as compared to the unloaded ZnGa2O4. The photoelectric properties of ZnGa2O4 and 1 wt% Pt/ZnGa2O4 samples were also detected. The transient photocurrents of 1 wt% Pt/ZnGa2O4 sample are remarkably higher than that of unloaded ZnGa2O4. A possible mechanism of photocatalytic reduction of CO2 over Pt/ZnGa2O4 was proposed.

引用

页码：17917 / 17924

页数：8

共 30 条

[1] Helical structure of single-crystalline ZnGa2O4 nanowires [J].

Bae, SY ;

Lee, J ;

Jung, H ;

Park, J ;

Ahn, JP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (31) :10802-10803

[2] Influence of loading Pt, RhO2 co-catalysts on photocatalytic overall water splitting over H1.9K0.3La0.5Bi0.1Ta2O7 [J].

Chen, Wei ;

Wang, Hui ;

Mao, Liqun ;

Chen, Xiaoping ;

Shangguan, Wenfeng .

CATALYSIS COMMUNICATIONS, 2014, 57 :115-118

[3] Photooxidation of trichloroethylene on Pt/TiO2 [J].

Driessen, MD ;

Grassian, VH .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (08) :1418-1423

[4] Synthesis and characterization of novel samarium-doped CuAl2O4 and its photocatalytic performance through the modified sol-gel method [J].

Gholami, Ali ;

Maddahfar, Mahnaz .

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2016, 27 (04) :3341-3346

[5] In situ synthesis of noble metal nanoparticles in ultrathin TiO2-gel films by a combination of ion-exchange and reduction processes [J].

He, JH ;

Ichinose, I ;

Kunitake, T ;

Nakao, A .

LANGMUIR, 2002, 18 (25) :10005-10010

[6] Enhanced photocatalytic activity of Pt-doped TiO2 for NOx oxidation both under UV and visible light irradiation: A synergistic effect of lattice Pt4+ and surface PtO [J].

Hu, Yun ;

Song, Xu ;

Jiang, Shumei ;

Wei, Chaohai .

CHEMICAL ENGINEERING JOURNAL, 2015, 274 :102-112

[7]

Kiwi J., 1984, J PHYS CHEM, V88, P1037

[8] Effect of silver doping on the TiO2 for photocatalytic reduction of CO2 [J].

Koci, K. ;

Mateju, K. ;

Obalova, L. ;

Krejcikova, S. ;

Lacny, Z. ;

Placha, D. ;

Capek, L. ;

Hospodkova, A. ;

Solcova, O. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2010, 96 (3-4) :239-244

[9]

Lguchi S., 2016, APPL CATAL A-GEN, V521, P160

[10] Photocatalytic reduction of CO2 over noble metal-loaded and nitrogen-doped mesoporous TiO2 [J].

Li, Xiukai ;

Zhuang, Zongjin ;

Li, Wei ;

Pan, Huiqi .

APPLIED CATALYSIS A-GENERAL, 2012, 429 :31-38

← 1 2 3 →