金纳米粒子在TiO2气凝胶基质上的行为: 光催化活性评价和结构研究

doi:10.1016/S1872-2067(11)60500-7

催化学报 ›› 2013, Vol. 34 ›› Issue (4): 734-740.DOI: 10.1016/S1872-2067(11)60500-7

金纳米粒子在TiO₂气凝胶基质上的行为: 光催化活性评价和结构研究

Zsolt PAP, Andreea RADU, Izabella Jolan HIDI, Georgian MELINTE, Lucian DIAMANDESCU, Traian POPESCU, Lucian BAIA, Virginia DANCIU, Monica BAIA

a Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos str., 400028, Cluj-Napoca, Romania;
b Faculty of Physics, Babes-Bolyai University, 1 Mihail Kogalniceanu str., 400084, Cluj-Napoca, Romania;
c National Institute of Materials Physics, P. O. Box MG-7, 77125, Bucharest-Magurele, Romania;
d Institute for Interdisciplinary Research in Bio-Nano-Sciences, Babes-Bolyai University, 42 Treboniu Laurian str., 400271, Cluj-Napoca, Romania

出版日期:2013-04-23 发布日期:2013-04-24
通讯作者: Monica BAIA

Behavior of gold nanoparticles in a titania aerogel matrix: Photocatalytic activity assessment and structure investigations

Zsolt PAP, Andreea RADU, Izabella Jolan HIDI, Georgian MELINTE, Lucian DIAMANDESCU, Traian POPESCU, Lucian BAIA, Virginia DANCIU, Monica BAIA

a Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos str., 400028, Cluj-Napoca, Romania;
b Faculty of Physics, Babes-Bolyai University, 1 Mihail Kogalniceanu str., 400084, Cluj-Napoca, Romania;
c National Institute of Materials Physics, P. O. Box MG-7, 77125, Bucharest-Magurele, Romania;
d Institute for Interdisciplinary Research in Bio-Nano-Sciences, Babes-Bolyai University, 42 Treboniu Laurian str., 400271, Cluj-Napoca, Romania

Online:2013-04-23 Published:2013-04-24
Supported by:
This work was supported by CNCSIS-UEFISCSU (PN II-RU_TE 81/2010).

摘要/Abstract

摘要：

TiO₂-Au aerogels containing different amounts of gold nanoparticles of different sizes (5 and 16 nm) were successfully synthesized using a sol-gel procedure, and were tested for salicylic acid photodegradation under UV irradiation. The structure and morphology of the obtained materials were investigated using X-ray diffraction, transmission electron microscopy, and N₂ adsorption-desorption measurements. UV-Vis spectroscopy was used to study the optical properties. The effects of the gold nanoparticles on the TiO₂ crystallization process were twofold, as follows: (i) the number of crystallized zones was strongly related to the concentration of the gold nanoparticles, and (ii) the smaller gold particles increased the time taken for the crystallization of the samples. It was found that the noble metal-doped samples exhibited higher degradation rates compared with bare titania. It was found that the most active photocatalyst in each studied system was the sample with the highest concentration of gold nanoparticles. Additionally, the highest degradation rate value was obtained with the smallest Au nanoparticles (46.4 × 10^-3 μmol/(L·s).

关键词: Nanomaterial, Sol-gel, Titania, Salicylic acid, Photocatalytic performance

Abstract:

Key words: Nanomaterial, Sol-gel, Titania, Salicylic acid, Photocatalytic performance

Zsolt PAP, Andreea RADU, Izabella Jolan HIDI, Georgian MELINTE, Lucian DIAMANDESCU, Traian POPESCU, Lucian BAIA, Virginia DANCIU, Monica BAIA. 金纳米粒子在TiO₂气凝胶基质上的行为: 光催化活性评价和结构研究[J]. 催化学报, 2013, 34(4): 734-740.

Zsolt PAP, Andreea RADU, Izabella Jolan HIDI, Georgian MELINTE, Lucian DIAMANDESCU, Traian POPESCU, Lucian BAIA, Virginia DANCIU, Monica BAIA. Behavior of gold nanoparticles in a titania aerogel matrix: Photocatalytic activity assessment and structure investigations[J]. Chinese Journal of Catalysis, 2013, 34(4): 734-740.

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金纳米粒子在TiO₂气凝胶基质上的行为: 光催化活性评价和结构研究

Behavior of gold nanoparticles in a titania aerogel matrix: Photocatalytic activity assessment and structure investigations

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