Tailored routes for home-made Bi-doped ZnO nanoparticles. Photocatalytic performances towards o-toluidine, a toxic water pollutant

被引：26

作者：

Mostoni, S. ^{[1
,4
]}

Pifferi, V. ^{[1
,2
]}

Falciola, L. ^{[1
,2
]}

Meroni, D. ^{[1
,2
]}

Pargoletti, E. ^{[1
,2
]}

Davoli, E. ^{[3
]}

Cappelletti, G. ^{[1
,2
]}

机构：

[1] Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy

[2] Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM, Via Giusti 9, I-50121 Florence, Italy

[3] IRCCS Ist Ric Farmacol Mario Negri, Via La Masa 19, I-20156 Milan, Italy

[4] Univ Milano Bicocca, Dipartimento Sci Mat, Via Roberto Cozzi 55, I-20125 Milan, Italy

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2017年 / 332卷

关键词：

o-Toluidine; Zinc oxide nanoparticles; Bismuth doping; Photoremoval; Photodegradation mechanism; AROMATIC-AMINES; BLADDER-CANCER; TIO2; DEGRADATION; NANOCOMPOSITE; REMOVAL; ANILINE; FILMS; DYES; IR;

D O I：

10.1016/j.jphotochem.2016.10.003

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：

Herein we report the photodegradation of highly toxic o-toluidine in aqueous media (under UV irradiation), by using home-made bare and bismuth-doped ZnO nanoparticles. The latter powder was prepared by both a traditional impregnation method and by an innovative sol-gel synthesis, obtained using bismuth nitrate as precursor. Moreover, synthetic conditions (such as zinc salts and medium acidity) were varied in order to obtain different semiconductor nanopowders with diverse physicochemical properties and, hence, photocatalytic performances. Both the disappearance and the mineralization of the pollutant molecule were followed by Linear Sweep Voltammetry and Total Organic Carbon techniques, respectively. Photocatalysis by-products were then identified by HPLC-MS (on eluates, after 3h and 6 h) and ATR-FTIR (on used nanopowders) analyses. Thus, a new photodegradation pathway (with azo dimer derivatives in the first step) has, been proposed. Bi-impregnated samples show high degree of mineralization, reducing the stability of the intermediates. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：534 / 545

页数：12