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Title: Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation

Abstract

Graphical abstract: UV–vis spectra of PANI, ZnO, Ni{sub 0.01}Zn{sub 0.99}O, Ni{sub 0.01}Zn{sub 0.99}O/PANI3 and Ni{sub 0.1}Zn{sub 0.9}O/PANI{sub 10} nanocomposites. - Highlights: • Ni{sub x}Zn{sub 1−x}O/PANI{sub y} photocatalysts are synthesized by the impregnation method. • Ni{sup 2+} amount control the morphology of ZnO and enhances its photoactivity. • Both Ni{sup 2+} and PANI extend the light absorption of ZnO toward the visible region. • Both Ni{sup 2+} and PANI enhance the electron–hole separation. - Abstract: Ni{sub x}Zn{sub 1−x}O/Polyaniline hybrid photocatalysts are synthesized and used for the experiments of hydrogen production from water-splitting under visible irradiation. XRD, UV–vis DRS and SEM are used to characterize the prepared materials. It is shown that the Ni{sup 2+} amount doped into ZnO controls its morphology and enhances its photoactivity for H{sub 2} generation. Polyaniline (PANI) is shown to sensitize ZnO and to extend its light absorption toward the visible region. The hybrid photocatalyst with 10 mol% Ni{sup 2+} and 10 wt.% PANI shows the maximum photocatalytic H{sub 2} production for one hour of visible irradiation: ∼558 μmol while only ∼178 μmol in the presence of pure ZnO. Additives like sacrificial electron donors and carbonate salts are found to play a key role in the improvementmore » of H{sub 2} evolution. Thus, the hydrogen photoproduction efficiency increases in the order: thiosulfate > sulfide > propanol and HCO{sub 3}{sup −} > CO{sub 3}{sup 2−}.« less

Authors:
 [1]; ;  [1];  [1]
  1. URCMEP (UR11ES85), Faculty of Sciences, University of Gabès, 6029 Gabès (Tunisia)
Publication Date:
OSTI Identifier:
22475938
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; DOPED MATERIALS; EVOLUTION; HYDROGEN; IMPREGNATION; INTERSTITIAL HYDROGEN GENERATION; NANOCOMPOSITES; NICKEL ADDITIONS; PHOTOPRODUCTION; SCANNING ELECTRON MICROSCOPY; VALENCE; VISIBLE RADIATION; VISIBLE SPECTRA; WATER; X-RAY DIFFRACTION; ZINC OXIDES

Citation Formats

Nsib, Mohamed Faouzi, E-mail: Mohamed.faouzi.ncib@gmail.com, National School of Engineers, Naffati, Naima, Rayes, Ali, Moussa, Noomen, National School of Engineers, Houas, Ammar, and Al Imam Mohammad Ibn Saud Islamic University. Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation. United States: N. p., 2015. Web. doi:10.1016/J.MATERRESBULL.2015.04.067.
Nsib, Mohamed Faouzi, E-mail: Mohamed.faouzi.ncib@gmail.com, National School of Engineers, Naffati, Naima, Rayes, Ali, Moussa, Noomen, National School of Engineers, Houas, Ammar, & Al Imam Mohammad Ibn Saud Islamic University. Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation. United States. doi:10.1016/J.MATERRESBULL.2015.04.067.
Nsib, Mohamed Faouzi, E-mail: Mohamed.faouzi.ncib@gmail.com, National School of Engineers, Naffati, Naima, Rayes, Ali, Moussa, Noomen, National School of Engineers, Houas, Ammar, and Al Imam Mohammad Ibn Saud Islamic University. Thu . "Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation". United States. doi:10.1016/J.MATERRESBULL.2015.04.067.
@article{osti_22475938,
title = {Effect of some operational parameters on the hydrogen generation efficiency of Ni-ZnO/PANI composite under visible-light irradiation},
author = {Nsib, Mohamed Faouzi, E-mail: Mohamed.faouzi.ncib@gmail.com and National School of Engineers and Naffati, Naima and Rayes, Ali and Moussa, Noomen and National School of Engineers and Houas, Ammar and Al Imam Mohammad Ibn Saud Islamic University},
abstractNote = {Graphical abstract: UV–vis spectra of PANI, ZnO, Ni{sub 0.01}Zn{sub 0.99}O, Ni{sub 0.01}Zn{sub 0.99}O/PANI3 and Ni{sub 0.1}Zn{sub 0.9}O/PANI{sub 10} nanocomposites. - Highlights: • Ni{sub x}Zn{sub 1−x}O/PANI{sub y} photocatalysts are synthesized by the impregnation method. • Ni{sup 2+} amount control the morphology of ZnO and enhances its photoactivity. • Both Ni{sup 2+} and PANI extend the light absorption of ZnO toward the visible region. • Both Ni{sup 2+} and PANI enhance the electron–hole separation. - Abstract: Ni{sub x}Zn{sub 1−x}O/Polyaniline hybrid photocatalysts are synthesized and used for the experiments of hydrogen production from water-splitting under visible irradiation. XRD, UV–vis DRS and SEM are used to characterize the prepared materials. It is shown that the Ni{sup 2+} amount doped into ZnO controls its morphology and enhances its photoactivity for H{sub 2} generation. Polyaniline (PANI) is shown to sensitize ZnO and to extend its light absorption toward the visible region. The hybrid photocatalyst with 10 mol% Ni{sup 2+} and 10 wt.% PANI shows the maximum photocatalytic H{sub 2} production for one hour of visible irradiation: ∼558 μmol while only ∼178 μmol in the presence of pure ZnO. Additives like sacrificial electron donors and carbonate salts are found to play a key role in the improvement of H{sub 2} evolution. Thus, the hydrogen photoproduction efficiency increases in the order: thiosulfate > sulfide > propanol and HCO{sub 3}{sup −} > CO{sub 3}{sup 2−}.},
doi = {10.1016/J.MATERRESBULL.2015.04.067},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 70,
place = {United States},
year = {2015},
month = {10}
}