Facile preparation of yttrium and aluminum co-doped ZnO via a sol–gel route for photocatalytic hydrogen production

2014 ◽  
Vol 2 (29) ◽  
pp. 11040-11044 ◽  
Author(s):  
Jingpei Huo ◽  
Liting Fang ◽  
Yaling Lei ◽  
Gongchang Zeng ◽  
Heping Zeng
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Sol Gel ◽  
High Photocatalytic Activity ◽  
Photocatalytic Hydrogen Production ◽  
Gel Method ◽  
Facile Preparation ◽  
Doped Zno ◽  
Co Doped ◽  
Excellent Stability

Yttrium and aluminum co-doped ZnO were successfully synthesized by the sol–gel method. The obtained products showed high photocatalytic activity for hydrogen production (5.71 mmol h−1 g−1), and exhibited excellent stability and recyclability.

scholarly journals Mg and La Co-doped ZnO Nanoparticles Prepared by Sol–gel Method: Synthesis, Characterization and Photocatalytic Activity

2019 ◽  
Vol 64 (1) ◽  
pp. 61-74 ◽  
Author(s):  
Behnam Khanizadeh ◽  
Morteza Khosravi ◽  
Mohammad A. Behnajady ◽  
Ali Shamel ◽  
Behrouz Vahid
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Zno Nanoparticles ◽  
Sol Gel ◽  
Bet Surface Area ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Doped Zno ◽  
Co Doped

In this study, La and Mg doped, and co-doped ZnO nanoparticles were prepared using the sol-gel method. The prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (DRS), and N2 physisorption techniques. The XRD results indicated that the prepared nanoparticles can be well adopted by the hexagonal wurtzite structure crystal and there are no second impurity peaks. Studies of the FESEM, EDX and TEM have shown that the samples have uniform spherical-like morphology with a homogenous distribution. The incorporation of La and Mg into the ZnO lattice had no effect on the morphology of the nanoparticles, but a reduction in the size of the grains (≈ 14 nm to ≈ 7 nm) was observed due to the insertion of these ions. The results of N2 physisorption indicated that there was an increase in BET surface area and pore volume for doped and co-doped samples. The results of DRS showed an increase in band gap energy and a blue shift at the absorption edge for doped and co-doped samples. The photocatalytic activity of the prepared catalysts was evaluated in the removal of RhB under UVA irradiation. The results showed that Mg5%-La5%/ZnO had the highest photoactivity (91.18 %) among all samples.

scholarly journals Novel N-doped ZrO2 with enhanced visible-light photocatalytic activity for hydrogen production and degradation of organic dyes

RSC Advances ◽  
2018 ◽  
Vol 8 (13) ◽  
pp. 6752-6758 ◽  
Author(s):  
Yuanyang Wang ◽  
Yinghua Zhang ◽  
Haiqiang Lu ◽  
Yanxin Chen ◽  
Zhenmin Liu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Visible Light ◽  
Nitrogen Source ◽  
Organic Dyes ◽  
Low Cost ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Visible Light Photocatalytic

Two new types of N-doped ZrO2 photocatalysts ZON and AZON have been synthesized using ethylenediamine as the nitrogen source by a facile and low-cost sol–gel method.

Preparation and photocatalytic activity of Cu-doped ZnO thin films prepared by the sol–gel method

2012 ◽  
Vol 258 (20) ◽  
pp. 8192-8198 ◽  
Author(s):  
P. Jongnavakit ◽  
P. Amornpitoksuk ◽  
S. Suwanboon ◽  
N. Ndiege
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Doped Zno

Rare earth element, Sm, modified graphite phase carbon nitride heterostructure for photocatalytic hydrogen production

2019 ◽  
Vol 43 (4) ◽  
pp. 1716-1724 ◽  
Author(s):  
Lingjiao Li ◽  
Hai Yu ◽  
Jing Xu ◽  
Sheng Zhao ◽  
Zeying Liu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Rare Earth ◽  
Hydrogen Production ◽  
Rare Earth Element ◽  
Carbon Nitride ◽  
Earth Element ◽  
High Photocatalytic Activity ◽  
Graphite Phase ◽  
Photocatalytic Hydrogen Production ◽  
New Type

A new type of Sm2O3@Ni7S6/g-C3N4 composite has high photocatalytic activity and stability.

scholarly journals Comparative study on photocatalytic activity of transition metals (Ag and Ni)-doped ZnO nanomaterials synthesized via sol–gel method

2020 ◽  
Vol 7 (2) ◽  
pp. 191590 ◽  
Author(s):  
A. K. Azfar ◽  
M. F. Kasim ◽  
I. M. Lokman ◽  
H. A. Rafaie ◽  
M. S. Mastuli
Keyword(s):  
Photocatalytic Activity ◽  
Active Sites ◽  
Sol Gel ◽  
Textural Properties ◽  
High Photocatalytic Activity ◽  
Factors Affecting ◽  
Gel Method ◽  
Sol Gel Method ◽  
Zno Nanomaterials ◽  
Almost All

Ag and Ni/ZnO photocatalyst nanostructures were successfully synthesized by a sol–gel method. In this work, the photocatalyst sample was systematically studied based on several factors affecting the performance of photocatalyst, which are size, morphology, band gap, textural properties and the number of active sites presence on the surface of the nanocatalyst. X-ray diffraction revealed that Ag/ZnO nanomaterials experienced multiple phases, meanwhile for Ni/ZnO the phase of nanomaterials were pure and single phase for stoichiometry less than 5%. Field emission scanning electron microscope (FESEM) showed almost all of the synthesized nanomaterials possessed a mixture of nanorods and spherical-like shape morphology. The Ag/ZnO showed high photocatalytic activity, producing at least 14th trials of nanocatalyst reusability on degradation of methyl orange under UV irradiation. Interestingly, this phenomenon was not observed in larger surface area of Ni/ZnO nanomaterials which supposedly favour photocatalytic activity, but instead producing poor photocatalytic performance. The main reasons were studied and exposed by temperature-programmed desorption of carbon dioxide (TPD–CO 2 ) which showed that incorporation of Ag into ZnO lattice has enhanced the number of active sites on the surface of the nanocatalyst. Whereas incorporation of Ni in ZnO has lowered the number of active sites with respect to undoped ZnO. Active sites measurement is effective and significant, providing opportunities in developing an intensive study as an additional factor.

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