scholarly journals Hydrothermal Synthesis of (001) Facet Highly Exposed ZnO Plates: A New Insight into the Effect of Citrate

Crystals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 552 ◽  
Author(s):  
Shirui Luo ◽  
Ruosong Chen ◽  
Lan Xiang ◽  
Jing Wang
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Growth Mechanism ◽  
Zno Nanoparticles ◽  
Hydrothermal Route ◽  
One Step ◽  
Synthesis Routes ◽  
First Time ◽  
Insight Into

In this work, two synthesis routes were applied to investigate the effect of citrates on the construction of the ZnO structure. Well-dispersed ZnO plates with (001) facet highly exposed were prepared via one-step hydrothermal route, while ZnO nanoparticles were obtained via two-step route. In one-step route, citrates were added before the formation of Zn(OH)2 precursor, while citrates were added after the formation of Zn(OH)2. For the first time, the interaction between citrates and the Zn(OH)2 precursor was investigated and citrates that participated in the formation of Zn(OH)2 were the main cause for (001) facet exposed structure construction. A growth mechanism about the formation of ZnO plates in the presence of citrates was proposed. The as-prepared ZnO plates showed enhanced photocatalytic activity for the degradation of methylene blue (MB).

Hydrothermal Synthesis and Photocatalytic Activities of La-Doped BiVO4 Microcakes

2014 ◽  
Vol 881-883 ◽  
pp. 177-180
Author(s):  
Guo Cong Liu ◽  
Shi Hua Xu ◽  
Yin Jian Liang
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Absorption Band ◽  
Visible Light Irradiation ◽  
Hydrothermal Route ◽  
Monoclinic Crystal ◽  
Photocatalytic Activities ◽  
Template Free ◽  
La Doped

Novel La-doped BiVO4microcakes have been hydrothermally synthesized and characterized by XRD, XPS, SEM, and DRS techniques.The results reveal that the well crystallized and cake-like Bi0.95La0.05VO4monoclinic crystal with the diameter range of 15 μm and the width range of 0.2-0.8 μm can be obtained via a template-free hydrothermal route. Compared with pure BiVO4microcakes, Bi0.95La0.05VO4microcake shows a little red shift in the absorption band, resulting in a narrowed band gap (2.37 eV), which has the better photocatalytic activity with a 98.6 % degradation of methylene blue (MB) with a concentration of 10 mg/L under visible-light irradiation for 60 min.

scholarly journals Green one-step synthesis of cellulose nanocrystal/ ZnO nanohybrid with high photocatalytic activity

2021 ◽  
Vol 5 (3) ◽  
pp. first
Author(s):  
An Nang Vu ◽  
Anh Mai Tran ◽  
Nghi Tuyet Nguyen ◽  
Duyen My Ngoc Lam ◽  
Phong Pham Nam Le ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Zno Nanoparticles ◽  
Low Cost ◽  
Nitrogen Adsorption ◽  
High Photocatalytic Activity ◽  
Pure Cellulose ◽  
Nypa Fruticans ◽  
One Step ◽  
Adsorption Desorption

In this work, nanohybrid of zinc oxide/ cellulose nanocrystals (ZnO/CNC) was successfully prepared by using a low cost and green method for photocatalytic degradation of methylene blue (MB). CNC had been derived through the hydrolysis reaction by citric/hydrochloric acid from the pure cellulose isolated from Vietnamese Nypa fruticans trunk. The obtained CNC with carboxyl groups could act as a stabilizing and supporting agent to anchor ZnO nanoparticles. The chemical and crystal structures, morphology, thermal and photocatalytic properties of the ZnO/CNC nanohybrid were characterized by FESEM, FTIR, XRD, FESEM, BET, EDX, TGA, DRS and photocatalytic tests. Analyses of FTIR spectra, XRD, and FESEM indicated that the ZnO nanocrystals with the size of 50 nm formed and loaded on the surface of CNC. The TGA analysis demonstrated that the ZnO loading sample (ZnO/CNC) had the thermal degradation onset temperature higher than that of neat CNC. ZnO/CNC cuold be absorpted ultraviolet light and have high value of specific surface area (SBET), based on the DRS spectra and the nitrogen adsorption – desorption isotherms analysis, respectively. ZnO/CNC displayed more photocatalytic activity than pure ZnO upon degradation of methylene blue due to strong interaction between the CNC and ZnO nanoparticles. The maximum degradation of MB was about 95% in 150 minutes for the ZnO/CNC.

Lanthanide-doped Sr2ScF7 nanocrystals: controllable hydrothermal synthesis, the growth mechanism and tunable up/down conversion luminescence properties

2017 ◽  
Vol 5 (13) ◽  
pp. 3264-3275 ◽  
Author(s):  
Bei Zhao ◽  
Dingyi Shen ◽  
Jun Yang ◽  
Shanshan Hu ◽  
Xianju Zhou ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Growth Mechanism ◽  
Luminescence Properties ◽  
Hydrothermal Route ◽  
One Step ◽  
Down Conversion

Sr2ScF7 micro/nanocrystals with various morphologies were firstly synthesized via a one-step surfactant-free hydrothermal route. Sr2ScF7:Yb3+/Er3+/Tm3+ phosphors show tunable RGB and white emissions.

One-step hydrothermal synthesis of In2.77S4 nanosheets with efficient photocatalytic activity under visible light

2017 ◽  
Vol 123 (6) ◽  
Author(s):  
Xiang-feng Wu ◽  
Hui Li ◽  
Yang Sun ◽  
Yi-jin Wang ◽  
Chen-xu Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Visible Light ◽  
One Step

scholarly journals Degradation of methylene blue with magnetic Co-doped Fe3O4@FeOOH nanocomposites as heterogeneous catalysts of peroxymonosulfate

RSC Advances ◽  
2019 ◽  
Vol 9 (31) ◽  
pp. 17664-17673 ◽  
Author(s):  
Kai Wang ◽  
Yi Yang ◽  
Tian C. Zhang ◽  
Ying Liang ◽  
Qingguo Wang
Keyword(s):  
Methylene Blue ◽  
Hydrothermal Synthesis ◽  
Heterogeneous Catalysts ◽  
Synthesis Process ◽  
Wide Ph Range ◽  
One Step ◽  
Ph Range ◽  
Co Doped

Magnetic Co-doped Fe3O4@FeOOH nanocomposites were prepared in one step using the hydrothermal synthesis process for catalyzing peroxymonosulfate (PMS) to degrade refractory methylene blue (MB) at a wide pH range (3.0–10.0).

scholarly journals Mild, one-step hydrothermal synthesis of carbon-coated CdS nanoparticles with improved photocatalytic activity and stability

2015 ◽  
Vol 36 (7) ◽  
pp. 1077-1085 ◽  
Author(s):  
Shuai Zou ◽  
Zaihui Fu ◽  
Chao Xiang ◽  
Wenfeng Wu ◽  
Senpei Tang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Cds Nanoparticles ◽  
Carbon Coated ◽  
One Step

The fabrication and the characterization of a TiO2/titanate nanohybrid for efficient hydrogen evolution

RSC Advances ◽  
2015 ◽  
Vol 5 (17) ◽  
pp. 13011-13015 ◽  
Author(s):  
Shien Guo ◽  
Hongyan Ning ◽  
Mingxia Li ◽  
Rong Hao ◽  
Yuting Luan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrothermal Route ◽  
One Step

A facile one-step hydrothermal route for a TiO2/titanate nanojunction has been developed for improving the photocatalytic activity of hydrogen evolution.

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