Hydrothermal Preparation, Characterization and Photocatalytic Properties of C, N Co-Doped ZnO/ZnS Composites

2012 ◽  
Vol 610-613 ◽  
pp. 1841-1844
Author(s):  
Ying Huan Fu ◽  
Ke Teng ◽  
Xiao Li Dong ◽  
Chun Ling Yu ◽  
Chun Ma ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Raw Materials ◽  
Hydrothermal Process ◽  
Solar Irradiation ◽  
Hydrothermal Preparation ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Doped Zno ◽  
Co Doped

C, N, S co-doped ZnO/ZnS composites were prepared by hydrothermal method using ZnSO4 and L-cysteine as raw materials, and investigated by UV-vis DRS, XRD, XPS. The results showed that C, N, S have successfully doped onto ZnO and substituted O of crystal lattice during hydrothermal process. The resulting co-doped ZnO composites exhibit significantly higher photocatalytic activity (45%) than that of pure ZnO (<5%) for degradation of reactive brilliant blue KN-R aqueous solution under simulative solar irradiation. The enhancement of photocatalytic performance of co-doped composites can be attributed to the reducing of electron-hole pair recombination and narrowed band gap.

Microwave Assisted Hydrothermal Synthesis and Characterization of N, S Co-Doped ZnO Photocatalyst

2012 ◽  
Vol 616-618 ◽  
pp. 1841-1844 ◽  
Author(s):  
Hong Chao Ma ◽  
Yi Ru Ding ◽  
Ying Huan Fu ◽  
Xiao Li Dong ◽  
Chun Ma ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Band Gap ◽  
Light Response ◽  
Solar Irradiation ◽  
Synthesis And Characterization ◽  
Impurity States ◽  
Microwave Assisted ◽  
Doped Zno ◽  
Co Doped

The N, S codoped ZnO was synthesized by microwave assisted hydrothermal method. The N, S codoping narrowed the band gap of ZnO (formed impurity states in the band gap), hence shift light response to range of visible light. Furthermore, the doped ZnO exhibits significantly higher photocatalytic activity than that of pure ZnO for degradation of reactive brilliant blue KN-R aqueous solution under simulative solar irradiation.

Temperature and Salinity Effects on Photocatalytic Performance of Cerium Doped Zinc Oxide

2020 ◽  
Vol 307 ◽  
pp. 223-228
Author(s):  
Wan Rafizah Wan Abdullah ◽  
Lee Chia Siang ◽  
Maishara Syazrinni Rooshde ◽  
Mohd Sabri Mohd Ghazali
Keyword(s):  
Photocatalytic Performance ◽  
Catalyst Surface ◽  
Uv Light ◽  
Operating Temperature ◽  
Chloride Ions ◽  
Photocatalytic Efficiency ◽  
Electron Hole ◽  
Doped Zno ◽  
The Stability ◽  
Uv C

Cerium (Ce) doped ZnO is a promising material for advanced photocatalysis. It is useful for inducing the treatment of many organic pollutants in water. However, the stability of its performance under varying temperature and saline condition has never been not fully assessed. In this study, powder form photocatalyst comprising 99.0 mol% ZnO and 1 mol% CeO2 has been synthesized via modified citrate gelation technique and solid-state sintering at 1200 °C for 5 hours. The conversion of Ce doped ZnO from its precursors has been confirmed using XRD, SEM, and EDX techniques. The photocatalytic efficiency of the synthesized Ce doped ZnO under UV-C light (λ=265 nm) was determined. In the experiment, the operating temperature was varied between 25 to 40 °C, and the salinity of the treated solution was increased from 0 to 40 g/L NaCl. The findings revealed that the photocatalytic efficiency of Ce doped ZnO under UV light improved from 78.2% to 88.6% as the temperature increased from 25 to 40 °C. The performance of Ce doped ZnO decreased from 86.7% to 36.7% when the salinity increased from 0 g/L to 40 g/L. The elevation of temperature encouraged the photogeneration of electron-hole pairs on catalyst surface while the presence of chloride ions in treated medium caused scavenging of hydroxyl radicals or hole.

Template-Free Synthesis of Single Crystal MoO3 Nanobelts and its Potocatalytic Properties

2014 ◽  
Vol 953-954 ◽  
pp. 1147-1150
Author(s):  
Jing Li ◽  
Yan Zhong Zhen ◽  
Feng Fu ◽  
Dan Jun Wang ◽  
Xiao Ming Gao ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Raw Materials ◽  
Hydrothermal Process ◽  
Orthorhombic Phase ◽  
Light Irradiation ◽  
Experimental Result ◽  
Template Free ◽  
Good Photocatalytic Performance

Uniform 1D MoO3nanobelts were synthesized via a facile template-free hydrothermal process using (NH4)6Mo24·4H2O as raw materials. XRD, FE-SEM, HR-TEM techniques were employed to investigate the phase composition, morphology, and microstructure of as-synthesized samples. The MoO3nanobelts have single crystalline orthorhombic phase structure, preferentially grow in [001] direction. The photocatalytic properties were evaluated by the photodegradation of Rhodamine-B under visible light irradiation. The experimental result illustrated that the compound exhibits good photocatalytic performance for degradation of RhB under visible light irradiation.

Substrate placement angle-dependent growth of Ga/F co-doped ZnO nanostructures synthesized by hydrothermal process

2017 ◽  
Vol 43 ◽  
pp. S529-S534
Author(s):  
Krisana Chongsri ◽  
Kanokthip Boonyarattanakalin ◽  
Wisanu Pecharapa
Keyword(s):  
Hydrothermal Process ◽  
Zno Nanostructures ◽  
Doped Zno ◽  
Dependent Growth ◽  
Co Doped

scholarly journals Synthesis, Characterization, and Photocatalytic Activity of N-Doped ZnO/ZnS Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Hongchao Ma ◽  
Xiaohong Cheng ◽  
Chun Ma ◽  
Xiaoli Dong ◽  
Xinxin Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Treatment Approach ◽  
Absorption Efficiency ◽  
Electron Hole ◽  
Anthraquinone Dye ◽  
N Doping ◽  
Doped Zno ◽  
Zno Semiconductor ◽  
High Absorption

The aim of the present study is to enhance photocatalytic performance of ZnO semiconductor by comodification with doping of nonmetal ions and coupling with another semiconductor. Therefore, we synthesized the N-doped ZnO/ZnS photocatalysts via a simple heat-treatment approach using L-cysteine as N and S source in this work. Anthraquinone dye (reactive brilliant blue KNR) is employed as the model contaminants to evaluate the photocatalytic activity of as-synthesized samples under sunlight illumination. The N-doped ZnO/ZnS synthesized by this method shows better photocatalytic activity as compared to that of pure ZnO. The enhanced photocatalytic activity of the N-doped ZnO/ZnS composites may be related to the existence of N doping, ZnS/ZnO heterostructure, and covered abundant carbon species on the photocatalyst surface, which causing high absorption efficiency of light, efficient separation of electron-hole pairs, and quick surface reaction in doped ZnO.

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