scholarly journals Electrochemically Exfoliated Graphite/Cu/Cu2O Composites and Their Photocatalytic Activity

POSITRON ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 34
Author(s):  
Lia Destiarti ◽  
Oktaviardi Bityasmawan Abdillah ◽  
Retno Maharsi ◽  
Octia Floweri ◽  
Ferry Iskandar
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Reduction Method ◽  
Degradation Process ◽  
Sem Analysis ◽  
Exfoliated Graphite ◽  
In Situ Reduction ◽  
Microwave Assisted ◽  
Copper Addition

In this work, the photocatalytic performance of electrochemically exfoliated graphite (EG) with low copper addition (≤ 5 wt.%) was studied. Composites of EG/Cu/Cu2O were successfully prepared by microwave-assisted in situ reduction method. FTIR spectra of the samples showed that the main functional groups of graphite were detected in the samples. XRD characterization further proved the presence of EG, Cu, and Cu2O in the samples. The higher proportion of Cu2O presented in the samples prepared with a higher amount of Cu2+. SEM analysis showed that Cu2O/Cu particles were homogeneously deposited on the surface of EG. The composites of EG, Cu, and Cu2O with a varied amount of Cu (1 and 5 wt. %) in EG / Cu2+ mixture were examined as photocatalyst in the degradation process of Rhodamine B (RhB). The photocatalytic degradation of RhB was analysed by observing its decolorization within a set time of irradiation. UV-Vis analysis revealed that the degradation of RhB in EG/Cu/Cu2O A and B for 105 minutes was 26 and 35 %, respectively. The result demonstrates that the sample with a larger amount of Cu2O (sample B, Cu 5 wt.%) shows higher photocatalytic activity in the degradation of RhB.

Photocatalytic properties of Bi/BiOCl heterojunctions synthesized using an in situ reduction method

2014 ◽  
Vol 38 (10) ◽  
pp. 4913-4921 ◽  
Author(s):  
Jiajia Hu ◽  
Guangqing Xu ◽  
Jinwen Wang ◽  
Jun Lv ◽  
Xinyi Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Reduction Method ◽  
Uv Light ◽  
Photocatalytic Properties ◽  
In Situ Reduction ◽  
Light Activity ◽  
Bi Nanoparticles

Bi nanoparticles on BiOCl nanosheets, synthesized via in situ reduction, enhance the UV light photocatalytic activity and achieve visible light activity.

The ferromagnetic–antiferromagnetic properties of Ni–Cr2O3composite hollow spheres prepared by an in situ reduction method

CrystEngComm ◽  
2014 ◽  
Vol 16 (7) ◽  
pp. 1322-1333 ◽  
Author(s):  
Shuijin Lei ◽  
Lei Liu ◽  
Chunying Wang ◽  
Xiaolian Shen ◽  
Donghai Guo ◽  
...  
Keyword(s):  
Reduction Method ◽  
Hollow Spheres ◽  
In Situ Reduction

Photocatalytic Activity of Ag@AgBr/Ag2CO3 Heterojunction Synthesized by In-situ Reduction

NANO ◽  
2021 ◽  
Author(s):  
Hanxiao Du ◽  
Juan Ji ◽  
Luyi Wang ◽  
Chenwei Qin ◽  
Ze Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
In Situ Reduction

Effect of different reductants on the composition and photocatalytic performances of Ag/AgIO3 hybrids prepared by in-situ reduction method

2020 ◽  
Vol 115 ◽  
pp. 107876
Author(s):  
Mingcong Zhang ◽  
Yanmin Li ◽  
Qingyao Wang ◽  
Rencheng Jin ◽  
Hui Xu ◽  
...  
Keyword(s):  
Reduction Method ◽  
In Situ Reduction ◽  
Photocatalytic Performances

scholarly journals In Situ Construction of a MgSn(OH)6 Perovskite/SnO2 Type-II Heterojunction: A Highly Efficient Photocatalyst towards Photodegradation of Tetracycline

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 53 ◽  
Author(s):  
Yuanyuan Li ◽  
Xiaofang Tian ◽  
Yaoqiong Wang ◽  
Qimei Yang ◽  
Yue Diao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Ultraviolet Irradiation ◽  
Photocatalytic Oxidation ◽  
Photocatalytic Performance ◽  
Diffuse Reflectance Spectroscopy ◽  
Active Species ◽  
Growth Strategy ◽  
Type Ii ◽  
Highly Efficient

Using solar energy to remove antibiotics from aqueous environments via photocatalysis is highly desirable. In this work, a novel type-II heterojunction photocatalyst, MgSn(OH)6/SnO2, was successfully prepared via a facile one-pot in situ hydrothermal method at 220 °C for 24 h. The obtained heterojunctions were characterized via powder X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic performance was evaluated for photodegradation of tetracycline solution under ultraviolet irradiation. The initial concentration of tetracycline solution was set to be 20 mg/L. The prepared heterojunctions exhibited superior photocatalytic activity compared with the parent MgSn(OH)6 and SnO2 compounds. Among them, the obtained MgSn(OH)6/SnO2 heterojunction with MgCl2·6H2O:SnCl4·5H2O = 4:5.2 (mmol) displayed the highest photocatalytic performance and the photodegradation efficiency conversion of 91% could be reached after 60 min under ultraviolet irradiation. The prepared heterojunction maintained its performance after four successive cycles of use. Active species trapping experiments demonstrated that holes were the dominant active species. Hydroxyl radicals and superoxide ions had minor effects on the photocatalytic oxidation of tetracycline. Photoelectrochemical measurements were used to investigate the photocatalytic mechanism. The enhancement of photocatalytic activity could be assigned to the formation of a type-II junction photocatalytic system, which was beneficial for efficient transfer and separation of photogenerated electrons and holes. This research provides an in situ growth strategy for the design of highly efficient photocatalysts for environmental restoration.

Facile synthesis of silver nanoparticles in a crosslinked polymeric system by in situ reduction method for catalytic reduction of 4-nitroaniline

2018 ◽  
Vol 40 (15) ◽  
pp. 2027-2036 ◽  
Author(s):  
Zahoor H. Farooqi ◽  
Rida Khalid ◽  
Robina Begum ◽  
Umar Farooq ◽  
Qingshi Wu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Reduction Method ◽  
Catalytic Reduction ◽  
Polymeric System ◽  
In Situ Reduction ◽  
Facile Synthesis

scholarly journals In situ structural modification of graphitic carbon nitride by alkali halides and influence on photocatalytic activity

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 32592-32600 ◽  
Author(s):  
Yan Xu ◽  
Yinyan Gong ◽  
Hui Ren ◽  
Wenbo Liu ◽  
Lengyuan Niu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Charge Carrier ◽  
Basal Plane ◽  
Carbon Nitride ◽  
Structural Modification ◽  
Photocatalytic Performance ◽  
Alkali Halides ◽  
Thermal Condensation ◽  
Carrier Transfer

Introducing alkali halides during thermal condensation of melamine disturbs periodic ordering in the basal plane, reduces the band gap, and facilitates charge carrier transfer and separation, and thus enhances the photocatalytic performance of g-C3N4.

scholarly journals Triangular and Prism-Shaped Gold-Zinc Oxide Plasmonic Nanostructures: In situ Reduction, Assembly, and Full-Range Photocatalytic Performance

2019 ◽  
Vol 2019 (27) ◽  
pp. 3228-3234 ◽  
Author(s):  
Bruno Bottega-Pergher ◽  
Javier Graus ◽  
Carlos J. Bueno-Alejo ◽  
Jose L. Hueso
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Performance ◽  
Full Range ◽  
Plasmonic Nanostructures ◽  
In Situ Reduction

scholarly journals Enhanced Photocatalytic Activity of Electrospun β-Ga2O3 Nanofibers via In-Situ Si Doping Using Tetraethyl Orthosilicate

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1005 ◽  
Author(s):  
Tae Hee Yoo ◽  
Heejoong Ryou ◽  
In Gyu Lee ◽  
Byung Jin Cho ◽  
Wan Sik Hwang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Oxidation Potential ◽  
Si Doping ◽  
Defect Sites ◽  
Electrospinning Method ◽  
Ultraviolet C ◽  
Si Doped ◽  
High Reduction

β-Ga2O3 has attracted considerable attention as an alternative photocatalyst to replace conventional TiO2 under ultraviolet-C irradiation due to its high reduction and oxidation potential. In this study, to enhance the photocatalytic activity of β-Ga2O3, nanofibers are formed via the electrospinning method, and Si atoms are subsequently doped. As the Si concentration in the β-Ga2O3 nanofiber increases, the optical bandgap of the β-Ga2O3 nanofibers continuously decreases from 4.5 eV (intrinsic) to 4.0 eV for the Si-doped (2.4 at. %) β-Ga2O3 nanofibers, and accordingly, the photocatalytic activity of the β-Ga2O3 nanofibers is enhanced. This higher photocatalytic performance with Si doping is attributed to the increased doping-induced carriers in the conduction band edges. This differs from the traditional mechanism in which the doping-induced defect sites in the bandgap enhance separation and inhibit the recombination of photon-generated carriers.

Preparation of Hybrid Hydrogel Containing Ag Nanoparticles by a Green in Situ Reduction Method

Langmuir ◽  
2012 ◽  
Vol 28 (30) ◽  
pp. 11188-11194 ◽  
Author(s):  
Bihua Xia ◽  
Qianling Cui ◽  
Fang He ◽  
Lidong Li
Keyword(s):  
Ag Nanoparticles ◽  
Reduction Method ◽  
In Situ Reduction ◽  
Hybrid Hydrogel
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