The facile hydrothermal synthesis of CuO@ZnO heterojunction nanostructures for enhanced photocatalytic hydrogen evolution

2019 ◽  
Vol 43 (17) ◽  
pp. 6794-6805 ◽  
Author(s):  
Yendrapati Taraka Prabhu ◽  
V. Navakoteswara Rao ◽  
Muthukonda Venkatakrishnan Shankar ◽  
Bojja Sreedhar ◽  
Ujjwal Pal
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Organic Pollutants ◽  
Zno Nanostructures ◽  
Photocatalytic Hydrogen Evolution ◽  
Modified Hydrothermal Method

CuO@ZnO nanostructures prepared via a modified hydrothermal method exhibited superior catalytic activity in the removal of organic pollutants and more efficient H2 production.

scholarly journals Hydrothermal synthesis of rhodium-doped barium titanate nanocrystals for enhanced photocatalytic hydrogen evolution under visible light

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 100123-100128 ◽  
Author(s):  
Shunta Nishioka ◽  
Kazuhiko Maeda
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Barium Titanate ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Doped Barium Titanate

Photocatalytic activity of Rh-doped BaTiO3 nanocrystals for hydrogen evolution from water under visible light (λ > 420 nm) was improved by applying a hydrothermal method for the preparation.

scholarly journals Microwave-Assisted vs. Conventional Hydrothermal Synthesis of MoS2 Nanosheets: Application towards Hydrogen Evolution Reaction

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1040 ◽  
Author(s):  
Getachew Solomon ◽  
Raffaello Mazzaro ◽  
Vittorio Morandi ◽  
Isabella Concina ◽  
Alberto Vomiero
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Crystal Morphology ◽  
Synthesis Method ◽  
Synthesis Methods ◽  
Mos2 Nanosheets ◽  
Microwave Assisted

Molybdenum sulfide (MoS2) has emerged as a promising catalyst for hydrogen evolution applications. The synthesis method mainly employed is a conventional hydrothermal method. This method requires a longer time compared to other methods such as microwave synthesis methods. There is a lack of comparison of the two synthesis methods in terms of crystal morphology and its electrochemical activities. In this work, MoS2 nanosheets are synthesized using both hydrothermal (HT-MoS2) and advanced microwave methods (MW-MoS2), their crystal morphology, and catalytical efficiency towards hydrogen evolution reaction (HER) were compared. MoS2 nanosheet is obtained using microwave-assisted synthesis in a very short time (30 min) compared to the 24 h hydrothermal synthesis method. Both methods produce thin and aggregated nanosheets. However, the nanosheets synthesized by the microwave method have a less crumpled structure and smoother edges compared to the hydrothermal method. The as-prepared nanosheets are tested and used as a catalyst for hydrogen evolution results in nearly similar electrocatalytic performance. Experimental results showed that: HT-MoS2 displays a current density of 10 mA/cm2 at overpotential (−280 mV) compared to MW-MoS2 which requires −320 mV to produce a similar current density, suggesting that the HT-MoS2 more active towards hydrogen evolutions reaction.

Modulating photogenerated electron transfer with selectively exposed Co–Mo facets on a novel amorphous g-C3N4/CoxMo1−xS2 photocatalyst

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23709-23717 ◽  
Author(s):  
Xuqiang Hao ◽  
Zhiliang Jin ◽  
Shixiong Min ◽  
Gongxuan Lu
Keyword(s):  
Electron Transfer ◽  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Photogenerated Electron ◽  
Photocatalytic Hydrogen Evolution ◽  
Exposed Facets

Novel photocatalysts, g-C3N4/Co0.04Mo0.96S2 with different exposed facets of Co–Mo, were employed as catalysts for the examination of facet-dependent catalytic activity toward photocatalytic hydrogen evolution.

Constructing a novel TiO2/γ-graphyne heterojunction for enhanced photocatalytic hydrogen evolution

2018 ◽  
Vol 6 (42) ◽  
pp. 20947-20955 ◽  
Author(s):  
Lulu Wu ◽  
Qiaodan Li ◽  
Chaofan Yang ◽  
Xiaoqing Ma ◽  
Zefan Zhang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Simple Hydrothermal Method

TiO2/γ-graphyne nanocomposites were successfully synthesizedviaa simple hydrothermal method, and demonstrated as a promising photocatalyst for hydrogen evolution.

Hydrothermal synthesis of octahedra-based layered niobium oxide and its catalytic activity as a solid acid

2014 ◽  
Vol 4 (12) ◽  
pp. 4250-4257 ◽  
Author(s):  
Toru Murayama ◽  
Junli Chen ◽  
Jun Hirata ◽  
Keeko Matsumoto ◽  
Wataru Ueda
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Layered Structure ◽  
Niobium Oxide ◽  
Solid Acid ◽  
Structure Type ◽  
Niobium Oxides

Layered-structure-type niobium oxides were synthesized by the hydrothermal method by using ammonium niobium oxalate as a precursor.

An innovative Au-CdS/ZnS-RGO architecture for efficient photocatalytic hydrogen evolution

2018 ◽  
Vol 6 (7) ◽  
pp. 2895-2899 ◽  
Author(s):  
Shuangshuang Kai ◽  
Baojuan Xi ◽  
Xiaolei Liu ◽  
Lin Ju ◽  
Peng Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Au Nanoparticles ◽  
One Pot ◽  
Hole Transfer ◽  
Photocatalytic Hydrogen Evolution ◽  
Semiconductor Junction ◽  
Electron Transportation

An innovative CdS/ZnS-RGO hybrid is synthesizedviaan one-pot hydrothermal method. The further introduction of Au nanoparticles enables the composite with the merits of heterostructured semiconductor/semiconductor junction benefiting the hole transfer, as well as graphene and noble metal favorable for electron transportation.

Hydrazine-assisted formation of ultrathin MoS2 nanosheets for enhancing their co-catalytic activity in photocatalytic hydrogen evolution

2017 ◽  
Vol 5 (15) ◽  
pp. 6981-6991 ◽  
Author(s):  
D. Amaranatha Reddy ◽  
Hanbit Park ◽  
Sangyeob Hong ◽  
D. Praveen Kumar ◽  
Tae Kyu Kim
Keyword(s):  
Electrical Conductivity ◽  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Active Sites ◽  
Mos2 Nanosheets ◽  
Photocatalytic Hydrogen Evolution ◽  
Ultrathin Mos2 Nanosheets

This work demonstrates a simple and effective approach using hydrazine to modulate the active sites and electrical conductivity of MoS2 with the aid of ultrasonication.

scholarly journals One-step hydrothermal synthesis of NiS/MoS2-rGO composites and their application as catalysts for hydrogen evolution reaction

2016 ◽  
Vol 09 (05) ◽  
pp. 1650058 ◽  
Author(s):  
Huaping Wu ◽  
Ye Qiu ◽  
Junma Zhang ◽  
Guozhong Chai ◽  
Congda Lu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Layer Structures ◽  
Reduced Graphene ◽  
One Step

The composites of sulphide and reduced graphene oxide (NiS/MoS2-rGO) were synthesized through a facile solvent-assisted hydrothermal method. The introduction of NiS was paramount not only in enhancing the conductivity of whole catalysts but also in modulating the layer structures of MoS2 with additional active sites. Moreover, the NiS and rGO functioned together in controlling the morphology of as-prepared composites, resulting in uniformly distributed NiS/MoS2 nanosheets perpendicular to rGO scaffold. This further contributed to the excellent hydrogen evolution performance of the composites with a small onset overpotential of 80[Formula: see text]mV and Tafel slope as low as 65[Formula: see text]mV/decade.

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