scholarly journals Hydrothermal synthesis of hierarchical boehmite (γ-AlOOH) hollow microspheres with highly active surface

AIP Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 065209
Author(s):  
Fang Wang ◽  
Xue Yuan ◽  
Dengwu Wang
Keyword(s):  
Hydrothermal Synthesis ◽  
Active Surface ◽  
Hollow Microspheres ◽  
Highly Active

Highly active and poison-tolerant nickel catalysts for tar reforming synthesized through controlled hydrothermal synthesis

2020 ◽  
Vol 607 ◽  
pp. 117779 ◽  
Author(s):  
Dara Khairunnisa Binte Mohamed ◽  
Andrei Veksha ◽  
Teik-Thye Lim ◽  
Grzegorz Lisak
Keyword(s):  
Hydrothermal Synthesis ◽  
Nickel Catalysts ◽  
Highly Active ◽  
Tar Reforming

Hydrothermal synthesis of Sn-Beta zeolites in F−-free medium

2018 ◽  
Vol 5 (11) ◽  
pp. 2763-2771 ◽  
Author(s):  
Hao Xu ◽  
Xudong Wang ◽  
Peng Ji ◽  
Haihong Wu ◽  
Yejun Guan ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Lewis Acid ◽  
Crystal Size ◽  
Acid Catalysts ◽  
Free Medium ◽  
Lewis Acid Catalysts ◽  
Structure Directing Agent ◽  
Highly Active ◽  
Beta Zeolites

Sn-Beta zeolites, with high Sn content and smaller crystal size, hydrothermally synthesized in F−-free medium using N-cyclohexyl-N,N-dimethylcyclohexanaminium hydroxide as the structure-directing agent with the assistance of Na+ and seed, are highly active as Lewis acid catalysts.

scholarly journals Catalytic Activity of Oxidation-Reduction Pre-Treated Ni3Al for Methane Steam Reforming

2010 ◽  
Vol 89-91 ◽  
pp. 645-650 ◽  
Author(s):  
Ya Xu ◽  
Dong Hyun Chun ◽  
Jun Hyuk Jang ◽  
Masahiko Demura ◽  
Dang Moon Wee ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Active Surface ◽  
Methane Steam Reforming ◽  
Reduction Treatment ◽  
Highly Active ◽  
Methane Steam ◽  
Oxidation Reduction ◽  
Pre Treatment ◽  
Oxidation In Air

The catalytic activity of oxidation-reduction pre-treated Ni3Al powder for methane steam reforming was examined. The oxidation-reduction pre-treatment consisted of two steps: oxidation in air at various temperatures from 973 to 1373 K, and then followed by reduction in H2 at 873 K. It was found that the oxidation-reduction treatments significantly reduced the onset temperature of activity, i.e., improved the activity of Ni3Al powder at low temperatures. The characterization of Ni3Al surface showed that an outer surface layer of fine NiO particles were formed on the surface of Ni3Al after oxidation. These NiO particles were reduced to metallic Ni by the subsequent reduction treatment, resulting in the high activity for methane steam reforming. These results indicate that the Ni3Al can form highly active surface structure with oxidation-reduction treatment, having excellent heat resistance.

Hydrothermal synthesis of SnO2 hollow microspheres

2005 ◽  
Vol 59 (19-20) ◽  
pp. 2563-2565 ◽  
Author(s):  
Fanglin Du ◽  
Zhiyan Guo ◽  
Guicun Li
Keyword(s):  
Hydrothermal Synthesis ◽  
Hollow Microspheres

scholarly journals Facile One-Step Hydrothermal Synthesis of the rGO@Ni3V2O8 Interconnected Hollow Microspheres Composite for Lithium-Ion Batteries

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2389
Author(s):  
Faizan Ghani ◽  
In Wook Nah ◽  
Hyung-Seok Kim ◽  
JongChoo Lim ◽  
Afifa Marium ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Lithium Ion Batteries ◽  
High Surface ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
High Energy ◽  
Hollow Microspheres ◽  
High Energy Density ◽  
Layered Crystal ◽  
One Step

Low-cost, vanadium-based mixed metal oxides mostly have a layered crystal structure with excellent kinetics for lithium-ion batteries, providing high energy density. The existence of multiple oxidation states and the coordination chemistry of vanadium require cost-effective, robust techniques to synthesize the scaling up of their morphology and surface properties. Hydrothermal synthesis is one of the most suitable techniques to achieve pure phase and multiple morphologies under various conditions of temperature and pressure. We attained a simple one-step hydrothermal approach to synthesize the reduced graphene oxide coated Nickel Vanadate (rGO@Ni3V2O8) composite with interconnected hollow microspheres. The self-assembly route produced microspheres, which were interconnected under hydrothermal treatment. Cyclic performance determined the initial discharge/charge capacities of 1209.76/839.85 mAh g−1 at the current density of 200 mA g−1 with a columbic efficiency of 69.42%, which improved to 99.64% after 100 cycles. High electrochemical performance was observed due to high surface area, the porous nature of the interconnected hollow microspheres, and rGO induction. These properties increased the contact area between electrode and electrolyte, the active surface of the electrodes, and enhanced electrolyte penetration, which improved Li-ion diffusivity and electronic conductivity.

Hydroxyapatite nanosheet-assembled porous hollow microspheres: DNA-templated hydrothermal synthesis, drug delivery and protein adsorption

2012 ◽  
Vol 22 (42) ◽  
pp. 22642 ◽  
Author(s):  
Chao Qi ◽  
Ying-Jie Zhu ◽  
Bing-Qiang Lu ◽  
Xin-Yu Zhao ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Hydrothermal Synthesis ◽  
Protein Adsorption ◽  
Hollow Microspheres

scholarly journals Copolymer‐Derived N/B Co‐Doped Nanocarbons with Controlled Porosity and Highly Active Surface

2020 ◽  
Vol 58 (1) ◽  
pp. 225-232
Author(s):  
Rui Yuan ◽  
Han Wang ◽  
Mingkang Sun ◽  
Jay Whitacre ◽  
Krzysztof Matyjaszewski ◽  
...  
Keyword(s):  
Active Surface ◽  
Highly Active ◽  
Controlled Porosity ◽  
Co Doped

Tailored polymer–metal fractal nanocomposites: an approach to highly active surface enhanced Raman scattering substrates

2009 ◽  
Vol 20 (32) ◽  
pp. 325705 ◽  
Author(s):  
Abhijit Biswas ◽  
Ilker S Bayer ◽  
Daminda H Dahanayaka ◽  
Lloyd A Bumm ◽  
Zhongrui Li ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Active Surface ◽  
Surface Enhanced Raman Scattering ◽  
Highly Active ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polymer Metal ◽  
Enhanced Raman Scattering
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