Boosting acetone oxidation efficiency over MnO2 nanorods by tailoring crystal phases

2019 ◽  
Vol 43 (48) ◽  
pp. 19126-19136 ◽  
Author(s):  
Li Cheng ◽  
Jinguo Wang ◽  
Chi Zhang ◽  
Bei Jin ◽  
Yong Men
Keyword(s):  
Crystal Phase ◽  
Crystal Phases ◽  
Oxidation Efficiency ◽  
Catalytic Performances

MnO2 nanorods with different crystal phases (e.g. α-, β- and γ-MnO2) exhibited distinct crystal-phase dependent catalytic performances for acetone oxidation.

scholarly journals Liquid crystal phase transitions in suspensions of mineral colloids: new life from old roots

2013 ◽  
Vol 371 (1988) ◽  
pp. 20120263 ◽  
Author(s):  
H. N. W. Lekkerkerker ◽  
G. J. Vroege
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Colloidal Suspensions ◽  
Crystal Phase ◽  
Liquid Crystal Phase ◽  
Future Developments ◽  
Mineral Particles ◽  
Crystal Phases ◽  
Liquid Crystal Phases

A review is given of the field of mineral colloidal liquid crystals : liquid crystal phases formed by individual mineral particles within colloidal suspensions. Starting from their discovery in the 1920s, we discuss developments on the levels of both fundamentals and applications. We conclude by highlighting some promising results from recent years, which may point the way towards future developments.

Crystal phase-dependent electrocatalytic hydrogen evolution performance of ruthenium–boron intermetallics

2020 ◽  
Vol 56 (20) ◽  
pp. 3061-3064 ◽  
Author(s):  
Xu Zou ◽  
Lina Wang ◽  
Xuan Ai ◽  
Hui Chen ◽  
Xiaoxin Zou
Keyword(s):  
Hydrogen Evolution ◽  
Crystal Phase ◽  
Crystal Phases ◽  
Activity Trends

Four crystal phases of ruthenium–boron intermetallics, including Ru7B3, RuB, Ru2B3 and RuB2, are selectively synthesized and their activity trends toward the HER are investigated.

Crystal phase effect upon O2 activation on gold surfaces through intrinsic strain

Nanoscale ◽  
2019 ◽  
Vol 11 (31) ◽  
pp. 14587-14591 ◽  
Author(s):  
Lixiang Zhong ◽  
Shuzhou Li
Keyword(s):  
Crystal Phase ◽  
Gold Surfaces ◽  
Phase Effect ◽  
O2 Activation ◽  
Crystal Phases ◽  
Intrinsic Strain

Different crystal phases have remarkably different surface reactivities due to their distinct intrinsic surface strains even for close-packed surfaces.

scholarly journals Macrophage Polarization Related to Crystal Phases of Calcium Phosphate Biomaterials

2021 ◽  
Vol 22 (20) ◽  
pp. 11252
Author(s):  
Linghao Xiao ◽  
Yukari Shiwaku ◽  
Ryo Hamai ◽  
Kaori Tsuchiya ◽  
Keiichi Sasaki ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Inflammatory Response ◽  
Macrophage Polarization ◽  
Ion Concentration ◽  
Crystal Phase ◽  
M2 Macrophage ◽  
M1 Macrophage ◽  
Crystal Phases ◽  
Anti Inflammatory ◽  
Excessive Inflammatory Response

Calcium phosphate (CaP) materials influence macrophage polarization during bone healing. However, the effect of the crystal phase of CaP materials on the immune response of bone remains unclear. In this study, the effect of the crystal phases of CaP materials on the regulation of macrophage polarization was investigated. Human THP-1 cells and mouse RAW 264 cells were cultured with octacalcium phosphate (OCP) and its hydrolyzed form Ca-deficient hydroxyapatite to assess the expression of pro-inflammatory M1 and anti-inflammatory M2 macrophage-related genes. OCP inhibited the excessive inflammatory response and switched macrophages to the anti-inflammatory M2 phenotype, which promoted the expression of the interleukin 10 (IL10) gene. In contrast, HL stimulated an excessive inflammatory response by promoting the expression of pro-inflammatory M1 macrophage-related genes. To observe changes in the microenvironment induced by OCP and HL, inorganic phosphate (Pi) and calcium ion (Ca2+) concentrations and pH value in the medium were measured. The expression of the pro-inflammatory M1 macrophage-related genes (tumor necrosis factor alpha (TNFα) and interlukin 1beta (IL1β)) was closely related to the increase in ion concentration caused by the increase in the CaP dose. Together, these results suggest that the microenvironment caused by the crystal phase of CaP materials may be involved in the immune-regulation capacity of CaP materials.

scholarly journals Electrospun PVDF–TiO2 with tuneable TiO2 crystal phases: synthesis and application in photocatalytic redox reactions

2017 ◽  
Vol 5 (2) ◽  
pp. 641-648 ◽  
Author(s):  
Jeannie Z. Y. Tan ◽  
Natalita M. Nursam ◽  
Fang Xia ◽  
Yen Bach Truong ◽  
Ilias Louis Kyratzis ◽  
...  
Keyword(s):  
Phase Composition ◽  
Redox Reactions ◽  
Photocatalytic Reduction ◽  
Crystal Phase ◽  
Crystal Phases

The TiO2 crystal phase composition and microstructure of electrospun PVDF–TiO2 membranes affected the photocatalytic reduction of CO2.

Tuning Shape and Crystal-Phase of TiO2 Nanoparticles for Catalysis

2021 ◽  
Author(s):  
Wenning Zhao ◽  
Yong Li ◽  
Wenjie Shen
Keyword(s):  
Tio2 Nanoparticles ◽  
Heterogeneous Catalysts ◽  
Crystal Phase ◽  
Highly Efficient ◽  
Crystal Phases

Synthesis of TiO2 nanoparticles with tunable shape and crystal-phase has attracted considerable attention for the design of highly efficient heterogeneous catalysts. Tailoring the shape of TiO2, in the crystal-phases of...

Self-assembly of pseudorotaxane films with thermally reversible crystal phases and optical properties

2014 ◽  
Vol 2 (11) ◽  
pp. 2061-2068 ◽  
Author(s):  
Ya-Ching Tsai ◽  
Kai-Jen Chen ◽  
Chun-Jen Su ◽  
Wei-Ru Wu ◽  
U-Ser Jeng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Self Assembly ◽  
Crystal Phase ◽  
Thermally Driven ◽  
Crystal Phase Transition ◽  
Crystal Phases

Ferrocene-containing pseudorotaxane films undergo thermally driven self-assembly and reversible crystal phase transition.

Alternative Crystallization Phases in Sub-Micron Droplets of Fe-Ni Alloys

1985 ◽  
Vol 43 ◽  
pp. 46-47
Author(s):  
Yeon-Wook Kim ◽  
Thomas F. Kelly
Keyword(s):  
Liquidus Temperature ◽  
Metastable Phase ◽  
Phase 1 ◽  
Primary Crystallization ◽  
Supercooled Liquid ◽  
Nucleation Temperature ◽  
Crystal Phase ◽  
Liquid Volume ◽  
Ni Alloys ◽  
Crystal Phases

When a liquid becomes highly supercooled, the crystal phases that nucleate from it may be one of several alternatives other than the primary crystallization phase. Even though these crystal phases would be metastable at the liquidus temperature of the primary crystallization phase, they may or may not be the most stable crystal phase at the nucleation temperature. Thus the term “metastable phase” is not generally applicable and the name “alternative crystallization phase” (ACP) is used.In order to determine whether a particular crystal phase may nucleate in a supercooled liquid, it is not sufficient to determine simply which phase has the greater liquidus temperature. The effect of liquid supercooling (relative to the liquidus temperature of each phase) on the nucleation of each possible phase must be considered. For a given situation (eg. liquid volume, cooling rate,…), the propensity of a given phase for nucleating from the supercooled liquid can be gauged by calculating a nucleation temperature for that phase [1].

Crystal phase-selective synthesis of intermetallic palladium borides and phase-regulated (electro)catalytic properties

2022 ◽  
Author(s):  
Zhenyu Li ◽  
Linmin Zhao ◽  
Hui Chen ◽  
Xiao Liang ◽  
Xuan Ai ◽  
...  
Keyword(s):  
Water Splitting ◽  
Catalytic Properties ◽  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Crystal Phase ◽  
Selective Synthesis ◽  
Suzuki Coupling Reaction ◽  
Catalytic Activities ◽  
Crystal Phases ◽  
Electrochemical Water Splitting

Three crystal phases of Pd-B intermetallics, including Pd6B, Pd5B2 and Pd2B, are synthesized, and their phase-dependent catalytic activities toward electrochemical water splitting and Suzuki coupling reaction are studied. In both...

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