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590 results on '"Li-Hua Huo"'

2. Hexaaquacobalt(II) tetraaquabis(2-aminopyrazine-κN4)cobalt(II) disulfate dihydrate

Author

Seik Weng Ng, Shan Gao, Li-Hua Huo, and Wei Kang

Subjects
Crystallography, QD901-999
Abstract

The reaction of cobalt(II) sulfate and 2-aminopyrazine affords the title salt, [Co(H2O)6][Co(C4H5N3)2(H2O)4](SO4)2·2H2O. The metal atoms in the tetraaqua-coordinated and hexaaqua-coordinated complex cations lie on centers of inversion in slightly distorted octahedral geometries. The cations, anions and solvent water molecules are linked by O—H...O, O—H...N and N—H...O hydrogen bonds into a three-dimensional network.

Published
2009
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3. Tetrakis(2-aminopyrazine-κN4)dichloridocobalt(II)

Author

Shan Gao, Seik Weng Ng, Li-Hua Huo, and Wei Kang

Subjects
Crystallography, QD901-999
Abstract

The CoII atom in the title complex, [CoCl2(C4H5N3)4], exists in an all-trans Cl2N4Co octahedral geometry. The CoII atom lies on a special position of 2 site symmetry. Adjacent molecules are linked by N—H...N and N—H...Cl hydrogen bonds into a three-dimensional network.

Published
2009
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4. 4-Hydroxypyridinium hydrogen sulfate

Author

Seik Weng Ng, Shan Gao, Ying-Ming Xu, and Li-Hua Huo

Subjects
Crystallography, QD901-999
Abstract

The crystal structure of the title salt, C5H6NO+·HSO4−, consists of planar(r.m.s. deviation = 0.001 Å) 4-hydroxypyridinium cations and hydrogen sulfate anions which are hydrogen bonded into a layer motif. In the anion, the S—O bond [1.551 (2) Å] involving the O atom bearing the acid H atom is longer than the other three S—O bonds, which range from 1.437 (1) to 1.454 (1) Å.

Published
2009
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5. 1,4-Bis(2-pyridyliminomethyl)benzene

Author

Li-Hua Huo, Shan Gao, and Seik Weng Ng

Subjects
Crystallography, QD901-999
Abstract

In the crystal structure of the title compound, C18H14N4, the molecule assumes overline{1} site symmetry with the centroid of the benzene ring located on the inversion center. The molecule is almost flat, with a dihedral angle of 2.70 (9)° between the pyridine and benzene rings.

Published
2009
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6. Tetraaquabis(4-formylbenzoato-κO)cobalt(II) tetrahydrate

Author

Seik Weng Ng, Li-Hua Huo, Shan Gao, and Zhao-Peng Deng

Subjects
Crystallography, QD901-999
Abstract

The CoII atom in the title compound, [Co(C8H5O3)2(H2O)4]·4H2O, which exists in an all-trans octahedral coordination geometry, lies on a center of inversion. The coordinated and uncoordinated water molecules engage in extensive hydrogen-bonding interactions, forming a three-dimensional hydrogen-bonded network.

Published
2008
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7. Diaquabis(4-formylbenzoato-κO)zinc(II)

Author

Seik Weng Ng, Li-Hua Huo, Shan Gao, and Zhao-Peng Deng

Subjects
Crystallography, QD901-999
Abstract

The ZnII atom in the title compound, [Zn(C8H5O3)2(H2O)2], which lies on a twofold rotation axis, is coordinated by two monodentate carboxylate groups and two water molecules in a tetrahedral geometry; the geometry is distorted towards octahedral owing to two long Zn...Ocarbonyl contacts [2.512 (2) Å]. Hydrogen-bonding interactions give rise to a three-dimensional network. The formyl group is disordered approximately equally over two positions.

Published
2008
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8. Aqua(4-hydroxybenzoato-κO)(4-hydroxybenzoato-κ2O,O′)(1,10-phenanthroline-κ2N,N′)zinc(II) monohydrate

Author

Seik Weng Ng, Li-Hua Huo, Shan Gao, and Li-Li Kong

Subjects
Crystallography, QD901-999
Abstract

The Zn atom in the title compound, [Zn(C7H5O3)2(C12H8N2)(H2O)]·H2O, exists in a distorted cis-ZnN2O4 octahedral coordination geometry. One of the 4-hydroxybenzoate anions chelates in a bidentate manner whereas the other is monodentate. The complex molecules are linked through the uncoordinated water molecules into a hydrogen-bonded sheet structure.

Published
2008
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9. Aquachloridobis(1,10-phenanthroline-κ2N,N′)zinc(II) chloride N,N-dimethylformamide solvate

Author

Seik Weng Ng, Li-Hua Huo, Shan Gao, and Li-Li Kong

Subjects
Crystallography, QD901-999
Abstract

The Zn atom in the title salt, [ZnCl(C12H8N2)2(H2O)]Cl·C3H7NO, is chelated by two phenanthroline molecules and is bonded to one chloride ion and one water molecule, resulting in a ZnN4ClO octahedral coordination environment with the Cl and O atoms in a cis conformation. The cations and anions are linked by O—H...Cl hydrogen bonds across a center of inversion, forming a hydrogen-bonded dimeric association. The dimethylformamide solvent molecule is disordered over two orientations in a 0.56 (1):0.44 (1) ratio.

Published
2008
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10. The one-dimensional polymer poly[[aqua(2,2′-bipyridine)cadmium(II)]-μ-trans-stilbene-4,4′-dicarboxylato]

Author

Huan-Yu Wang, Shan Gao, Li-Hua Huo, and Jing-Gui Zhao

Subjects
Crystallography, QD901-999
Abstract

In the title polymer, [Cd(C16H10O4)(C10H8N2)(H2O)]n, the CdII ion is in a strongly distorted octahedral geometry, being coordinated by two N atoms from a 2,2′-bipyridine ligand, three carboxylate O atoms from two symmetry-related trans-stilbene-4,4′-dicarboxylate dianions and one water molecule. The stilbene ligand lies on an inversion centre at the midpoint of the central C=C bond. This feature generates the polymeric structure: adjacent CdII ions are bridged by trans-stilbene-4,4′-dicarboxylate dianions, giving rise to a one-dimensional structure. The coordinated water molecule is involved in interchain O—H...O hydrogen bonds.

Published
2008
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11. Physical and Structural Design of Fast Extraction Kickers for CSNS/RCS

Author

Lei, Wang, Wen, Kang, Yao-Dou, Hao, Yuan, Chen, and Li-Hua, Huo

Subjects
Physics - Accelerator Physics
Abstract

China Spallation Neutron Source (CSNS) is a high intensity beam facility being built now in China. Three kicker assemblies, eight pulsed magnets, will be used in the CSNS rapid circle synchrotron (RCS). The physical and structural designs of eight kicker magnets that are grouped in 5 different types are presented. The results of OPERA-3D simulation show that magnet center field integral meet the physics requirements of design by choosing a suitable magnet coil structure. Field uniformity for 60% width is +/-0.7%. The ferrite magnet structure and composition is introduced, and the high voltage feedthrough design, the installation of six magnets in long vacuum cavity design is discussed., Comment: 4 pages, 9 figures

Published
2013

18. A highly sensitive and selective nitric oxide/butanone temperature-dependent sensor based on waste biomass-derived mesoporous SnO2 hierarchical microtubes

Author

Bao-Yu Song, Cheng Li, Xian-Fa Zhang, Rui Gao, Xiao-Li Cheng, Zhao-Peng Deng, Ying-Ming Xu, Li-Hua Huo, and Shan Gao

Subjects
Renewable Energy, Sustainability and the Environment, General Materials Science, General Chemistry
Abstract

Waste biomass-derived mesoporous SnO2 hierarchical microtubes are fabricated as temperature-dependent dual-functional gas sensor.

Published
2022

29. In-situ controllable assembly of 3D ZnO-ZnS heterojunction nanotube arrays for enhancing NO2-sensing performance at low energy consumption and sensing mechanism

Author

Rui Gao, Xianfa Zhang, Yuanyuan Wu, Gao Shan, Li-Hong Liu, Yingming Xu, Xiaoli Cheng, Ming Zheng, Xin Zhou, and Li-Hua Huo

Subjects
Materials Chemistry, Metals and Alloys, Electrical and Electronic Engineering, Condensed Matter Physics, Instrumentation, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published
2023

30. Porous Cr

Author

Bao-Yu, Song, Xian-Fa, Zhang, Jing, Huang, Xiao-Li, Cheng, Zhao-Peng, Deng, Ying-Ming, Xu, Li-Hua, Huo, and Shan, Gao

Abstract

How to achieve high sensing of Cr

Published
2022

31. Biotemplate-Directed Synthesis of Cr2o3 Mesoporous Monotubes for Enhanced Sensing to Trace H2s Gas

Author

Bao-Yu Song, Li-Hong Liu, Ming Yang, Xian-Fa Zhang, Zhao-Peng Deng, Ying-Ming Xu, Li-Hua Huo, and Shan Gao

Subjects
History, Polymers and Plastics, Materials Chemistry, Metals and Alloys, Electrical and Electronic Engineering, Business and International Management, Condensed Matter Physics, Instrumentation, Industrial and Manufacturing Engineering, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published
2022

40. Biotemplate-Inherited Porous Sno2 Monotubes with Oxygen Vacancies for Ultra-High Response and Fast Detection of Nitric Oxide at Low Temperature

Author

Bao-Yu Song, Cheng Li, Ming-Song Lv, Xian-Fa Zhang, Zhao-Peng Deng, Yingming Xu, Li-Hua Huo, and Shan Gao

Subjects
History, Polymers and Plastics, Materials Chemistry, Metals and Alloys, Electrical and Electronic Engineering, Business and International Management, Condensed Matter Physics, Instrumentation, Industrial and Manufacturing Engineering, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published
2022

43. Biotemplate synthesis of single crystal MoO3 hierarchical tubules assembled from nano-rectangles for conductometric sensing of diisopropylamine vapor

Author

Jia-Bin Sun, Wei-Xin Liu, Ya-Nan Li, Bao-Yu Song, De-Rui Kong, Jin-Xin Ye, Xian-Fa Zhang, Zhao-Peng Deng, Ying-Ming Xu, Li-Hua Huo, and Shan Gao

Subjects
Materials Chemistry, Metals and Alloys, Electrical and Electronic Engineering, Condensed Matter Physics, Instrumentation, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published
2023

44. Facilely controlled synthesis of porous ZnO nanotubes with rich oxygen vacancies for highly sensitive and selective detection of NO2 at low temperature

Author

Ming-Song Lv, Cheng Li, Ya-Nan Li, Xian-Fa Zhang, Zhao-Peng Deng, Xiao-Li Cheng, Ying-Ming Xu, Li-Hua Huo, and Shan Gao

Subjects
Materials Chemistry, Metals and Alloys, Electrical and Electronic Engineering, Condensed Matter Physics, Instrumentation, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published
2023

46. Mesoporous SnO2 nanospheres sensor for fast detection of HCHO and its application in safety detection of aquatic products

Author

Xiangbo Ma, Rui Gao, Tao Zhang, Xuemei Sun, Ting Li, gao shan, Xianfa Zhang, yingming Xu, Xiaoli Cheng, and Li-Hua Huo

Subjects
History, Polymers and Plastics, Materials Chemistry, Metals and Alloys, Business and International Management, Electrical and Electronic Engineering, Condensed Matter Physics, Instrumentation, Industrial and Manufacturing Engineering, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published
2023

50. Preparation of highly crystalline NiO meshed nanowalls via ammonia volatilization liquid deposition for H2S detection

Author

Chao Huang, Shan Gao, Hui Zhao, Yingming Xu, Xian-Fa Zhang, Wei Liu, Xiao-Li Cheng, Li-Hua Huo, and Ming Yang

Subjects
Materials science, Non-blocking I/O, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, law.invention, Biomaterials, Crystallinity, Nickel, Colloid and Surface Chemistry, Adsorption, Chemical engineering, chemistry, law, Deposition (phase transition), Calcination, 0210 nano-technology, Porosity, Single crystal
Abstract

Novel NiO meshed nanowalls, with characteristics of open geometry, porosity, single crystal and highly crystalline framework, are grown in situ on different substrates (including Al2O3 tube, glass slide, ITO, stainless steel mesh, nickel foam and carbon cloth) via a simple ammonia volatilization liquid deposition process at room temperature and a postcalcination treatment. The calcination temperature can strongly influence the pore size and crystallinity of the product, leading to different gas-sensing performances. The product that obtained at 700 °C (NiO-700) has the advantage in the combination of the largest pore size and high crystallinity, and shows the highest response to H2S gas. In 0.01–100 ppm H2S gas, the NiO-700 meshed nanowalls based sensor can give evident and reversible response signals at a low optimal operating temperature of 50 °C, the response towards 100 ppm H2S can reach to 137.3, the detection limit is as low as 10 ppb. Furthermore, the sensor also exhibits excellent selectivity, repeatability, anti-humidity and long-term stability for H2S detection. The results of gas chromatograph-mass spectrometry (GC-MS) and infrared gas analysis (IRGA) reveal that the H2S gas can be oxidized to SO2 after interacting with NiO-700 meshed nanowalls material. Therefore, the possible H2S sensing mechanism should be proposed as: H2S gas molecules undergo a redox reaction with adsorbed oxygen anion on the surface of NiO-700 meshed nanowalls to form SO2; meanwhile, the electrons restricted by adsorbed oxygen return to the bulk and recombine with the holes, resulting in a decrease in effective carrier concentration of holes and thus generating a change in resistance.

Published
2019

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