Fenglou Sun

South Central University for Nationalities

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Xiang He

Chinese Academy of Sciences

Xintang Huang

Central China Normal University

Jinping Liu

Wuhan University of Technology

Yuhua Zhang

Zhejiang Cancer Hospital

Jinlin Li

South China University of Technology

Jingping Hong

State Ethnic Affairs Commission

Kamal Mahir Sulieman

Universiti Teknologi MARA

Yuanyuan Li

Chinese Academy of Sciences

Jiaping Lan

South Central University for Nationalities

Zhengping Zhu

Minzu University of China

Cooperative Institutions

South Central University for Nationalities

Chinese Academy of Sciences

State Ethnic Affairs Commission

Minzu University of China

University of Chinese Academy of Sciences

Hunan University

Huazhong University of Science and Technology

Tongji University

Shanghai Jiao Tong University

Central China Normal University

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Solution-Based Growth and Optical Properties of Self-Assembled Monocrystalline ZnO Ellipsoids

The Journal of Physical Chemistry B (2006)

Jinping Liu Xintang Huang Kamal Mahir Sulieman Fenglou Sun Xiang He

Self-assembled unusual ZnO ellipsoids have been grown by a facile low-temperature (60 °C) solution process on a large scale. FESEM and TEM reveal that these ellipsoids have an average horizontal axis of 1.5 μm and a longitudinal axis of 0.6 μm. Experimental results obtained from the early growth stage demonstrate that the ZnO ellipsoidal structures are single crystals and formed from direct "oriented attachment" of two types of building blocks, that is, nanorods and nanoparticles. It is further found that the existence of poly(ethylene glycol) (PEG-10 000) is vital to the formation of the complex microparticles. Raman spectrum, room-temperature photoluminescence, and UV−vis absorption spectra are also discussed. This work presents a simple and effective route for large-scale fabrication of single-crystal ZnO ellipsoids with micrometer-scale sizes and 3D self-assembled structures.

Nanorod

Ellipsoid

Micrometer

10.1021/jp056880r

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Citations (78)

Absorption UV and Visible Spectrum of Ti-O Films Affected by O Content

Surface Technology (2010)

Fenglou Sun

Visible spectrum

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Developing a new mode for observation of ionospheric disturbances by digital ionosonde in ionospheric vertical sounding

Radio Science (2012)

Kun Chen Zhengping Zhu Baiqi Ning Jiaping Lan Fenglou Sun

Detecting Doppler frequency shifts from ionospheric high‐frequency echoes is an important way to study ionospheric disturbances. This paper presents and realizes a new mode for observation of ionospheric disturbances using a combination of coded pulses and echo phase measurement analysis in ionospheric vertical sounding based on the Canadian Advanced Digital Ionosonde (CADI) platform. Experimental results show that the newly developed mode for observation of ionospheric disturbances on CADI can acquire accurate Doppler ionogram (Dopplionogram) and obtain temporal and spatial variations of the velocity of ionospheric disturbances in real time so that it has essential value in observation and research of ionospheric disturbances. The application of the new mode for observation of ionospheric disturbances in ionospheric vertical sounding opens up a new, effective way by which much more ionospheric information can be acquired with existing common ionospheric sounding instruments.

Ionosonde

Ionogram

Ionospheric sounding

Mode (computer interface)

10.1029/2011rs004968

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Citations (4)

Plasma Assisted Preparation of CoPt/SiO₂ Fischer‐Tropsch Catalysts: A Comparison of the Precursor Pre‐Thermal Treated Temperatures

Energy Technology (2018)

Chen Liu Hao Liu Bo Wang Jingping Hong Fuzhen Zhao

Abstract A series of amorphous silica supported Co‐based catalysts were prepared using traditional incipient wetness impregnation methods followed by thermal treatment at different temperatures. Glow discharge plasma effects on cobalt species in the forms of cobalt nitrate, mixture of cobalt nitrate and Co 3 O 4 , and pure Co 3 O 4 were compared and investigated by various characterizations and Fischer‐Tropsch synthesis (FTS) tests. Plasma enhancing metal dispersion effect was mostly happened during the decomposition of cobalt nitrate in plasma field; when cobalt species was already in the form of Co 3 O 4 , no apparent particle size change by plasma treatment was observed. Under the promotion of Pt, all the catalysts maintained at high reduction degree, thus the cobalt dispersion was almost linearly related to the number of active sites. The CoSi‐100D+P catalyst with both high cobalt dispersion and high cobalt reducibility, had the maximum number of active sites, and presented the highest FTS activity. Meanwhile, the product selectivity could also be affected by plasma treatment, hydrocarbons were shifted to lower carbon numbers. This effect could be observed even on the CoSi‐400C+P sample, in which the precursor was pre‐thermal treated at high temperature (400 °C), and cobalt species was already all transformed into Co 3 O 4 .

Fischer–Tropsch process

Incipient wetness impregnation

10.1002/ente.201800669

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Citations (9)

Vertically Aligned 1D ZnO Nanostructures on Bulk Alloy Substrates: Direct Solution Synthesis, Photoluminescence, and Field Emission

The Journal of Physical Chemistry C (2007)

Jinping Liu Xintang Huang Yuanyuan Li Xiaoxu Ji Zikun Li

We report a highly effective growth of vertically aligned ZnO one-dimensional (1D) nanostructures on conducting alloy substrate (Fe−Co−Ni) in mild solutions (T ≤ 70 °C) in the absence of any seeds, catalysts, and surfactants. The growth conditions such as NH3·H2O concentration, temperature, and nature of the substrate are correlated to affect the nanostructure formation. Different ZnO single-crystal nanostructures including nanoneedles, hexagonal nanorods, and nanopencils oriented normal to the substrate can be selectively formed in high quantity. The ordered ZnO nanostructures show strong UV excitonic emissions and good field emission (FE) properties. Other metal substrates such as Ti and Ni are also proven to be effective for ZnO nanoarray growth. Since metal substrates are much more economical and scalable than Si, sapphire/Al2O3, GaN, etc., we believe that our approach presents a general economical route toward mass production of controllable ZnO arrays and will facilitate flexible design of device architectures for nanoelectronics.

Nanorod

Nanoelectronics

10.1021/jp067782o

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Citations (147)

Hierarchical nanostructures of cupric oxide on a copper substrate: controllable morphology and wettability

Journal of Materials Chemistry (2006)

Jinping Liu Xintang Huang Yuanyuan Li Kamal Mahir Sulieman Xiang He

We have demonstrated a facile fabrication of CuO hierarchical nanostructures on copper substrates by the oxidation of copper in alkaline conditions at 60 °C. CuO flowerlike structures composed of hierarchical two-dimensional (2D) nanosheets and spherical architectures constructed by ultrathin nanowalls of ∼10 nm in thickness could be selectively generated by simply immersing a copper substrate into different alkaline solutions (NaOH and NH3·H2O). The continuous supply of Cu2+ from the substrate, as well as the reaction temperature, has shown its importance for the self-assembled growth of tiny 2D nanosheets and nanowalls into intricate hierarchical nanostructures. Optical absorption was used to determine the band gap energies of the nanostructures. Stable superhydrophobicity was firstly observed for these nanostructured films after modification. When the concentration of solution was changed, well-defined 2D nanosheet and nanowall arrays can accordingly be fabricated on a large scale. Our method might provide a general route towards the preparation of novel hierarchical films on metal substrates (Cu, Al, Zn, etc.), for which a number of promising applications in various fields can be envisioned.

Nanosheet

Copper oxide

Morphology

10.1039/b611691d

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Citations (187)

Passive observation mode study in ionospheric vertical sounding

Zhengping Zhu Kun Chen Fenglou Sun Baigi Ning Weixing Wan

This paper details a new passive observation mode in ionospheric vertical sounding based on CADI ionosonde platform. The realization of the new observation mode not only alleviate the congestion problem of the ionospheric high frequency channel, but also provide a economical and effective method for the ionosphere monitoring and studying.

Ionosonde

Ionogram

Mode (computer interface)

Realization (probability)

Ionospheric sounding

10.1109/isape.2008.4735494

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F3 layer feature under low and medium solar activity observed at a Chinese low latitude station Fuke

Advances in Space Research (2013)

Zhengping Zhu Kun Chen Jiaping Lan Fenglou Sun

Ionosonde

Ionogram

Low latitude

Magnetic dip

10.1016/j.asr.2013.03.031

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Citations (5)

Influence of Electrode Properties on Optoelectrical Performance of Heterojunction OLEDs

Bandaoti guangdian (2007)

Fenglou Sun

Vacuum evaporation

Source

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Study of surface modification on PTFE by plasma

Chemical engineer (2006)

Fenglou Sun

The mechanism of surface modification on polymer by plasma technology is dissertated and the study progresses of surface modification on PTFE are introduced in this paper.Assumption and prospect are brought forward.

Surface Modification

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