Liang Sun

Southern University of Science and Technology

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Papers

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i-10 index

Research Trends

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Co-Authors

Zhicheng Shi

Ocean University of China

Jiufeng Dong

Southern University of Science and Technology

Zizhao Pan

Southern University of Science and Technology

Hong Wang

Shandong University

Yujuan Niu

Southern University of Science and Technology

Runhua Fan

Shanghai Maritime University

Li Li

Pennsylvania State University

Wenyan Zhai

Xi'an Shiyou University

Huanlei Wang

Ocean University of China

Davoud Dastan

Cornell University

Cooperative Institutions

Southern University of Science and Technology

Xi'an Jiaotong University

Chinese Academy of Sciences

Xi'an Shiyou University

Sichuan University

University of Chinese Academy of Sciences

Ocean University of China

Xi'an University of Technology

Harbin Institute of Technology

Tsinghua University

Author Statistics

Papers

Citation

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i-10 index

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Influences of molecular structures on the spectral properties and photostability of rhodamine dyes

Research Square (Research Square) (2023)

Yudong Liu Fan Chen Liang Sun Zhizhong Zhang Shunzhou Chang

Abstract Although the syntheses and applications of rhodamine dyes have been extensively researched, the photophysical properties and photostability have rarely been studied. In this study, we systematically investigated the photophysical properties and photostability of six rhodamine dyes by the spectrum measurements, photodegradation experiments and theoretical calculations. It was found that the following structural modifications can lead to the redshift of absorption and fluorescence emission spectra: Increasing the alkyls of amino on xanthene; forming rigid ring between the N-linked alkyl and xanthene; esterification of –COOH on benzene ring. The degradation experiments under 525 nm light irradiation indicated that increasing the alkyls of amino on xanthene improves the photostability, fixing the N-linked alkyls on the xanthene ring to form rigid rings would significantly reduce the photostability of rhodamine dyes, and the esterification of –COOH on benzene ring can increase the photostability to some extent. The results of DFT calculations showed that the esterification of − COOH decreases the dihedral angle D 1 and increases D 2 , the variation trend of calculated absorption and emission wavelengths is consistent with the measured results, and the rhoodamine dyes with higher electrophilic index usually have higher photostability.

Xanthene

Rhodamine

Photodegradation

Rhodamine B

Dihedral angle

10.21203/rs.3.rs-2578761/v1

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Citations (0)

Investigation on Recrystallization of Cu-Nb Micro-composites by the Method of Resistance

Physics Procedia (2013)

Ming Liang Y.F. Lu Liang Sun X.Y. Xu P.F. Wang

In this paper, high strength and high conductivity Cu-18%vol.Nb micro-composites were fabricated by the bundling and drawing process. The materials experienced severe plastic deformation during the repeating bundling process, which accumulated plenty of dislocations and vacancies among Cu/Nb interface, Cu matrix and Nb filaments. The morphology of Cu matrix recrystallization has been observed. And it exhibits great difference between Cu at the edge area and that adjoining Nb filaments. Resistance measurements are introduced to realize the recrystallization behaviour of this kind of materials. The introduction of Nb elements to Cu shown great influence on the form of dislocations and deformation twins, and resistivity of Cu matrix varies significantly with the addition of filaments connecting with changes of defect density.

Recrystallization (geology)

10.1016/j.phpro.2013.04.063

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Citations (3)

Suppressing the loss and enhancing the breakdown strengths of high-k materials via constructing layered structure

Materials Letters (2022)

Shuimiao Xia Zhicheng Shi Liang Sun Shengbiao Sun Davoud Dastan

Dielectric strength

Dielectric loss

Leakage (economics)

10.1016/j.matlet.2022.131654

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Citations (33)

Influence of Ti3AlC2 content and load on the tribological behaviors of Ti3AlC2p/Al composites

Ceramics International (2021)

Wenyan Zhai Bowei Pu Liang Sun Liujie Xu Yiran Wang

Abrasion (mechanical)

Energy-dispersive X-ray spectroscopy

10.1016/j.ceramint.2021.09.254

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Citations (12)

Effect of compound technology on polyethylene/ montmorillonite composites

Junguo Gao Ning Guo Yali Liu Jing Li Haitao Hu

The dielectric properties of nanometric dielectrics have attracted much attention since John Lewis published the article; the title is ldquoNanometric Dielectricsrdquo, on IEEE transactions on dielectric and electrical insulation in 1994. However, the majority of works reported in the literature were involved in comparing the dielectric properties of polymer/inorganic nano-particles composites those of with polymer/inorganic micro-particles composites, and investigation on dielectric properties of polymer layered silicate (PLS) nano-composites, which exhibit excellent thermal and mechanical properties, were rarely found to be reported. The paper investigates the effect of dielectric property of nano-montmorillonite transnature polyethylene (PE), the polyethylene/montmorillonite (PE/MMT) nano-composites are prepared by melting intercalation process. The dielectric properties of the nano-composites are investigated, and then the space charge profile in PE/MMT and PE is measured by pulsed electro-acoustic (PEA) method respectively. The test results indicate that the involvement of nano-MMT can decrease the amount of space charge in dielectric The AC breakdown strength can be enhanced.

10.1109/icpadm.2009.5252157

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Citations (5)

Superior Capacitive Energy Storage Enabled by Molecularly Interpenetrating Interfaces in Layered Polymers

Advanced Materials (2024)

Liang Sun Fengyuan Zhang Li Li Jiajie Liang Jiufeng Dong

Abstract Polymer dielectrics are essential for advanced electronics and electrical power systems, yet they suffer from low energy density ( U e ) due to their low dielectric constant ( K ) and the inverse relationship between K and breakdown stength ( E b ). Here a scalable approach utilizing the designed molecularly interpenetrating interfaces is presented to achieve all‐organic dielectric polymers with high U e and charge–dischage efficiency ( η ). Distinctive intermolecular interactions and microstructural changes, as demonstrated experimentally and theoretically, are introduced by the molecularly interpenetrating interfaces, resulting in simultaneous improvements in dielectric responses and mechanical strength while inhibiting electrical conduction – outcomes unattainable in conventional layered polymers. Consequently, exceptional improvments in both K and E b are achieved, yielding a very high U e of 22.89 J cm −3 with η ≥ 90%, outperforming current layered polymer dielectrics. The bilayers can be easily fabricated into large‐area films with high uniformity and outstanding capacitive stability (>500 000 cycles), offering a practical route to scalable high‐ U e polymer dielectrics for electrical energy storage.

High-κ dielectric

10.1002/adma.202412561

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Citations (1)

Enhanced high-temperature energy storage properties of polymer composites by interlayered metal nanodots

Journal of Materials Chemistry A (2022)

Shuai Li Jiufeng Dong Yujuan Niu Li Li Feng Wang

The PC-Au nanodots-PC heterojunction film with merely 0.0035 vol% of Au nanodots exhibited a superior U e (6.25 J cm −3 ) and η (86.6%) at 150 °C, far surpassing those of the reported advanced polymers and nanocomposite dielectrics.

Nanodot

High energy

10.1039/d2ta03155h

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Citations (27)

Layer-structured BaTiO₃/P(VDF–HFP) composites with concurrently improved dielectric permittivity and breakdown strength toward capacitive energy-storage applications

Journal of Materials Chemistry C (2020)

Liang Sun Zhicheng Shi Liang Liang Shuang Wei Huanlei Wang

Layer-structured nanocomposites with concurrently improved dielectric permittivity and breakdown strength, as well as superior energy-storage performances are obtained.

Dielectric strength

10.1039/d0tc01801e

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Citations (98)

An overview of hydrogen production from Al-based materials

Nanotechnology Reviews (2023)

Liang Sun Xiongshuai Ji Yong Zhou Hang Li Wenyan Zhai

Abstract A profound overview of the recent development for on-time, on-demand hydrogen production from light metal-based hydrolysis is presented. Hydrogen energy is one of the clean and renewable energy sources which has been recognized as an alternative to fossil fuels. In addition, aluminum is the most suitable light activity metal for hydrolysis materials attributed to its safety, environmental friendliness, high-energy density, inexpensive, and low density with high strength ratio. In general, dense oxide films formed act as a barrier on aluminum surfaces. Accordingly, effective removal of the oxide film is a key measure in solving the Al–water reaction. In this review, recent advances in addressing the main drawbacks including high-purity aluminum with acid–alkali solutions, nano-powders of aluminum or composite with acid–base solutions, ball-milled nano-powders, alloying blocks, and gas atomization powders are summarized. The characteristics of these three technologies and the current research progress are summarized in depth. Moreover, it is essential to promote low-cost aluminum-based materials based on effective hydrogen production efficiency and explore ways for practical large-scale applications.

Aluminum Oxide

Energy carrier

10.1515/ntrev-2022-0521

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Citations (2)

Enhancing high-temperature capacitor performance of polymer nanocomposites by adjusting the energy level structure in the micro-/meso-scopic interface region

Nano Energy (2022)

Jiufeng Dong Renchao Hu Yujuan Niu Liang Sun Liuting Li

Polymer nanocomposite

Dielectric strength

10.1016/j.nanoen.2022.107314

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Citations (84)