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Browsing by Author "Yang, Yongzhen"
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Characteristics and Potential Applications of Nano-enhanced Phase Change Materials: A Critical Review on Recent Developments
Hayat, Muhammad; CHEN, Yong Kang; Bevilacqua, Mose; Li, Liang; Yang, Yongzhen (2022-03-01)Owing to incessant proliferation of challenges pertaining to energy storage systems to attain optimum design and efficient performance, massive research is underway on the development of optimal storage medium (used to ... -
The effects of surface modifications of multiwalled carbon nanotubes on their dispersibility in different solvents and poly(ether ether ketone)
Cao, Zongshuang; Qiu, Li; Yang, Yongzhen; Chen, Yong; Liu, Xuguang (2014-11)The effects of surface modifications of multi-walled carbon nanotubes (MWCNTs) on their dispersibility in different solvents and poly (ether ether ketone) (PEEK) have been studied. MWCNTs were treated by mixed acids to ... -
An Efficient Synthesis and Photoelectric Properties of Green Carbon Quantum Dots with High Fluorescent Quantum Yield
Zheng, Jingxia; Xie, Yanting; Wei, Yingying; Yang, Yongzhen; Liu, Xuguang; CHEN, Yong Kang; Xu, Bingshe (2020-01-01)To greatly improve the production quality and efficiency of carbon quantum dots (CQDs), and provide a new approach for the large-scale production of high-quality CQDs, green carbon quantum dots (g-CQDs) with high product ... -
Enhancing Thermal Energy Storage in Buildings with Novel Functionalised MWCNTs-Enhanced Phase Change Materials: Towards Efficient and Stable Solutions
Hayat, Muhammad; CHEN, Yong Kang; Yang, Yongzhen; Li, Liang; Bevilacqua, Mose (2024-01-01)Phase change materials (PCMs) are a promising panacea to tackle the intermittency of renewable energy sources, but their thermal performance is limited by low thermal conductivity (TC). This pioneering work investigates ... -
Fluorescent carbon quantum dots synthesized by chemical vapor deposition: : An alternative candidate for electron acceptor in polymer solar cells
Cui, Bo; Yan, Lingpeng; Gu, Huimin; Yang, Yongzhen; Liu, Xuguang; Ma, Chang-Qi; Chen, Yong; Jia, Husheng (2018-01-01)Excitation-wavelength-dependent blue-greenish fluorescent carbon quantum dots (CQDs) with graphite structure were synthesized by chemical vapor deposition (CVD) method. In comparison with those synthesized by hydrothermal ... -
One-step hydrothermal synthesis of fluorescence carbon quantum dots with high product yield and quantum yield
Yanting Xie, Yanting; Zheng, Jingxia; Wang, Yaling; Wang, Junli; Yang, Yongzhen; Liu, Xuguang; Chen, Yong (2019-01-02)A one-step hydrothermal synthesis of nitrogen and silicon co-doped fluorescence carbon quantum dots (N,Si-CQDs), from citric acid monohydrate and silane coupling agent KH-792 with a high product yield (PY) of 52.56% and ... -
Preparation and thermophysical characterisation analysis of potential nano-phase transition materials for thermal energy storage applications
Hayat, Muhammad; Yang, Yongzhen; Li, Liang; Bevilacqua, Mose; CHEN, Yong Kang (2023-04-15)The efficacious use of phase change materials (PCMs) is mainly confined by their poor thermal conductivity (TC). In this study, multiwalled carbon nanotubes (MWCNTs), graphene nanoplatelets (GNP) and titanium oxide (TiO2) ... -
Preparation of N-doped carbon dots based on starch and their application in white LED
Liu, Xinghua; Zheng, Jingxia; Yang, Yongzhen; Chen, Yong; Liu, Xuguang (2018-12-01)N-doped carbon dots (CDs) were synthesized simply and economically by a one-step hydrothermal method using starch as a carbon source and ethylenediamine (EDA) as a nitrogen dopant. The prepared CDs possess the properties ... -
A study of surface modifications of carbon nanotubes on the properties of polyamide 66/multiwalled carbon nanotube composites
Qiu, Li; Chen, Yong; Yang, Yongzhen; Xu, Lihua; Liu, Xuguang (2013-10-29)The effects of surface modification of carbon nanotube on the properties of polyamide 66/multiwalled carbon nanotube composites have been investigated. Polyamide 66 (PA66) and multiwalled carbon nanotubes (MWCNTs) composites ... -
The surface modifications of multi-walled carbon nanotubes for multi-walled carbon nanotube/poly (ether ether ketone) composites
Cao, Zongshuang; Qiu, Li; Yang, Yongzhen; Chen, Yong; Liu, Xuguang (2015-10-30)The effects of surface modifications of multi-walled carbon nanotubes (MWCNTs) on the morphology, dynamic mechanical and tribological properties of multi-walled carbon nanotube/poly(ether ether ketone) (MWCNT/PEEK) composites ... -
Surface Morphology Evolution Mechanisms of InGaN/GaN Multiple Quantum Wells with Mixture N2/H2-Grown GaN Barrier
Zhou, Xiaorun; Lu, Taiping; Zhu, Yadan; Zhao, Guangzhou; Dong, Hailiang; Jia, Zhigang; Yang, Yongzhen; Chen, Yong; Xu, Bingshe (2017-05-16)Surface morphology evolution mechanisms of InGaN/GaN multiple quantum wells (MQWs) during GaN barrier growth with different hydrogen (H2) percentages have been systematically studied. Ga surface-diffusion rate, stress ... -
Temperature and magnetism bi-responsive molecularly imprinted polymers: Preparation, adsorption mechanism and properties as drug delivery system for sustained release of 5-fluorouracil
Li, Longfei; Chen, Lin; Zhang, Huan; Yang, Yongzhen; Liu, Xuguang; Chen, Yong (2016-04-01)Temperature and magnetism bi-responsive molecularly imprinted polymers (TMMIPs) based on Fe3O4-encapsulating carbon nanospheres were prepared by free radical polymerization, and applied to selective adsorption and controlled ...