Ruixiang Wang

Beijing University of Civil Engineering and Architecture

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Meibo Xing

Beijing University of Civil Engineering and Architecture

Qing Shen

University of Electro-Communications

Shuzi Hayase

University of Electro-Communications

Chao Ding

Shandong University

Rong Xu

Sichuan University

Yaohong Zhang

National University of Defense Technology

Youjun Fan

Guangxi Normal University

Taro Toyoda

Kyoto University

Feng Liu

Shandong University

Taizo Masuda

Toyota Motor Corporation (Japan)

Cooperative Institutions

Chinese Academy of Sciences

Beijing University of Civil Engineering and Architecture

Jiangxi University of Science and Technology

University of Electro-Communications

University of Chinese Academy of Sciences

Tsinghua University

Guangxi Normal University

Xi'an Jiaotong University

Southwest University of Science and Technology

Shanghai Jiao Tong University

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Study on the performance of ZMO/PbS quantum dot heterojunction solar cells

Solar Energy (2020)

Meibo Xing Yuyao Wei Ruixiang Wang Zhentao Zhang

Lead sulfide

Active layer

10.1016/j.solener.2020.11.023

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Citations (14)

Application of fullerene C60 nano-oil for performance enhancement of domestic refrigerator compressors

International Journal of Refrigeration (2013)

Meibo Xing Ruixiang Wang Jianlin Yu

Mineral oil

Synthetic oil

10.1016/j.ijrefrig.2013.12.004

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Citations (130)

Stronger Coupling of Quantum Dots in Hole Transport Layer Through Intermediate Ligand Exchange to Enhance the Efficiency of PbS Quantum Dot Solar Cells

Small Methods (2024)

Yuyao Wei Chao Ding Guozheng Shi Huan Bi Yusheng Li

Abstract Nowadays, the extensively used lead sulfide (PbS) quantum dot (QD) hole transport layer (HTL) relies on layer‐by‐layer method to replace long chain oleic acid (OA) ligands with short 1,2‐ethanedithiol (EDT) ligands for preparation. However, the inevitable significant volume shrinkage caused by this traditional method will result in undesired cracks and disordered QD arrangement in the film, along with adverse increased defect density and inhomogeneous energy landscape. To solve the problem, a novel method for EDT passivated PbS QD (PbS‐EDT) HTL preparation using small‐sized benzoic acid (BA) as intermediate ligands is proposed in this work. BA is substituted for OA ligands in solution followed by ligand exchange with EDT layer by layer. With the new method, smoother PbS‐EDT films with more ordered and closer QD packing are gained. It is demonstrated stronger coupling between QDs and reduced defects in the QD HTL owing to the intermediate BA ligand exchange. As a result, the suppressed nonradiative recombination and enhanced carrier mobility are achieved, contributing to ≈20% growth in short circuit current density ( J sc ) and a 23.4% higher power conversion efficiency (PCE) of 13.2%. This work provides a general framework for layer‐by‐layer QD film manufacturing optimization.

Lead sulfide

Benzoic acid

10.1002/smtd.202400015

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Citations (4)

Research on Preparation Method of Sulfonated Coal

Henan Chemical Industry (2004)

Ruixiang Wang

The preparation methods of sulfonated coal and factors such as sulfonation time, sulfonation temperature and ratio of acid to coal etc. influencing the ion-exchange activities of the products are studied. The optimal reaction conditions are as follows : sulfonation temperature 120～160 ℃, time 10h, and the mass ratio of acid to coal 4 ∶1.

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The Ecological Study on Simulation and Analysis of Low-Temperature Air-Source Heat Pumps as Alternatives to Coal Stove Heating for Rural Dwellings in Northern China

Ekoloji (2018)

Zhengsheng Wu Ruixiang Wang Shuhui Xu

With development of era, there was a lack of professional guidance in local new village construction, and it led to some problems in rural areas, including serious resource waste, increase energy consumption, ecological destruction, and so on. In this study, the method for calculating the energy consumption and carbon dioxide emissions of air-source heat pump (ASHP) heating systems in low-temperature environments was established. Next, using this model, the energy consumption and carbon dioxide emissions of ASHPs, wall-mounted gas boilers, regional coal-fired boilers, and electric heating systems were simulated and compared. The simulation results show that the ASHP system has significant advantages in terms of energy saving and emission reduction. Finally, a combination of actual monitoring data showed that ASHPs have practical application for heating in the BeijingTianjinHebei region of China. The measurement data indicated that during the entire heating season, the coefficients of performance (COPs) of the four heating systems were 1.98, 2.33, 2.07, and 2.06, respectively, proving that ASHPs are a feasible alternative to coal stove heating in the BeijingTianjinHebei region of China.

Stove

Heating system

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Preparation and Methanol Electrooxidation of Pt/PMo<sub>12</sub>/PEDOT/GC Electrodes

Deleted Journal (2013)

Jing-hua MA Ruixiang Wang Yi-Liang Tan Shan-shan WANG Yan-qin ZHANG

Modification of phosphomolybdic acid (PMo12) on poly(3,4-ethylenedioxythiophene) (PEDOT) film (PEDOT/GC) obtained through the electrochemical polymerization was performed using adsorption method (PMo12/PEDOT/GC), followed by electrodepositing Pt on PMo12/PEDOT/GC to prepare Pt/PMo12/PEDOT/GC electrode. Effects of PMo12 and PEDOT on the methanol oxidation performance of electrode were investigated. Results showed that PMo12 obviously changed the morphology and structure of Pt loaded on the electrode, leading to the formation of sharp thorns at the edge of Pt nanostructures. Cyclic voltammetry and chronoamperometry data demonstrated that the catalytic activities of methanol electrooxidation on the Pt/PMo12/PEDOT/GC and Pt/PEDOT/GC electrodes were higher than that on Pt/C, and the former exhibited the best performance. It was found that the presence of PEDOT not only increased the current, but also lowered the onset potential towards methanol oxidation. After further modification of PMo12, the current of methanol oxidation was significantly increased, while the onset potential of methanol oxidation remained unaffected.

Chronoamperometry

10.61558/2993-074x.2109

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PVP-Assisted Iron-Doped ZIF-8 as an Efficient Fe-N-C Oxygen Reduction Electrocatalyst for Zinc-Air Batteries

Journal of The Electrochemical Society (2022)

Ruixiang Wang Yanyang Wang Zheqin Chen Xiaocong Zhong Yongmin Xie

Transition metal/nitrogen carbon composite (M/NC) is a highly active oxygen reduction reaction (ORR) electrocatalyst, widely used in fuel cells and zinc-air batteries. Herein, a uniform and regular PVP-assisted iron-doped nano dodecahedron (ZP 0.1 F/NC) is prepared by a simple and efficient one-step in-solution reaction, followed by controlled in situ pyrolysis. The synthesized electrocatalyst showed excellent electrocatalytic ORR activity in an alkaline medium. Compared with standard 20% Pt/C electrocatalyst, ZP 0.1 F/NC exhibited onset potential (E onset ) (0.974 V vs 0.967 V), half-wave potential (E 1/2 ) (0.861 V vs 0.857 V) and the limiting current density (j d ) was 6.373 mA cm −2 vs 5.401 mA cm −2 , also better than the Fe doped ZIF-8 nitrogen composite (ZF/NC), PVP auxiliary ZIF-8 (ZP 0.1 /NC) and pure ZIF-8 nitrogen composite (Z/NC) synthesized by the same procedure. In addition, the zinc-air battery assembled with ZP 0.1 F/NC also exhibits outstanding discharge capacity, with a specific capacity and energy density of 793.3 mAh g −1 and 974.9 Wh kg Zn − 1 , respectively, much higher than that of commercial 20% Pt/C-based zinc-air battery (719.8 mAh g −1 , 842.6 Wh kg Zn − 1 ), indicating its great potential in practical energy conversion and storage.

10.1149/1945-7111/ac797f

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Citations (1)

Does the oxophilic effect serve the same role for hydrogen evolution/oxidation reaction in alkaline media?

Nano Energy (2019)

Linfan Shen Bang‐An Lu Ximing Qu Jin‐yu Ye Junming Zhang

Reaction rate

Electronic effect

10.1016/j.nanoen.2019.05.045

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Citations (82)

Experimental study on spraying mechanisms of the gas–liquid internal flow in an air-assisted nozzle

Physics of Fluids (2024)

KaiQiang Duan Haifeng Wu Yahui Hao Xiaofei Chai Ruixiang Wang

Air-assisted nozzles are widely used in many industrial fields. For example, in artificial snowmaking systems, air-assisted nozzles can provide a key promoting role for the nucleation and crystallization of snow. To reveal how spray behavior depends on the internal flow patterns of air-assisted nozzles, we designed an experimental platform to observe the two-phase flow inside the nozzle. The results show that the internal flow pattern of the nozzle exhibits an annular flow pattern, forming a continuous hollow conical spray. As the gas–liquid pressure ratio (GLRP) increases, the interfacial disturbance waves gradually disappear at the gas–liquid interface of the internal flow, indicating a transition from a more turbulent to a more stable flow regime. As the gas core expands, the liquid film thickness gradually decreases, promoting finer atomization and a more uniform droplet distribution. This transition from a disturbed wave pattern to a stable annular flow enhances the uniformity of the droplet distribution and the stability of the spray. When GLRP increases from 20% to 67%, the uniformity of droplet distribution improves by 17%, and the stability is enhanced by 60%. Additionally, this study examines the link between internal flow patterns and atomization, providing a dimensionless formula that correlates nozzle flow dynamics with spray quality based on experimental and simulation data. This contributes valuable insights for optimizing air-assisted nozzle design for superior spray performance.

10.1063/5.0226160

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Current density improvement of colloidal PbS quantum dot solar cells by adding NaCl in ZnO electron transport layer

Energy Reports (2020)

Yuyao Wei Meibo Xing Dandan Wang Ruixiang Wang

In this work, the effect of adding sodium chloride (NaCl) in zinc oxide (ZnO) electron transport layer (ETL) on the photovoltaic performance of lead sulfide (PbS) quantum dot (QD) solar cells is investigated. To elucidate that, PbS QD solar cells with pristine ZnO and NaCl passivated ZnO (ZnO–NaCl) as ETLs are fabricated, respectively. The current density–voltage (J–V) measurements are performed. The results show a considerable improvement in the current density of the device with ZnO–NaClas ETL, thus boosting the power conversion efficiency (PCE) from 7.278% to 9.149%. It is demonstrated that NaCl treatment benefits surface defects and series resistance (Rs) reduction in ZnO ETL, enhancing the carrier transport performance of the device. The strategy of adding NaCl in ZnO ETL provides a promising way for pushing solar cell performance to a high level.

Lead sulfide

Equivalent series resistance

10.1016/j.egyr.2020.08.033

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Citations (10)