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102. Nitrate electroreduction to ammonia over TiO2@C/Fe2O3nanosheet arrays: Unraveling the impact of hydrothermal carbon

Author

Wu, Xuan, Ma, Aijing, Liu, Dan, Li, Xueqian, Zhou, Yingkang, Kuvarega, Alex T., Mamba, Bhekie B., Li, Hu, and Gui, Jianzhou

Abstract

Electrochemical nitrate reduction to ammonia (NRA) is considered a promising strategy for environmental protection and energy saving because it can simultaneously achieve nitrate wastewater treatment and ammonia synthesis. However, currently, this method suffers from the lack of efficient electrocatalysts. In this work, through a “killing two birds with one stone” strategy, a catalyst, TiO2@C/Fe2O3nanosheet arrays (NSAs), was fabricated by introducing hydrothermal carbon (HTC), which not only accelerates the charge transfer due to its good conductivity but also provides abundant oxygen vacancies owing to its nice reducibility, finally improving the NRA performance. Compared with TiO2/Fe2O3NSAs, TiO2@C/Fe2O3exhibited higher NRA performance with a nitrate conversion of 88.6%, ammonia selectivity of 83.4%, Faradaic efficiency of 85.3%, and ammonia yield of 0.2176 mmol h−1cm−2. Moreover, the retention of high activity in nine cyclic experiments confirmed the outstanding stability of TiO2@C/Fe2O3. Furthermore, the possible NRA reaction pathway was derived from the results of electrochemical quasi in situelectron spin resonance experiments, electrochemical in situattenuated total reflection Fourier transform infrared measurement and online differential electrochemical mass spectrometry. This feasible strategy of introducing an HTC interlayer may open new avenues for developing novel NRA electrocatalysts.

Published
2023
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104. Electron-ion collider in China

Author

Anderle, Daniele P., primary, Bertone, Valerio, additional, Cao, Xu, additional, Chang, Lei, additional, Chang, Ningbo, additional, Chen, Gu, additional, Chen, Xurong, additional, Chen, Zhuojun, additional, Cui, Zhufang, additional, Dai, Lingyun, additional, Deng, Weitian, additional, Ding, Minghui, additional, Feng, Xu, additional, Gong, Chang, additional, Gui, Longcheng, additional, Guo, Feng-Kun, additional, Han, Chengdong, additional, He, Jun, additional, Hou, Tie-Jiun, additional, Huang, Hongxia, additional, Huang, Yin, additional, KumeričKi, KrešImir, additional, Kaptari, L. P., additional, Li, Demin, additional, Li, Hengne, additional, Li, Minxiang, additional, Li, Xueqian, additional, Liang, Yutie, additional, Liang, Zuotang, additional, Liu, Chen, additional, Liu, Chuan, additional, Liu, Guoming, additional, Liu, Jie, additional, Liu, Liuming, additional, Liu, Xiang, additional, Liu, Tianbo, additional, Luo, Xiaofeng, additional, Lyu, Zhun, additional, Ma, Boqiang, additional, Ma, Fu, additional, Ma, Jianping, additional, Ma, Yugang, additional, Mao, Lijun, additional, Mezrag, Cédric, additional, Moutarde, Hervé, additional, Ping, Jialun, additional, Qin, Sixue, additional, Ren, Hang, additional, Roberts, Craig D., additional, Rojo, Juan, additional, Shen, Guodong, additional, Shi, Chao, additional, Song, Qintao, additional, Sun, Hao, additional, Sznajder, Paweł, additional, Wang, Enke, additional, Wang, Fan, additional, Wang, Qian, additional, Wang, Rong, additional, Wang, Ruiru, additional, Wang, Taofeng, additional, Wang, Wei, additional, Wang, Xiaoyu, additional, Wang, Xiaoyun, additional, Wu, Jiajun, additional, Wu, Xinggang, additional, Xia, Lei, additional, Xiao, Bowen, additional, Xiao, Guoqing, additional, Xie, Ju-Jun, additional, Xie, Yaping, additional, Xing, Hongxi, additional, Xu, Hushan, additional, Xu, Nu, additional, Xu, Shusheng, additional, Yan, Mengshi, additional, Yan, Wenbiao, additional, Yan, Wencheng, additional, Yan, Xinhu, additional, Yang, Jiancheng, additional, Yang, Yi-Bo, additional, Yang, Zhi, additional, Yao, Deliang, additional, Ye, Zhihong, additional, Yin, Peilin, additional, Yuan, C.-P., additional, Zhan, Wenlong, additional, Zhang, Jianhui, additional, Zhang, Jinlong, additional, Zhang, Pengming, additional, Zhang, Yifei, additional, Chang, Chao-Hsi, additional, Zhang, Zhenyu, additional, Zhao, Hongwei, additional, Chao, Kuang-Ta, additional, Zhao, Qiang, additional, Zhao, Yuxiang, additional, Zhao, Zhengguo, additional, Zheng, Liang, additional, Zhou, Jian, additional, Zhou, Xiang, additional, Zhou, Xiaorong, additional, Zou, Bingsong, additional, and Zou, Liping, additional

Published
2021
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115. Optical Excitation of a Nanoparticle Cu/p-NiO Photocathode Improves Reaction Selectivity for CO₂ Reduction in Aqueous Electrolytes

Author

DuChene, Joseph S., Tagliabue, Giulia, Welch, Alex J., Li, Xueqian, Cheng, Wen-Hui, and Atwater, Harry A.

Abstract

We report the light-induced modification of catalytic selectivity for photoelectrochemical CO₂ reduction in aqueous media using copper (Cu) nanoparticles dispersed onto p-type nickel oxide (p-NiO) photocathodes. Optical excitation of Cu nanoparticles generates hot electrons available for driving CO₂ reduction on the Cu surface, while charge separation is accomplished by hot-hole injection from the Cu nanoparticles into the underlying p-NiO support. Photoelectrochemical studies demonstrate that optical excitation of plasmonic Cu/p-NiO photocathodes imparts increased selectivity for CO₂ reduction over hydrogen evolution in aqueous electrolytes. Specifically, we observed that plasmon-driven CO₂ reduction increased the production of carbon monoxide and formate, while simultaneously reducing the evolution of hydrogen. Our results demonstrate an optical route toward steering the selectivity of artificial photosynthetic systems with plasmon-driven photocathodes for photoelectrochemical CO₂ reduction in aqueous media.

Published
2020

116. Characterizing Heterogeneity of Asphalt Mixture Based on Aggregate Particles Movements

Author

Li Xueqian, Jiupeng Zhang, Jianzhong Pei, and Weisi Ma

Subjects
Materials science, Aggregate (composite), Rut, Homogeneity (statistics), 0211 other engineering and technologies, 020101 civil engineering, 02 engineering and technology, Geotechnical Engineering and Engineering Geology, Lateral displacement, 0201 civil engineering, Asphalt, Particle, Axle load, Composite material, Displacement (fluid), 021101 geological & geomatics engineering, Civil and Structural Engineering
Abstract

In order to evaluate the movements characteristics of aggregate particles in asphalt mixture under loading and temperature effects and to study the heterogeneity of asphalt mixture, rutting tests were conducted. Firstly, AC-20, AC-25, SMA-20 and SMA-25 specimens with the baseline labeled on sections were selected to conduct rutting tests. Then the section images at different loading times and different temperature were handled by digital image processing to study the aggregate particle movement behavior by means of aggregate particle movement parameters. Finally, the asphalt mixture heterogeneity was analyzed by the defined heterogeneity area and homogeneity area. The results show that the longitudinal displacement of aggregates is significantly greater than the lateral displacement of aggregates under the standard axle load. The aggregate particles irregular movement area for gap-graded asphalt mixture is greater than dense-graded asphalt mixture at the same temperature and loading. And the temperature or loading increasing can lead to the increase of the heterogeneity area.

Published
2018

117. Electrodeposition of reduced graphene oxide with chitosan based on the coordination deposition method

Author

Shuai Ma, Zhang Zheng, Cai Xiuru, Yifeng Wang, Li Xueqian, Mingyang Liu, Chaoran Qin, and Yanjun Chen

Subjects
Materials science, coordination, Oxide, General Physics and Astronomy, 02 engineering and technology, lcsh:Chemical technology, 010402 general chemistry, lcsh:Technology, 01 natural sciences, reduced graphene oxide, Full Research Paper, law.invention, Chitosan, chemistry.chemical_compound, law, Deposition (phase transition), Nanotechnology, lcsh:TP1-1185, General Materials Science, nanocomposite films, Electrical and Electronic Engineering, lcsh:Science, Supercapacitor, Nanocomposite, lcsh:T, Graphene, 021001 nanoscience & nanotechnology, lcsh:QC1-999, 0104 chemical sciences, Nanoscience, Chemical engineering, chemistry, Dispersion stability, Electrode, electrodeposition, lcsh:Q, chitosan, 0210 nano-technology, lcsh:Physics
Abstract

The electrodeposition of graphene has drawn considerable attention due to its appealing applications for sensors, supercapacitors and lithium-ion batteries. However, there are still some limitations in the current electrodeposition methods for graphene. Here, we present a novel electrodeposition method for the direct deposition of reduced graphene oxide (rGO) with chitosan. In this method, a 2-hydroxypropyltrimethylammonium chloride-based chitosan-modified rGO material was prepared. This material disperses homogenously in the chitosan solution, forming a deposition solution with good dispersion stability. Subsequently, the modified rGO material was deposited on an electrode through codeposition with chitosan, based on the coordination deposition method. After electrodeposition, the homogeneous, deposited rGO/chitosan films can be generated on copper or silver electrodes or substrates. The electrodeposition method allows for the convenient and controlled creation of rGO/chitosan nanocomposite coatings and films of different shapes and thickness. It also introduces a new method of creating films, as they can be peeled completely from the electrodes. Moreover, this method allows for a rGO/chitosan film to be deposited directly onto an electrode, which can then be used for electrochemical detection.

Published
2018

119. Construction, stability and photodynamic germicidal efficacy of curcumin nanoemulsion stabilised with Maillard conjugate of Wpi‐Rha.

Author

Zhuang, Hong, Jiang, Xinyu, Wu, Sijia, Li, Xueqian, and Yan, Haiyang

Subjects
CURCUMIN, IONIC strength, WHEY proteins, PHOTODYNAMIC therapy, MAILLARD reaction
Abstract

Curcumin has excellent antioxidant and antibacterial properties. The poor solubility and easy degradation limit its application. The present investigation was aimed to prepare curcumin nanoemulsions (Cur‐Ne), employing homogeneous and ultrasonication for the encapsulation of curcumin to overcome these problems. Cur‐Ne stabilised using whey protein isolate and rhamnose conjugate (Wpi‐Rha) was prepared by Maillard reaction. Furthermore, the processing (i.e. ionic strength, heat and freeze‐thaw) and storage stability of Cur‐Ne were evaluated. Moreover, the bactericidal capacity of Cur‐Ne combined with photodynamic therapy (PDT) technology was estimated. Cur‐Ne was prepared successfully with the droplet size of 185.97 ± 6.65 nm, polydispersity index (PDI) of 0.21 ± 0.01, zeta potential of −35.17 ± 0.15mV and entrapment efficiency of 97.0 ± 0.07%. Meanwhile, Cur‐Ne was stable at different storage and processing conditions. In addition, the DPPH and ABTS radical scavenging rates of Cur‐Ne were 84.86 ± 0.24% and 99.63 ± 0.48%, respectively. At the adding amount of 5 μL of Cur‐Ne, the Cur‐Ne could deactivate the Escherichia coli and Staphylococcus aureus with the antibacterial rate of 99.05 ± 0.13% and 99.11 ± 0.18%, respectively. Curcumin loaded in nanoemulsion and combined with PDT provide new ideas for food storage and sterilisation. [ABSTRACT FROM AUTHOR]

Published
2022
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128. Effects of material characteristics on asphalt and filler interaction ability

Author

Li Xueqian, Guoqiang Liu, Jianzhong Pei, and Jiupeng Zhang

Subjects
050210 logistics & transportation, Filler (packaging), Materials science, 05 social sciences, 0211 other engineering and technologies, 02 engineering and technology, Shear (sheet metal), Rheology, Mechanics of Materials, Asphalt, 021105 building & construction, 0502 economics and business, Volume fraction, Composite material, Material properties, Filler particle, Civil and Structural Engineering, Asphaltene
Abstract

Asphalt and filler interaction plays a key role on the performances of asphalt mastics and mixtures, while the asphalt and filler interaction ability is in turn affected by the material characteristics. In order to analyse the effects of material characteristics on asphalt and filler interaction, two kinds of matrix asphalt binders and three kinds of fillers were used to prepare asphalt mastics with different filler volume fractions. The dynamic shear rheological properties of these asphalt mastics were measured. The evaluation index K–B–G* was calculated subsequently to analyse the effects of material characteristics on the asphalt and filler interaction ability. The results show that filler volume fraction, filler particle size, SiO2 content and asphalt components had various levels of effects on the asphalt and filler interaction ability. Variance analysis was then conducted to rank these influencing factors from high to low as: (1) filler particle size, (2) asphaltene and resins content, (3) f...

Published
2017

129. Characterizing the three-stage rutting behavior of asphalt pavement with semi-rigid base by using UMAT in ABAQUS

Author

Jianzhong Pei, Li Xueqian, Jun Chen, Cunzhen Zhu, and Jiupeng Zhang

Subjects
Engineering, Three stage, business.industry, Rut, Constitutive equation, 0211 other engineering and technologies, Base (geometry), 020101 civil engineering, 02 engineering and technology, Building and Construction, 0201 civil engineering, Axle, Asphalt pavement, Asphalt, 021105 building & construction, Service life, General Materials Science, Geotechnical engineering, business, Civil and Structural Engineering
Abstract

A reliable UMAT subroutine of selected constitutive model of asphalt mixture is developed and applied to characterize the three-stage rutting behavior of asphalt pavement by using ABAQUS. It is indicated that the heavier traffic load not only induces the greater rutting depth, but also accelerates the rutting rate, causing the pavement earlier enter into rutting failure with shortened service life. The damage evolution and axle-load conversion are further discussed. Results show that the pavement subjected to heavier axle loads has the greater damage and faster damage evolution. The axle-load conversion index is 5.97 according to rut equivalence principle.

Published
2017

135. Protective effect of troxerutin and cerebroprotein hydrolysate injection on cerebral ischemia through inhibition of oxidative stress and promotion of angiogenesis in rats

Author

Ma, Wenbing, primary, Wang, Shixiang, additional, Liu, Xuanlin, additional, Tang, Fengru, additional, Zhao, Peipei, additional, Cheng, Kai, additional, Zheng, Qiaowei, additional, Zhuo, Yingchen, additional, Zhao, Xue, additional, Li, Xueqian, additional, and Feng, Weiyi, additional

Published
2019
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139. Biological activity, limitations and steady-state delivery of functional substances for precision nutrition

Author

Cui, Guoxin, Yu, Xiaoting, He, Ming, Huang, Shasha, Liu, Kangjing, Li, Yu, Li, Jiaxuan, Shao, Xiaoyang, Lv, Qiyan, Li, Xueqian, and Tan, Mingqian

Abstract

Food-related functional substances with biological activity serve as a crucial material foundation for achieving precision nutrition, which has gained increasing attraction in regulating physiological functions, preventing chronic diseases, and maintaining human health. Nutritional substances typically include bioactive proteins, peptides, polysaccharides, polyphenols, functional lipids, carotenoids, probiotics, vitamins, saponins, and terpenes. These functional substances play an essential role in precise nutrition. This chapter introduces and summarizes typical functional substances to demonstrate the challenges in precision nutrition for their stability, solubility, and bioavailability. The current status of delivery systems of functional substances is described to give an insight into the development of desirable characteristics, such as food grade status, high loading capacity, site targeting, and controlled release capacity. Finally, the applications of food-borne delivery systems of functional substances for precision nutrition are emphasized to meet the requirement for precision nutrition during nutritional intervention for chronic diseases.

Published
2024
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142. Estrogen enhances tumor growth and angiogenesis indirectly via mediation of bone marrow‑derived cells as well as directly through stimulation of tumor and endothelial cells

Author

Zhuo, Yingchen, primary, Li, Xueqian, additional, Zheng, Qiaowei, additional, Fan, Xingjun, additional, Ma, Wenbing, additional, Chen, Jingguo, additional, Zhao, Xue, additional, Zhao, Peipei, additional, Liu, Xuanlin, additional, Tang, Fengru, additional, Cheng, Kai, additional, and Feng, Weiyi, additional

Published
2018
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