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Pd nano-catalyst supported on biowaste-derived porous nanofibrous carbon microspheres for efficient catalysis

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化学科学与工程前沿:英文版 2023年第9期17卷 1289-1300页

作者： Xianglin Pei Siyu Long Lingyu Zhang Zhuoyue Liu Wei Gong Aiwen Lei dongdong ye School of Materials and Architectural Engineering Guizhou Normal UniversityGuiyang550025China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan430072China School of Textile Materials and Engineering Wuyi UniversityJiangmen529020China Guizhou Key Laboratory of Inorganic Nonmetallic Functional Materials Guizhou Normal UniversityGuiyang550025China

Environmental pollution caused by the presence of aromatic aldehydes and dyes in wastewater is a serious global concern. An effective strategy for the removal of these pollutants is their catalytic conversion, possibly to valuable compounds. Therefore, the design of efficient, stable and long-lifetime catalysts is a worthwhile research goal. Herein, we used nanofibrous carbon microspheres (NCM) derived from the carbohydrate chitin present in seafood waste, and characterized by interconnected nanofibrous networks and N/O-containing groups, as carriers for the manufacture of a highly dispersed, efficient and stable Pd nano-catalyst (mean diameter ca. 2.52 nm). Importantly, the carbonised chitin’s graphitized structure, defect presence and large surface area could promote the transport of electrons between NCM and Pd, thereby endowing NCM supported Pd catalyst with high catalytic activity. The NCM supported Pd catalyst was employed in the degradation of some representative dyes and the chemoselective hydrogenation of aromatic aldehydes;this species exhibited excellent catalytic activity and stability, as well as applicability to a broad range of aromatic aldehydes, suggesting its potential use in green industrial catalysis.

关键词： biowaste chitin nanofibrous palladium nano-catalyst catalysis

Raman imaging-assisted customizable assembly of MOFs on cellulose aerogel

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Nano Research 2022年第3期15卷 2599-2607页

作者： Zhanhong Yuan Dingding Meng Yingzhu Wu Guangqing Tang Ping Liang John HXin dongdong ye School of Textile Materials and Engineering Wuyi UniversityJiangmen 529020China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China Institute of Textiles&Clothing The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Because of a weak interface-bonding force between metal–organic frameworks(MOFs)and substrates and the loss of customization in structural designs owing to the lack of the regulation of ion sites,MOFs tend to escape from the constructed composite template.In this study,the as-prepared 2,2,6,6-tetramethylpiperidyl-1-oxyl(TEMPO)-oxidized algae cellulose nanofibers(TACFs)were used to chelate metal ions at controllable sites and subsequently firmly entangle the assembled MOF crystals.The distribution of ions and synthesized MOFs inside the gel was monitored using Raman imaging technology,which provided an intuitive approach for visually observing the ions and MOF distribution.Using this technology,the synthesized customizable TACFs@ZIF-67 aerogels exhibited a high specific surface area(734.7 m^(2)/g),low density(6.18 mg/cm^(3)),controlled particle distribution,good underwater structural stability,and excellent adsorption of dyes.This study provides a way for solving the dispersion problem of MOFs in nanofibrous aerogels using Raman imaging technology–assisted microcosmic fixed-point design.

关键词： cellulose nanofiber aerogel Raman imaging ion distribution metal–organic framework

3D-printed mechanically strong and extreme environment adaptable boron nitride/cellulose nanofluidic macrofibers

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Nano Research 2023年第5期16卷 7609-7617页

作者： Le Yu Tingting Gao Ruiyu Mi Jing Huang Weiqing Kong Dapeng Liu Zhiqiang Liang dongdong ye Chaoji Chen School of Resource and Environmental Sciences Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key LaboratoryWuhan UniversityWuhan 430079China Key Laboratory of Textile Science and Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Interdisciplinary Materials Research Center School of Materials Science and EngineeringTongji UniversityShanghai 201804China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China School of Textile Materials and Engineering Wuyi UniversityJiangmen 529020China

Fibrous nanofluidic materials are ideal building blocks for implantable electrode,biomimetic actuator,wearable electronics due to their favorable features of intrinsic flexibility and unidirectional ion transport.However,the large-scale preparation of fibrous nanofluidic materials with desirable mechanical strength and good environment adaptability for practical use remains challenging.Herein,by fully taking advantage of the attractive mechanical,structural,chemical features of boron nitride(BN)nanosheet and nanofibrillated cellulose(NFC),a scalable and cost-effective three-dimensional(3D)printed macrofiber featuring abundant vertically aligned nanofluidic channels is demonstrated to exhibit a good combination of high tensile strength of 100 MPa,thermal stability of up to 230℃,ionic conductivity of 1.8×10^(−4)S/cm at low salt concentrations(<10^(−3)M).In addition,the versatile surface chemistry of cellulose allows us to stabilize the macrofiber at the molecular level via a facile postcross-linking method,which eventually enables the stable operation of the modified macrofiber in various extreme environments such as strong acidic,strong alkaline,high temperature.We believe this work implies a promising guideline for designing and manufacturing fibrous nanodevices towards extreme environment operations.

关键词： three-dimensional(3D)printing nanofluidic boron nitride cellulose macrofiber

Securing Parked Vehicle Assisted Fog Computing With Blockchain and Optimal Smart Contract Design

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 426-441页

作者： Xumin Huang dongdong ye Rong Yu Lei Shu School of Automation Guangdong University of TechnologyGuangzhou 510006 Guangdong Key Laboratory of IoT Information Technology Guangdong University of TechnologyGuangzhou 510006China Guangdong-Hong Kong-Macao Joint Laboratory for Smart Discrete Manufacturing Guangzhou 510006China College of Engineering Nanjing Agricultural UniversityNanjing 210095China School of Engineering University of LincolnLincoln LN67TSUK

Vehicular fog computing(VFC)has been envisioned as an important application of fog computing in vehicular networks.Parked vehicles with embedded computation resources could be exploited as a supplement for VFC.They cooperate with fog servers to process offloading requests at the vehicular network edge,leading to a new paradigm called parked vehicle assisted fog computing(PVFC).However,each coin has two sides.There is a follow-up challenging issue in the distributed and trustless computing environment.The centralized computation offloading without tamper-proof audit causes security threats.It could not guard against false-reporting,free-riding behaviors,spoofing attacks and repudiation attacks.Thus,we leverage the blockchain technology to achieve decentralized PVFC.Request posting,workload undertaking,task evaluation and reward assignment are organized and validated automatically through smart contract executions.Network activities in computation offloading become transparent,verifiable and traceable to eliminate security risks.To this end,we introduce network entities and design interactive smart contract operations across them.The optimal smart contract design problem is formulated and solved within the Stackelberg game framework to minimize the total payments for users.Security analysis and extensive numerical results are provided to demonstrate that our scheme has high security and efficiency guarantee.

关键词： Blockchain parked vehicle smart contract Stackelberg game vehicular fog computing(VFC)

Quaternized chitosan-assisted in situ synthesized CuS/cellulose nanofibers conductive paper for flexible electrode

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Nano Research 2021年第7期14卷 2390-2397页

作者： Xiujie Huang Bichong Luo Chuanfu Liu Linxin Zhong dongdong ye Xiaoying Wang State Key Laboratory of Pulp and Paper Engineering South China University of Technology381 Wushan RoadGuangzhou 510640China School of Textile Materials and Engineering Wuyi UniversityJiangmen 529020China

Cellulose nanofibers(CNF)are considered to be a potential substrate of energy material for energy storage devices due to the foldable,lightweight,recyclable and environmentally friendly feature.However,the energy materials tend to distribute unevenly or fall off from CNF easily,resulting in the decrease of the devices’overall performance.Here,for the first time,we used quaternized chitosan(QCS)as stabilizer and adhesive to in situ synthesize and deposite copper sulfide nanocrystals(CuS-NCs)on CNF and further obtained the conductive paper for flexible supercapacitors.In the presence of QCS,CuS-NCs deposited in situ on CNF can be capped and stabilized by the QCS molecular chains for uniform distribution,which is conducive to the capacitive behavior and electrochemical stability of composite paper.The result shows that the specific capacitance of the composite paper was as high as 314.3 F/g at a current density of 1 A/g,a high rate capacitance of 252.6 F/g was achieved even at a high current density of 10 A/g.It reveals that the composite paper exhibited better electrochemical performance than many other CuS-based electrode materials for supercapacitor.More importantly,the composite paper performed well in various folding state without changing much electrochemical performance.Therefore,this work provides a novel strategy to in situ fabricate paper-based electrode for nextgeneration flexible energy-storage system.

关键词： copper sulfide nanocrystals cellulose nanofiber quaternized chitosan supercapacitors flexible devices

电力通信网运行质量评价指标体系构建及评价方法研究

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科学技术创新 2024年第3期 206-209页

作者：叶东东郭焕国网西藏电力有限公司拉萨公司西藏拉萨国网西藏电力有限公司信息通信公司西藏拉萨

电力通信网作为电力系统的重要组成部分,支撑着电力系统稳定运行,是专门服务于电力系统的通信网络。本文结合电力通信网运行过程,从线路、设备、运维以及业务四个方面分析影响电力通信网运行质量的因素,构建指标构建评价指标体系并进行... 详细信息

电力通信网作为电力系统的重要组成部分,支撑着电力系统稳定运行,是专门服务于电力系统的通信网络。本文结合电力通信网运行过程,从线路、设备、运维以及业务四个方面分析影响电力通信网运行质量的因素,构建指标构建评价指标体系并进行评价,为电力通信网运维提供参考依据。

关键词：电力通信网评价指标体系层次分析法

Microstructured capacitive sensor with broad detection range and long-term stability for human activity detection

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npj Flexible Electronics 2021年第1期5卷 141-149页

作者： Xin He Zhihao Liu Gengzhe Shen Xiang He Jionghong Liang Yu Zhong Tianlong Liang Jie He Yue Xin Chi Zhang dongdong ye Guofa Cai School of Applied Physics and Materials Wuyi UniversityJiangmenPeople’s Republic of China Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-efficiency Display and Lighting TechnologySchool of Materials and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifengPeople’s Republic of China School of Materials and Energy Guangdong University of TechnologyGuangzhouPeople’s Republic of China School of Textile Materials and Engineering Wuyi UniversityJiangmenPeople’s Republic of China

In recent years,flexible stress sensors capable of monitoring diverse body movements and physiological signals have been attracting great attention in the fields of healthcare systems,human–machine interfaces,and wearable electronics.Inspired by the structure of natural eggshell inner membrane(ESIM),we developed a pressure sensor based on MXene(Ti_(3)C_(2)T_(x))/Ag NWs(silver nanowires)composite electrodes and the micro-structured dielectric layer to meet the application requirements of wide detection range and long-term stability for the sensors.In the light of the nanoscale-microarray of the dielectric layer and the rough surface of electrode materials,this pressure sensor is expected to allow great and persistent deformation during the loading process.As a result,the device is characterized by an improved sensitivity,fast response(in the millisecond range),wide detection range(0–600 kPa),and long-term stability.The outstanding performance of the proposed sensor makes it possible to detect various human activities,such as speaking,air blowing,clenching,walking,finger/knee/elbow bending,and striking,demonstrating its good application prospects in wearable and flexible electronic devices.

关键词： stability wear Microstructure

新疆生产建设兵团畜牧业高质量发展规划资源环境承载力研究

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养殖与饲料 2024年第2期23卷 25-33页

作者：郜兴亮刘福元孙新文杨勇沙磊刘根俊叶冬冬杨井泉新疆农垦科学院畜牧兽医研究所新疆石河子832000 石河子大学动物科技学院新疆石河子832000 新疆生产建设兵团农业农村局乌鲁木齐830000

[目的]为科学制定新疆生产建设兵团(以下简称兵团)“十四五”畜牧业发展规划提供基本生产参数。[方法]以兵团及13个师2025年畜禽计划存出栏数为依据,从畜禽养殖饲草料资源承载力、水资源承载力、粪污土地承载力3个环境制约因素来分析兵... 详细信息

[目的]为科学制定新疆生产建设兵团(以下简称兵团)“十四五”畜牧业发展规划提供基本生产参数。[方法]以兵团及13个师2025年畜禽计划存出栏数为依据,从畜禽养殖饲草料资源承载力、水资源承载力、粪污土地承载力3个环境制约因素来分析兵团及各师未来畜牧业发展资源环境承载力。[结果]到2025年,兵团苜蓿缺口19.29万t,需种植21.43万hm^(2);玉米青贮缺口687.07万t,需种植11.452万hm^(2);秸秆等主要粗饲料原料盈余169.63万t;玉米籽实缺口为337.04万t,需种植42.80万hm^(2);棉粕盈余60.99万t。兵团2025年畜禽饮用水需要量增长39.63%,达563.41万t,其中第十二师增长率最大(294.94%),第八师增长量最大(88.52万t)。兵团整体畜禽粪污土地承载力不超载,达到2025年计划养殖量后仍可增加3053万个猪当量,土地消纳粪污的潜力仍很大,但第十二师以氮测算承载力指数为4.90>1,以磷测算承载力指数为3.26>1,属于严重超载,需要进行调整。[结论]“十四五”兵团及13个师的畜禽养殖数量设定与环境资源禀赋比较符合,但个别师仍需调整。

关键词：饲草料供给畜禽饮水供给畜禽粪污土地承载力畜牧业环境资源畜牧业发展规划

A Novel Optimization Algorithm for Thermal Design of MCMs

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A Novel Optimization Algorithm for Thermal Design of MCMs