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Article ; Online: Joule Heating of Carbon-Based Materials Obtained by Carbonization of Para -Aramid Fabrics

Daniel Karthik / Jiri Militky / Yuanfeng Wang / Mohanapriya Venkataraman

C, Vol 9, Iss 23, p

2023 Volume 23

Abstract: The Joule heating behavior of carbon-based materials obtained by the process of carbonization of industrial para-aramid fabric wastes are investigated in the present work. Carbonization involves a process of thermally decomposing organic material, ... ...

Abstract	The Joule heating behavior of carbon-based materials obtained by the process of carbonization of industrial para-aramid fabric wastes are investigated in the present work. Carbonization involves a process of thermally decomposing organic material, thereby altering its physical and chemical properties to obtain carbon-rich materials that are electrically conductive and display Joule heating behavior. The principle of Joule heating is based on the intrinsic electrical resistance of the material across an applied voltage. Here, para-aramid woven fabric wastes are converted into activated carbon materials through straightforward, controlled, single-step thermal treatments by three different kinds of atmosphere, i.e., in the CO 2 evolved from charcoal, a mixture of gases from ammonium bicarbonate salt (NH 4 HCO 3 ), and Nitrogen gas (N 2 ), respectively, inside a high-temperature furnace. The carbonization temperatures were varied from 800 to 1100 °C. The carbonization process variables were optimized to obtain carbon-rich materials with lower electrical resistivity. The results of electrical resistivity measurements show that for all three methods, the electrical resistivity decreases with increasing carbonization temperatures. An experimental setup consisting of an infrared (IR) camera, positioned over the surface of the fabric specimen to record the surface temperature of the material connected to a DC power supply, was employed. The kinetics of Joule heating and subsequent cooling were also analyzed at a fixed voltage of 5 V by recording the changes in surface temperature with respect to time. The heating–cooling cycle is described by a simple kinetic model of first order.
Keywords	Joule heating ; carbonization ; activated carbon ; electrical resistivity ; para-aramid wastes ; Organic chemistry ; QD241-441
Subject code	620
Language	English
Publishing date	2023-02-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Broadband solar‐driven water evaporator based on organic hybrid bandgap and bio‐mimetic interfaces

Jingshuai Zhu / Xiang Wang / Jiechang Liang / Xiaopan Qiu / Shiguo Chen / Yu Wang / Yuanfeng Wang

EcoMat, Vol 5, Iss 4, Pp n/a-n/a (2023)

2023

Abstract: Abstract Owing to the lightweight, flexibility, and molecular diversity, organic photothermal materials are considered promising solar absorbent materials for water‐evaporating purification. Herein, we utilize the blend of two organic conjugated ... ...

Abstract	Abstract Owing to the lightweight, flexibility, and molecular diversity, organic photothermal materials are considered promising solar absorbent materials for water‐evaporating purification. Herein, we utilize the blend of two organic conjugated photothermal materials, PM6 and Y6, with broadband solar absorption from 350 to 1000 nm and high‐efficiency photothermal properties to fabricate a Janus water evaporator on cellulose paper. Similar to the asymmetric wetting behavior on the lotus leaf, the evaporator shows efficient water adhesion on the bottom surface and water repellency on the top surface for a desirable self‐floating capability and salt resistance. With a mass of only 0.5 mg per 3.14 cm2, the PM6:Y6 blend‐based water evaporator achieves 88.9% of solar thermal conversion efficiency (η) and 1.52 kg m−2 h−1 of solar water evaporation rate (m) under 1.0 kW m−2 solar irradiation. These properties are almost the best performance among purely organic water evaporators especially with such a premise of material saving. The concentrations of primary ions are significantly decreased by 4–6 orders after desalination, accompanied by excellent performance for wastewater treatment. This evaporator realizes a m of 1.21 kg m−2 h−1, a η of 75.7%, and a voltage of 61 mV under one sun irradiation by assembling with a thermoelectric equipment. This study demonstrates that the blending of PM6 and Y6 achieves photothermal synergism, which improves the photothermal property and water evaporation rate, providing a valuable prospect for their application in water purification and thermoelectric power generation.
Keywords	lotus leaf bionic ; organic photothermal materials ; self‐floating ; solar desalination ; solar interfacial evaporation ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Subject code	660
Language	English
Publishing date	2023-04-01T00:00:00Z
Publisher	Wiley
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Immunosensor of Nitrofuran Antibiotics and Their Metabolites in Animal-Derived Foods

Jingze Jia / Hongxia Zhang / Jiayi Qu / Yuanfeng Wang / Naifeng Xu

Frontiers in Chemistry, Vol

A Review

2022 Volume 10

Abstract: Nitrofuran antibiotics have been widely used in the prevention and treatment of animal diseases due to the bactericidal effect. However, the residual and accumulation of their metabolites in vivo can pose serious health hazards to both humans and animals. ...

Abstract	Nitrofuran antibiotics have been widely used in the prevention and treatment of animal diseases due to the bactericidal effect. However, the residual and accumulation of their metabolites in vivo can pose serious health hazards to both humans and animals. Although their usage in feeding and process of food-derived animals have been banned in many countries, their metabolic residues are still frequently detected in materials and products of animal-derived food. Many sensitive and effective detection methods have been developed to deal with the problem. In this work, we summarized various immunological methods for the detection of four nitrofuran metabolites based on different types of detection principles and signal molecules. Furthermore, the development trend of detection technology in animal-derived food is prospected.
Keywords	immunosensor ; antibody ; animal-derived foods ; nitrofuran ; antibiotics ; Chemistry ; QD1-999
Subject code	630
Language	English
Publishing date	2022-06-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Effect of Bond-Slip on Dynamic Response of FRP-Confined RC Columns with Non-Linear Damping

Kun Guo / Qirui Guo / Yuanfeng Wang

Applied Sciences, Vol 11, Iss 5, p

2021 Volume 2124

Abstract: As a composite material, the damping energy consumption mechanism of fiber reinforced polymer-confined reinforced concrete (FRP-C RC) structure is very complex. In previous dynamic calculation models, the bond-slip effect for steel bars was often ignored, ...

Abstract	As a composite material, the damping energy consumption mechanism of fiber reinforced polymer-confined reinforced concrete (FRP-C RC) structure is very complex. In previous dynamic calculation models, the bond-slip effect for steel bars was often ignored, which would lead to a considerable error in the response of the FRP-C RC structures. In this paper, a new numerical model of FRP-C RC columns considering the bond-slip for steel bars is established using a zero-length element and nonlinear beam-column elements in the OpenSees software, and the results of the model are verified by experimental results. Based on the complex damping theory, the loss factor expression and nonlinear damping model of FRP-C RC columns with the bond slip effect are proposed. Finally, the dynamic response of FRP-C RC columns with nonlinear damping under harmonic load is calculated and compared with the results available in literature. The results show that the proposed model considering steel bars’ bond-slip can provide better prediction for dynamic response of FRP-C RC columns and make the future seismic design of FRP-C RC columns safer.
Keywords	FRP-C RC columns ; bond-slip ; zero-length element ; nonlinear damping ; dynamic response ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	621
Language	English
Publishing date	2021-02-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Proposition on improving environmental forensic system in China

Huilei Wang / Yuanfeng Wang

Journal of Forensic Science and Medicine, Vol 3, Iss 4, Pp 229-

2017 Volume 236

Abstract: In the early period of China, economy developed rapidly at the cost of environment. Recently, it is generally recognized that the heavily polluted environment not only puts a brake on economic development but also paces negative impact on people' health ... ...

Abstract	In the early period of China, economy developed rapidly at the cost of environment. Recently, it is generally recognized that the heavily polluted environment not only puts a brake on economic development but also paces negative impact on people' health as well as probably next decades of generations. Accordingly, the latest Environmental Protection Law revised in 2014 makes a clear-cut division of environmental responsibility and regulates stricter penalties of breaching law. As the new environmental law is enforced gradually, environmental forensic is increasingly required in the process of ascertaining facts in judicial proceedings of environmental cases. Based on the outcomes of documentary analysis for all environmental cases judged on the basis of new environmental law, it is concluded that there still exists problems in the present system of environmental forensic. Thus, this paper is aimed to make proposition on improving Chinese environmental forensic system, which involves: (i) promoting capability of EFS to handle professional questions; (ii) develop price mechanism; (iii) multidepartments cooperate to establish unifying and complete EFS system; and(iv) enhance the probative value of results of EFS. Such protocol for amending present regulation on environmental forensic is of significant importance because a quality report of environmental forensic will contribute to provide strong probative evidence of culprits' activity of releasing contaminant into environment, degree of damages for victims, and above all, causality between the behavior of public nuisance and damages.
Keywords	China ; environmental cases ; environmental forensic system ; proposition ; Public aspects of medicine ; RA1-1270
Subject code	333
Language	English
Publishing date	2017-01-01T00:00:00Z
Publisher	Wolters Kluwer Medknow Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: The rational thinking of expert opinion and communicating in courtroom

Bing Li / Yuanfeng Wang

Journal of Forensic Science and Medicine, Vol 3, Iss 2, Pp 82-

2017 Volume 84

Abstract: Since the past half century, expert testimony has played an increasingly important role in Chinese litigation. As the amount of expert testimony has grown, the issues about its admissibility and scientific foundation related to evidence are becoming to ... ...

Abstract	Since the past half century, expert testimony has played an increasingly important role in Chinese litigation. As the amount of expert testimony has grown, the issues about its admissibility and scientific foundation related to evidence are becoming to be questioned commonly. Since eighteenth central committee (China) adopted the decision of the Central Committee of China on several important issues in promoting the legal system, the evidence was redefined to become the predominance in the whole proceeding. This article reviews the expert knowledge implicit in the opinions. It argues that the expert opinions ask judges to be aware of the role of communicationg between participants. Expert opinion is not only gained from laboratory, but also socially constructed in the rational expression and communication, which requir us think logically in terms of legal perceptions of science and expert knowledge in the empirical world.
Keywords	Bayesian approach ; conclusion scale ; expert opinion ; forensic evidence ; Public aspects of medicine ; RA1-1270
Language	English
Publishing date	2017-01-01T00:00:00Z
Publisher	Wolters Kluwer Medknow Publications
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Degradable Self-Destructive Redox-Responsive System Based on Mesoporous Organosilica Nano-Vehicles for Smart Delivery of Fungicide

You Liang / Sijin Wang / Yijia Yao / Siwen Yu / Ao Li / Yuanfeng Wang / Jiehui Song / Zhongyang Huo

Nanomaterials, Vol 12, Iss 4249, p

2022 Volume 4249

Abstract: The development of stimuli-responsive controlled release formulations is a potential method of improving pesticide utilization efficiency and alleviating current pesticide-related environmental pollution. In this study, a self-destruction redox- ... ...

Abstract	The development of stimuli-responsive controlled release formulations is a potential method of improving pesticide utilization efficiency and alleviating current pesticide-related environmental pollution. In this study, a self-destruction redox-responsive pesticide delivery system using biodegradable disulfide-bond-bridged mesoporous organosilica (DMON) nanoparticles as the porous carriers and coordination complexes of gallic acid (GA) and Fe(III) ions as the capping agents were established for controlling prochloraz (PRO) release. The GA–Fe(III) complexes deposited onto the surface of DMON nanoparticles could effectively improve the light stability of prochloraz. Due to the decomposition of GA–Fe(III) complexes, the nano-vehicles had excellent redox-responsive performance under the reducing environments generated by the fungus. The spreadability of PRO@DMON–GA–Fe(III) nanoparticles on the rice leaves was increased due to the hydrogen bonds between GA and rice leaves. Compared with prochloraz emulsifiable concentrate, PRO@DMON–GA–Fe(III) nanoparticles showed better fungicidal activity against Magnaporthe oryzae with a longer duration under the same concentration of prochloraz. More importantly, DMON–GA–Fe(III) nanocarriers did not observe obvious toxicity to the growth of rice seedlings. Considering non-toxic organic solvents and excellent antifungal activity, redox-responsive pesticide controlled release systems with self-destruction properties have great application prospects in the field of plant disease management.
Keywords	mesoporous organosilica ; gallic-acid–Fe(III) complexes ; prochloraz ; redox-responsive ; self-destructive ; Magnaporthe oryzae ; Chemistry ; QD1-999
Subject code	500 ; 540
Language	English
Publishing date	2022-11-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Ketones in Low-Temperature Oxidation Products of Crude Oil

Shuai Ma / Yunyun Li / Rigu Su / Jianxun Wu / Lingyuan Xie / Junshi Tang / Xusheng Wang / Jingjun Pan / Yuanfeng Wang / Quan Shi / Guangzhi Liao / Chunming Xu

Processes, Vol 11, Iss 1664, p

2023 Volume 1664

Abstract: Ketone compounds are oxidation products of crude oil in the in-situ combustion (ISC) process. Revealing the molecular composition of ketones can provide theoretical guidance for understanding the oxidation process of crude oil and valuable clues for ... ...

Abstract	Ketone compounds are oxidation products of crude oil in the in-situ combustion (ISC) process. Revealing the molecular composition of ketones can provide theoretical guidance for understanding the oxidation process of crude oil and valuable clues for studying the combustion state of crude oil in the reservoir. In this study, low-temperature oxidation (LTO) processes were simulated in thermal oxidation experiments to obtain thermally oxidized oil at different temperatures (170 °C, 220 °C, 270 °C, and 320 °C). A combination of chemical derivatization and positive-ion electrospray (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) was used to analyze the molecular composition of different kinds of ketones (fatty ketones, naphthenic ketones, and aromatic ketones) in the oxidized oils at different temperatures. The results showed that the concentration of aliphatic ketones and aliphatic cyclic ketones in the product oils decreased with the increase in temperature, while aromatic ketones increased with the increase in temperature. At the same oxidation temperature, the content of ketones follows this order: fatty ketones < cycloalkanes < aromatic ketones. The concentrations of ketones reached their maximum value at 170 °C and decreased at high temperatures due to over-oxidation. It was also found that nitrogen-containing compounds are more easily oxidized to ketone compounds than their hydrocarbon counterparts in the LTO process.
Keywords	in-situ combustion ; low-temperature oxidization ; ketone ; crude oil ; FT-ICR MS ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
Subject code	660 ; 540
Language	English
Publishing date	2023-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Preparation, structural characterization and bioactivities of Se-containing polysaccharide: A review

Cheng, Lizeng / Yuanfeng Wang / Xiangxiang He / Xinlin Wei

International journal of biological macromolecules. 2018 Dec., v. 120

2018

Abstract: Se-containing polysaccharide is known to Se-conjugated macromolecule, with potent bioactivities due to the synergistic effects of Se and native polysaccharide. It is not only explored as a novel Se source in dietary supplement, but also as the superb ... ...

Abstract	Se-containing polysaccharide is known to Se-conjugated macromolecule, with potent bioactivities due to the synergistic effects of Se and native polysaccharide. It is not only explored as a novel Se source in dietary supplement, but also as the superb bioactive component owning various functions, including antioxidant, antitumor, immune-enhancement, hepatoprotective, antidiabetic, anti-inflammatory and neuroprotective activities. Se-containing polysaccharide can exert the efficacy of Se and polysaccharide, and its activities are much higher than those of Se or polysaccharide. In the last decades, numerous reports on Se-containing polysaccharide (including natural Se-containing polysaccharide and selenylated polysaccharide) appeared in literature. For the first time, this article systematically introduces recent advances on preparation, structural characterization and bioactivities of Se-containing polysaccharide in details, and discusses its future prospects and the weaknesses in the current study.
Keywords	antioxidants ; bioactive compounds ; dietary supplements ; neuroprotective effect ; polysaccharides ; synergism
Language	English
Dates of publication	2018-12
Size	p. 82-92.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2018.07.106
Database	NAL-Catalogue (AGRICOLA)

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Article: Environmental impacts of short building lifespans in China considering time value

Wang, Jingjing / Yuanfeng Wang / Yurong Zhang

Journal of cleaner production. 2018 Dec. 01, v. 203

2018

Abstract: China has about 60 billion m2 of existing buildings, with approximately 2 billion m2 newly constructed each year. This accounts for half of all new buildings globally. A large number of buildings were demolished during the urban renewal process in China, ...

Abstract	China has about 60 billion m2 of existing buildings, with approximately 2 billion m2 newly constructed each year. This accounts for half of all new buildings globally. A large number of buildings were demolished during the urban renewal process in China, significantly reducing the average lifespan of buildings and wasting vast amounts of energy and resources. However, the corresponding environmental impacts of reduced building lifespans have not been studied. Moreover, how to accurately evaluate future environmental impacts of construction projects is still a difficult problem, since in some cases the environmental impacts may not be realized for many years. In order to investigate the relationship between building lifespans and the corresponding environmental impacts, this paper first estimated the average lifespan of buildings in China through literature review, field investigation and calculation (using survival rate and demolition rate, respectively), revealing that the average building lifespan in China is from 25 to 35 years which is far shorter than the designed lifespans of buildings in China. It is also much shorter compared to the building lifespans in ten developed countries. Six buildings in Hebei Province in China were selected as case studies to conduct life cycle environmental (LCE) impact assessment. The results of the case studies indicate that (1) extending the building's lifespan from 30 to 50 years would reduce 40% of its total LCE impacts; (2) the environmental impacts caused by buildings (per area per year) in China is 2.3 times than that in the UK; (3) when environmental impacts are considered over time, they would decrease dramatically with the increase of discount rate, indicating that the buildings in developed cities in China with higher discount rates are more sensitive to environmental degradation.
Keywords	buildings ; case studies ; cities ; developed countries ; discount rate ; energy ; environmental degradation ; environmental impact ; China ; United Kingdom
Language	English
Dates of publication	2018-1201
Size	p. 696-707.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2018.08.314
Database	NAL-Catalogue (AGRICOLA)

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