CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bingcheng Lin,Lili Yang,Minghui Zheng,Linjun Qin,Shuting Liu,Yuxiang Sun,Changzhi Chen,Guorui Liu
Copper compounds are considered the strongest promotors of unintentional persistent organic pollutants (POPs) formation, while calcium compounds are widely used to inhibit this process. Understanding the mechanisms underlying these processes is important for synergetic control of multiple POPs. Herein, the promoting ability of CuCl 2 on the synergetic formation of POPs from anthracene and the underlying mechanisms were clarified. During thermochemical reaction with CuCl 2 , Cu 2+ was first reduced to Cu + , and finally oxidized to CuO. Furthermore, CuCl 2 promoted the formation of environmentally persistent free radicals (EPFRs) during thermochemical reaction. The formed EPFRs were identified as anthrone-type and anthraquinone-type radicals using electron paramagnetic resonance spectroscopy and gas chromatography/quadrupole time-of-flight mass spectrometry. Synergetic inhibition of POPs and EPFRs was achieved using CaO. The inhibiting mechanism of CaO was attributed to the absorption of chlorine originating from CuCl 2 through the formation of CaClOH and the inhibition of free radical intermediates for POPs formation.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Peng Deng,Fangdan Xu,Yuyang Zhou,Lili Wang
Polylactic acid (PLA) is a promising biodegradable polymer, however conventional disperse dyeing departs it from eco-friendly conception; the limited compatibility with bio-based dyes also leads to the low durability of colour and functionality. This study presents an effective strategy for fabricating durably golden yellow and UV protective PLA integrating quercetin (Qc) and formaldehyde-free crosslinker (Trimethylolpropane tris-2-methyl-1-aziridinepropionate, TTMAP). Results show that a notable increase in the K/S of PLA from 5.83 to 14.97 takes place when the TTMAP concentration escalates from 0 to 5 g/L under the help of methyl cinnamate (MC) and deep eutectic solvent(DES). Under optimal condition, the fabricated PLA displays a shining golden appearance and UV shielding property, with colour fading rate of 6% and well maintained UPF50+ rating after five cycles of washing. The mechanism study reveals that the enhanced adhesion between Qc and PLA by TTMAP is a combining effect of chemical crosslinking and physical encapsulation. In all, the method developed in this research not only pushes forward the development of next generation bio-based PLA product approaching to the targets of sustainable textile industry and global carbon neutralization, but is also transferable to the surface modification of PLA material in other fields such as medical care, functional composite, packaging.
研究领域:
材料科学
·
纺织工程
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xing Han,Xin Tang,Rifei Chen,Wei Li,Pingan Zhu,Liqiu Wang
We present a citrus-peel-like micro-cavity structure for the design of durable Slippery Liquid-Infused Porous Surfaces (SLIPSs). Owing to the re-entrant and enclosed nature of micro-cavity, lubricant oils can be stabilized by mitigating mass loss resulting from liquid displacement and shear drainage, respectively. Citrus-peel-like micro-cavity SLIPS displays two orders of magnitude enhancement in durability in the droplet-sliding test when compared with micro-pillar SLIPS and smooth lubricant surface. We demonstrated precise droplet manipulation without liquid loss and cross-contamination by harnessing the Marangoni effect with photo-thermal control. Cavity-smooth SLIPS with large adhesion contrast was patterned to initiate multiple droplet coalescences for on-demand neutralization reaction. The citrus-peel-like micro-cavity SLIPS would be beneficial to various applications, such as multi-step chemical reactions and bio-detections that require loss-free, contamination-free, and programmable droplet manipulation.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
·
2019
·
IF 1.463
Kai Chen,Mao-Xi Huang,Qing-Cai Shi,Xin Xie,Lin-Hong Jin,Wei-Ming Xu,Xiang-Yang Li
Pheromones can be used as leafhopper attractants. However, commercial pheromone products, such as the Ingle lure, have certain limitations, including poor persistence in the field. In this study, (E)-2-hexenal, (Z)-3-hexen-1-ol, (Z)-3-hexenyl acetate, (E)-ocimene, linalool, and geraniol were selected and behaviorally tested as potential leafhopper attractants. Y-tube olfactometer tests showed that the C2 formulation was more effective than other formulations. In tea field trials, the number of leafhoppers caught by sticky board traps baited with C2 lures was greater than that caught by treatment. The number of leafhoppers attracted by the C2 lures was greater than that attracted by the commercial Ingle lures. Additionally, the total amount of active C2 components on lures was greater than that of the active components on the lure after 14 days. Thus, the results indicated that the C2 formulation may attract leafhoppers and have a greater persistence than other formulations in tea field.
研究领域:
昆虫学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Huijun Su,Shaobo Shi,Ming Zhu,Jianhua Li,Guanyong Su
Liquid crystal monomers (LCMs) have been proposed to be persistent, bioaccumulative, and toxic (PBT) substances; however, there is a dearth of information regarding their occurrence in sediment samples. Here, an analytical method was developed for the quantitative determination of LCMs in sediment samples, and n = 76 sediment samples were collected and analyzed to determine accurate concentrations of LCMs. Our results indicated that the developed pretreatment procedure was applicable for the determination of LCM concentrations in sediments. We observed that LCMs were detected in 75 out of the 76 sediment samples, and 23, 18, and 14 out of the 39 target LCMs were quantified in at least one of the analyzed sediments from rivers around LCM or liquid crystal device (LCD) manufacturers, Taihu Lake, and rivers around e-waste recycling sites, respectively. The LCMs in the samples from rivers around LCM/LCD manufacturers exhibited the greatest mean concentrations of 26.1 ng/g dry weight (dw), followed by those from e-waste recycling site areas (1.15 ng/g dw) and Taihu Lake (0.076 ng/g dw). Collectively, this study provided the first analytical method that was able to quantify the concentrations of LCMs in sediment samples and provided the first evidence for the occurrence of LCMs in sediment samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Xintong Li,Hongxia Zhao,Baocheng Qu,Yu Tian
Environmentally persistent free radicals (EPFRs) generated under irradiation have been widely detected in soil particles, atmospheric particles and microplastic particles, but the formation of EPFRs in water is not well understood. This study investigated the formation of EPFRs on particulate organic matter (POM) in water contaminated by anthracene (Ant) under irradiation. The photoformation and decay progress of EPFRs was represented with the help of electron paramagnetic resonance (EPR) technique on both actual POM and Fe(III)-montmorillonite simulated samples. EPR signals at the range of 10 16 to 10 17 spin/g were detected and the half-life time of EPFRs stored in water was at around 16.62 h and 60.80 h, much shorter than those in the air. The g factors were all larger than 2.0040, which indicated the generation of oxygen centered EPFRs. The primary intermediates were identified by gas chromatography-mass spectrometer (GC-MS) and a possible EPFR formation pathway during Ant degradation was proposed. The interaction between Ant and POM, and the hydroxylation and carbonylation of the intermediates made contributions to the generation of EPFRs. Meanwhile, the indirect photodegradation of bisphenol A (BPA) has been demonstrated by analyzing the reactive oxygen species (ROS) and photogenerated electrons in the solution with POM containing EPFRs. It is found that hydroxyl radicals (•OH) and singlet oxygen ( 1 O 2 ) were induced and might promote the photodegration. Overall, our present study provided useful information to understand the photoformation of EPFRs on POM and their fate in aqueous environments.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yuhan Zhu,Jia Wei,Jun Li
The water ecosystem and public health are often threatened by Arsenic (As). The primary type of As in paddy field and ground water is As(III), which is more toxic and mobile than As(V). In this research, biochar prepared from sewage sludge (SBC) through hydrothermal technique was used to activate persulfate (PS) to oxidate As(III), making it less toxic As(V). The developed SBC/PS system could oxidate As(III) effectively in the wide pH values (2−10). Excluding the influence of specific surface area and functional groups, the concentration of environmental persistent free radicals (EPFRs) had a good linear relationship with the oxidation of As(III), reaching above 0.96. According to a mechanism analysis, EPFRs on SBC could transfer electrons to directly activate PS to produce SO 4 − ·, ·OH, O 2 − ·, and 1 O 2 to improve the oxidation of As(III). These results not only indicated that the biochar/PS system’s application scope can be successfully increased by adjusting the preparation conditions, but also revealed the invaluable role of EPFRs in As(III) oxidation process.
研究领域:
环境科学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Zhong Zhang,Yaxin Meng,Haitao Niu,Hua Zhou
Clean production of fluorine-free and colorful superhydrophobic surface coating has been highly demanded in many applications but still faces many major challenges. Herein, a one-step clean coating process has been developed to make robust fluorine-free superhydrophobic coating with outstanding color fastness and self-healing property. The coating system comprises cycloolefin copolymer polymer (COC), hexadecyltrimethoxysilane (HDTMS), hydrophobic functionalized TiO 2 nanoparticulates and dyeing pigments. Janus cotton fabrics are prepared by applying the TiO 2 -HDTMS/PB/COC composite coating solution onto the facing side of the fabric by an electrospraying technique. The coated fabric side demonstrates superhydrophobicity showing water contact angle (WCA) of 167.3° ± 2.2° and sliding angle (SA) of 6.9° ± 0.5°, while the un-coated side still retains its original hydrophilic property. The coating shows excellent color fastness and strong bonding strength that can withstand many severe treatments with little affection on color and superhydrophobicity. The coating's original superhydrophobicity can be restored from chemical or physical damages. The developed coating system have also been applied to many other substrates (e.g. polyester, wool, mesh membrane, sponge, etc.). More importantly, the process has low energy consumption with almost no waste liquid produced during the coating process. This simple yet clean coating strategy meets the requirements of green and low energy dyeing, and will benefit the development of robust multifunctional coating .
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Research
·
2024
·
IF 11.4
Li Cui,Guiyun Deng,Jianghong Wu,Fang Ding,Wenjie Wang,Haiyang Yu,Zhiyong Song,Changhui Rui,Heyou Han,Huizhu Yuan
Introduction Diaphorina citri is the most serious pest of citrus worldwide because it is the natural insect vector of huanglongbing. Cycloxaprid (Cyc) was highly toxic to D. citri . However, the poor solubility and stability had limited its development. Objectives In order to improve the insecticidal effect and stability to harsh climatic conditions of Cyc. Methods Cyc was chosen as the representative pesticide, 4,4′-methylenebis (phenyl isocyanate), PEG-600 and n-butanol were used to prepare sustained-release nano-gelation particles (Cyc@NGs). Results Cyc@NGs enhance the toxicity of Cyc more than 3 folds. Furthermore, Cyc@NGs showed excellent anti-rain and anti-UV capacity. After being exposed to ultraviolet light for 12 h, Cyc decreased by 100 %, while the insecticide content of Cyc@NGs only decreased by 25 %. Additionally, Cyc@NGs possessed better wettability on citrus leaves, mainly benefitting from its lower contact angle on citrus leaves. Moreover, FITC-labeled nano-gelation particles (FITC-NGs) exhibited high capability to penetrate and enrich in citrus leaf tissue and D. citri midgut. Consequently, NGs promoted the translocation and durability of insecticides, thereby, increasing the insecticidal activity. The results suggested that nano-gelation particle is a promising platform to deliver insecticides and Cyc@NGs would be the suitable candidate for the effective management of D. citri .
研究领域:
植物保护
·
农药科学
·
昆虫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD SCIENCE AND BIOTECHNOLOGY
·
2019
·Vol. 28
·期 5
·1349-1358
·
IF 0.888
Lin Jie,Shi Yuanxu,Dong Chunwang,Wang Xiaochang
The perceived aroma of oolong tea is primarily and directly affected by its infusion matrix, and the release persistence of headspace volatiles can better illustrate the persistent aroma. Headspace solid phase microextraction coupled with gas chromatography–mass spectrometry was performed to analyze the headspace constituents of oolong tea. The presence of the infusion matrix seemed to prevent the headspace release of certain odorants. The release of indole, nerolidol, and α -farnesene was also remarkably enhanced or depressed (2.70, 1.56, and 0.69-fold in tea infusion versus in dry leaves). Moreover, the amount of volatile species gradually decreased with increased water ratio. Eight odorants were determined to be stable and persistent during continuous infusion, whereas six were determined to be less persistent (gradually decreased or stopped releasing). The volatile dilution test further confirmed the persistent release of nerolidol.
研究领域:
食品科学
·
植物化学
✓ 已验证
DOI
PubMed
高影响因子
Toxics
·
2024
·Vol. 12
·期 11
·796
·
IF 3.9
Xintong Li,Baocheng Qu,Jingyao Wang,Hongxia Zhao
Environmentally persistent free radicals (EPFRs) generated on particles under irradiation in water have attracted particular attention, and their formation mechanisms are not well understood. This study investigated the photoformation of EPFRs on both actual samples collected from an oil production plant in Panjin, Liaoning, China, and simulated Fe(III)-montmorillonite samples in water. The EPFRs detected on actual samples were not easily generated compared with those in the soil or in the air, based on the concentrations of identified PAHs. EPR signals in the range of 1017to 1018spin/g were detected on the simulated Fe(III)-montmorillonite samples. Their g factors were smaller than 2.0030, which indicated the generation of carbon-centered EPFRs. The primary byproducts were identified by chromatography–mass spectrometry (GC-MS), and a possible EPFR formation pathway during PAH degradation was proposed. Hydrogenation of PAHs during the photoformation of EPFRs was observed and might be due to the catalysis of the simulated particles and the interaction of the intermediates. Meanwhile, the effects of the typical anions (NO2−and Cl−) and the surfactant (TWEEN®80 and sodium dodecyl sulfate) were investigated and indicated that the phototransformation process and adsorption process would affect the formation of EPFRs. Overall, our study provided useful information to understand the photoformation of EPFRs in aqueous environments.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Qian Liu,Jianbing Cui,Tatsuo Kaneko,Weifu Dong,Mingqing Chen,Jing Luo,Dongjian Shi
The inevitable presence of fog causes a loss of light transmission in optical materials and leads to many unacceptable and serious consequences. A promising strategy for avoiding fog is to modulate the wettability of the material surface and further change the formed way of droplets. Although many works achieved high antifogging coatings, they are lack of the long-lasting antifogging at varied conditions. In this work, a high adhesion strength and persistent antifogging capability hydrophilic coating is obtained by utilizing silane coupling agents containing double bonds such as triethoxyvinylsilane (A151) and 3-(trimethoxysilyl)propyl methacrylate (KH570) with 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and then compositing with poly(vinyl alcohol) (PVA). The coating composed of A151 has a relatively uniform and flat surface structure, due to weaker hydrolysis ability of A151 promoted the smooth condensation speed, compared to KH570. Thanks to the hydrophilic and hydrophobic balance properties of the A151-modulated coating network, the resultant coating exhibits good antifogging performance in the range of 0 °C to 90 °C, which keeps a light transmission of about 85 %. Surprisingly, the coating shows excellent adhesion (350–700 kPa) to the substrate, which is significantly better than other conventional hydrophilic antifogging coatings, and the hydrophilic and hydrophobic modulation capability and the enhanced interfacial adhesion of A151 segments provide the basis of the coating for long-lasting antifogging, which would open up a new way of durable hydrophilic antifogging coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）