Scientific Reports
·
2021
·Vol. 11
·期 1
·1-10
·
IF 4.38
Zhang Xiaofang,Wang Liuyang,Liu Chunqin,Liu Yongqiang,Mei Xiangdong,Wang Zhongyue,Zhang Tao
The white-spotted flower chafer (WSFC), Protaetia brevit arsis Lewis, is native to East Asia. Although their larvae are considered a potential resource insect for degrading plant residues, producing protein fodder, and processing to traditional medicine, adult WSFCs inflict damage to dozens of fruit and economic crops. The control of the WSFC still relies heavily on pesticides and the inefficient manual extraction of adults. Here, we report the identification and evaluation of the aggregation pheromone of WSFCs. From the headspace volatiles emitted from WSFC adults, anisole, 4-methylanisole, 2-heptanone and 2-nonanone were identified as WSFC-specific components. However, only anisole and 4-methylanisole elicited positive dose–response relationship in electroantennography tests, and only 4-methylanisole significantly attracted WSFCs of both sexes in olfactometer bioassays and field experiments. These results concluded that 4-methylanisole is the aggregation pheromone of WSFCs. Furthermore, we developed polyethylene vials as long-term dispensers of 4-methylanisole to attract and kill WSFCs. The polyethylene vial lures could effectively attracted WSFCs for more than four weeks. Pheromone-based lures can be developed as an environmentally friendly protocol for monitoring and controlling WSFC adults.
研究领域:
昆虫学
·
农业害虫防治
·
化学生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Guoxun Ben,Dong Guo,Yubing Liu,Zhigang Tang,Lanyi Sun,Jie Kong,Tianzhong Wu,Zhengang Guo,Gang Zhao,Wei Wang,Hongwei Li
Benzyl methyl ether (BME) was developed as an extractant for separating dimethyl carbonate (DMC) from methanol (ME). The study evaluated the performance of extractive distillation columns (EDWC) with single and two walls through experiments and simulations. The two-wall EDWC demonstrated superior separation efficiency, achieving ME and DMC purities above 99.9% under optimal conditions: solvent-to-feed ratio of 8, 45 theoretical stages, atmospheric pressure, extraction section/azeotropic separation section sideline at the 34th plate, azeotropic separation/DMC purification section sideline at the 20th plate, 12 theoretical stages in the common rectification section, and vapor split ratios of 0.42 (extraction section/azeotropic separation section) and 0.27 (azeotropic separation/DMC purification section). Experimental results aligned well with the simulations. The EDWC with two walls, which integrates the extraction section, azeotropic separation section, and DMC purification section with shared reboiler heating, offers significant potential to replace current DMC/ME separation processes and reduce production costs.
研究领域:
化学工程
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2020
·
IF 4.872
Huanhuan Zhu,Ruibao Jia,Shaohua Sun,Guixue Feng,Mingquan Wang,Li Sun,Lian Hou
Taste and odor (T&O) problem in water is one of the main obstacles to improve the quality of drinking water, and efficient water treatment processes are urgently needed to control T&O compounds. Ultraviolet-mediated peroxymonosulfate (UV/PMS) diminution of trichloroanisole (TCA) in water was investigated in this paper. The treatment of 2,3,6-trichloroanisole (2,3,6-TCA) by three advanced oxidation processes (UV, UV/H 2 O 2 and UV/PMS) was compared, and UV/PMS stood out. SO 4 • − and HO• were produced in the UV/PMS, and their specific contributions to 2,3,6-TCA oxidation were investigated. The competitive kinetic model was applied to determine the second-order reaction rate between 2,3,6-TCA and SO 4 •- or HO•. The products of 2,3,6-TCA generated in UV/PMS were analyzed with gas chromatography/high resolution-mass spectrometry (GC/HR-MS), and the degradation mechanism was proposed. The effects of water matrices (chloride, bicarbonate and humic acid) on UV/PMS performance were studied, and the decontamination of 2,3,6-TCA in real water was carried out. The disinfection byproducts (DBPs) alteration from 2,3,6-TCA by UV/PMS - chlorination treatment was explored. Overall, UV/PMS can effectively deal with the T&O pollution of TCA in water.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2025
·Vol. 15
·期 9
·1093
·
IF 2.8
Wei Wang,Qiwen Zhang,Fan Zhang,Hongyue Li,Ying Liu,Kemeng Wei,Yan Zhao,Songlin Yu,Yajun Li,Feng Zhang,Meili Yang,Qing-Qing Hao,Xiaolin Luo
The gas-phase synthesis of anisole from methanol and phenol is currently recognized as the process with the most theoretical research value and industrial application prospect. LaPO4has attracted widespread attention due to its excellent catalytic activity, robust water resistance, and high-temperature performance. In this work, rod-like monoclinic, mixed phase, and hexagonal LaPO4were synthesized using the hydrothermal method, and their catalytic activity was evaluated. The results showed that the catalytic activity of the hexagonal phase is higher than that of the monoclinic phase. By combining relevant characterization methods and DFT theoretical calculations, it is clarified that the higher acidity and stronger alkalinity of the exposed surface of hexagonal LaPO4are the main reasons for its higher activity. Further research has revealed that the main cause of LaPO4deactivation is carbon deposition on the catalyst surface.
研究领域:
催化化学
·
材料科学
·
物理化学
·
工业催化
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Chen Liao,Chunying Zhu,Taotao Fu,Youguang Ma
Deep eutectic solvents (DESs) have been increasingly studied due to their wide application in many fields, such as metal treatment, extraction and separation, chemical synthesis, refinement of biological and natural components, and gas absorption. Water, as an abundant, environmentally friendly, and low-cost resource, can effectively regulate the structure and thermodynamic properties of DES; thus, it is important to study the effect of water on DESs. In this work, DESs with different water contents composed of monoethanolamine (MEA) and p-hydroxyanisole (MEHQ) in various mole ratios (1.0000:1.0000 to 5.0000:1.0000) were successfully prepared, and the density and viscosity were measured at temperatures ranging from 293.15 to 323.15 K using a U-shaped vibrating tube densitometer and a falling ball viscometer. Intermolecular interactions in DES aqueous solutions were investigated by using volumetric and viscometric properties: excess molar volume, thermal expansion coefficient, viscosity deviation, viscous flow activation energy, and excess Gibbs activation energy. The effect of the water content on the structure of DES could be roughly classified into three zones: the zone of structural integrity of DES, the zone of partial destruction of DES, and the zone of freeing of DES components.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE RESEARCH
·
2012
·
IF 2.332
Hai-Min Shen,Hong-Bing Ji
Inspired by β-CD, a macrocyclic oligomers of d -(+)-glucopyranose and a renewable material, which could be obtained from starch, that can promote a lot of organic reactions in water, a green solvent, several amino alcohol-modified β-CDs CD-1 to CD-7 were synthesized in the yields of 36–61%. Their conformations in vacuum and in aqueous solution were optimized by quantum calculation. Their complexes with sodium molybdate prepared in situ were characterized by 1 H NMR and were applied in the asymmetric oxidation of thioanisole. Their performance in inducing enantioselectivity was investigated in detail. For the optimal one, CD-1, moderate enantioselectivity (56% ee) was achieved in aqueous CH 3 COONa–HCl buffer solution (pH 7.0). The abilities of CD-1 to CD-7 to induce asymmetry are highly dependent on the pH value of the reaction medium and the structure of the modifying group. The origin of the moderate enantioselectivity and the reaction mechanism were investigated with the aid of 1 H ROESY NMR studies and quantum calculation. The moderate enantioselectivity was attributed to the two different binding models between CD-1 and thioanisole, which could be defined as intramolecular catalysis and intermolecular catalysis, in which intramolecular catalysis gave ( S )-methyl phenyl sulfoxide and intermolecular catalysis gave ( R , S )-methyl phenyl sulfoxide.
研究领域:
有机化学
·
绿色化学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2022
·
IF 8.129
Wang Li,Wen-Ying Li,Xing-Bao Wang,Jie Feng
During direct coal liquefaction , selective C al –O bond cleavage is critical for phenol production. In this study, anisole and benzyl phenyl ether were chosen as the oxygen-containing model compounds. Radical-induced sites of benzyl phenyl ether were investigated using the Fukui function and energy barrier calculation. The promotion routes of the C al –O bond cleavage in anisole and benzyl phenyl ether by radicals were illustrated. The formation of o -benzyl phenol was regarded as a sign of benzyl radical-induced pyrolysis based on the most optimal path. The competitive process between the optimal path and β-bond scission path was analyzed from the rate constant perspective. Radical-induced pyrolysis made remarkable differences in product selectivity for benzyl phenyl ether. Similarly, the cleavage of the C al –C al bond can also be promoted using two methods of radical induction, which is referred to as a radical chain process. In contrast to benzyl phenyl ethers, the induced pyrolysis of the C al –C al bond in bibenzyl is more likely to occur via β-bond scission after the H of CH 2 is abstracted by a radical. The findings of this research would provide a theoretical foundation for comprehending the radical mechanism of direct coal liquefaction.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2016
·Vol. 40
·期 2
·514-523
·
IF 2.741
Chaoyi Wang,Pan Zou,Ting Zhang,Haipu Li,Zhaoguang Yang
In this work, an in situ acylation combined with solid-phase microextraction coupled to gas chromatography and mass spectrometry method has been developed for simultaneously determining haloanisoles (2,4,6-trichloranisole, 2,4,6-tribromoanisole), and their direct precursors (2,4,6-trichlorophenol, 2,4,6-tribromophenol) and indirect precursors (2-chloropenol, 2,4-dichlorophenol, 2-bromophenol, 2,4-dibromophenol) in water. The key parameters for the solid-phase microextraction were determined by using Plackett–Burman screening and optimized by central composite optimization. Under optimal conditions, the eight compounds can be analyzed in a short time (33 min) with a strong linearity ranging from 2 to 200 ng/L (correlation coefficient greater than 0.996), showing good sensitivities with the limit of detection in a range of 0.23–0.91 ng/L and a limit of quantification of 0.77–3.03 ng/L, good repeatability (2.00–9.10%) and interday precision (1.67–11.3%). When environmental water samples were treated, the recoveries of target compounds were 75.5–127.3%, suggesting that the developed method could be applied in probing the origin of haloanisoles and monitoring halophenols and haloanisoles in natural waters at concentration levels of ng/L.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2016
·Vol. 39
·期 11
·2146-2155
·
IF 2.741
Xiuzhi Bai,Ting Zhang,Haipu Li,Zhaoguang Yang
Chloroanisoles, particularly 2,4,6-trichloroanisole, are commonly identified as major taste and odor compounds in water. In the present study, a simple and efficient method was established for the simultaneous determination of chloroanisoles and the precursor 2,4,6-trichlorophenol in water by using low-density-solvent-based simultaneous dispersive liquid–liquid microextraction and derivatization followed by gas chromatography with electron capture detection. 2,4-Dichloroanisole, 2,6-dichloroanisole, 2,4,6-trichloroanisole, 2,3,4-trichloroanisole, and 2,3,6-trichloroanisole were the chloroanisoles evaluated. Several important parameters of the extraction-derivatization procedures, including the types and volumes of extraction solvent and disperser solvent, concentrations of derivatization agent and base, salt addition, extraction-derivatization time, and temperature were optimized. Under the optimized conditions (80 μL of isooctane as extraction solvent, 500 μL of methanol as disperser solvent, 60 μL of acetic anhydride as derivatization agent, 0.75% of Na 2 CO 3 addition w/v, extraction-derivatization temperature of 25°C, without salt addition), a good linearity of the calibration curve was observed by the square of correlation coefficients ( R 2 ) ranging from 0.9936 to 0.9992. Repeatability and reproducibility of the method were < 4.5% and <7.3%, respectively. Recovery rates ranged from 85.2 to 101.4%, and limits of detection ranged from 3.0 to 8.7 ng/L. The proposed method was applied successfully for the determination of chloroanisoles and 2,4,6-trichlorophenol in water samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Yufan Zhang,Pu Ma,Heyun Fu,Xiaolei Qu,Shourong Zheng
Chloroanisoles is a class of odorous pollutants commonly identified in drinking water . In the present study, we confined noble metal palladium (Pd) in the micropores of zeolite Y ( ie -Pd@Y) using an ion exchange method, and applied it for the catalytic hydrodechlorination removal of chloroanisoles (represented by 2,4,6-trichloroanisole/TCA) in water. Pd supported on zeolite Y surface ( im -Pd/Y, prepared by conventional impregnation method) was used as the benchmarking catalyst. The characterization results revealed that ie -Pd@Y had smaller Pd particle size and higher Pd n+ /Pd 0 ratio than im -Pd/Y. The catalytic hydrodechlorination of TCA followed a concerted dechlorination pathway and the Langmuir-Hinshelwood model. The ie -Pd@Y catalysts with different Pd loadings exhibit excellent catalytic activities with more than 95% of TCA removed within 30 min, which is far superior to the im -Pd/Y catalysts (27–70%). Moreover, due to the confinement effect of zeolite Y, ie -Pd@Y displayed enhanced catalytic stability as compared with im -Pd/Y. The initial activity of ie -Pd@Y was more than 20 times higher than that of im -Pd/Y after five reaction cycles. Additionally, with the assistance of sieving effect, ie -Pd@Y displayed much stronger capability against the interference from dissolved organic matter than im -Pd/Y. The present results demonstrate that the confined catalysts ie -Pd@Y can be applied in liquid phase catalytic hydrogenation to effectively eliminate halogenated odorants in waters.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 13
·130517
·
IF 3.721
Zhaoyu Wang,Lihua Jiang,Chen Liang,Chunpeng Zhao,Zesen Wei,Qingsong Wang
The overcharge issue still occupies a high safety risk for NCM cathode materials with less stable structure. In this work, an original overcharge protection electrolyte additive named as 3-fluoroanisol (3FA) is recommended for NCM 622. The anti-overcharge effect of 3FA was verified in detail by cycle voltammetry, constant-current overcharge and discharge, AC impendence and scanning electron microscopy measurement. The electrolyte conductivity and long-term cycle performance tests were conducted to evaluate the impact of 3FA on the cell system operated in conventional voltage range. The 3FA is electro-polymerized at about 4.4 V and the time from upper cut-off voltage to overcharge state is extended from 5.46 h to 11.82 h in CR2032 cell, no adverse effects are shown during normal use at the same time under the additive amount of no more than 5 wt.%. Moreover, C80 micro-calorimeter test shows that 3FA increases thermal stability of electrolyte and NCM 622 cathode system. The heat production during overcharge was measured further. With the increase of the amount of 3FA added, the heat production during overcharge increases and the peak heat release rate occurs near 4.4 V, which further proves the effect of overcharge protection of 3FA. Thus, 3FA enhances overcharge endurance and thermal stability of lithium-ion battery with NCM 622 cathode.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
·
功能材料
·
电极材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2014
·
IF 2.083
Zhenyu Bao,Weijiang Zhang,Yinglai Chen,Jiao Xu,Xianbao Cui
The densities and viscosities of BF 3 ·anisole and BF 3 ·phenetole complex were determined at T = (283.15 to 303.15)K under atmospheric pressure. The molar ratios of the complexes ranged from 0.0080 to 0.9588 for BF 3 ·anisole and 0.0090 to 0.9850 for BF 3 ·phenetole. The measured densities and viscosities of both complexes were well correlated by modified Guimarães' equation and extended Jones–Dole equation, respectively. The apparent molar volumes were calculated using densities, and the limiting partial molar volumes were obtained by regression analysis. Arrhenius-type equation was adopted to get viscous flow activation energy through data fitting of viscosity values.
研究领域:
物理化学
·
材料科学
✓ 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）