CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wenrui Xiang,Ruijuan Qu,Xinghao Wang,Zunyao Wang,May Bin-Jumah,Ahmed A. Allam,Feng Zhu,Zongli Huo
Phenolic endocrine disrupting chemicals (EDCs) such as bisphenol A (BPA), 4-chlorophenol (4-CP) and nonylphenol (NP) are the most commonly detected pollutants in natural environments. The transformation of mixtures of the three phenolic pollutants during chlorination process was studied for the first time in this work. Single phenol can be effectively removed by free chlorine via electrophilic substitution and electron transfer reactions, with the generation of chlorinated phenols and self-coupling products. In mixture solution, the apparent second-order rate constants ( k app ) of 4-CP, BPA and NP at pH 8.0 was increased by 8.6%, 25% and 16%, respectively, as compared to the degradation of single-compound. According to the products identification and density functional theory calculations, the cross-coupling process can occur more easily than the self-coupling reaction, which might accelerate the removal of phenolic mixtures. In addition, humic acid (HA) exerts some inhibitory effect on the degradation of phenolic compounds, due to the competition for chlorine consumption and the reduction of phenoxy radicals to parent phenols. These findings shed light on the environmental fate of phenolic mixtures during aqueous chlorination process, which provide new information for the application of chlorination in water and wastewater treatment.
研究领域:
环境科学
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水处理工程
·
化学动力学
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DOI
高影响因子
Environmental Chemistry
·
2019
·Vol. 16
·期 8
·577-586
·
IF 2.193
Fang-Zhu Xiao,Cheng Wang,Li-Mei Yu,Yi-Qiu Pu,Yu-Li Xu,Kang Zhang,Jia-Qi Luo,Qi-Qi Zhu,Fang Chen,Yong Liu,Chun-Hsing Ho,Guo-Wen Peng,Shu-Ya He
Environmental context Uranium-containing wastewaters have high potential to harm the environment and human health. We found that the combination of calix[4]arene with magnetic Fe3O4 particles produced good adsorption of uranium from wastewater. In addition, this material can be recycled and reused, so it has good prospects in practical applications for uranium remediation. A magnetic functionalised calix[4]arene composite consisting of Fe3O4 and calix[4]arene phosphonate derivative (CPD) was prepared through a facile self-assembly method. The composite was characterised by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD) and Fourier transform infrared spectroscopy (FTIR). The as-synthesised Fe3O4/CPD composite was used to remove UVI from aqueous solutions under different conditions. Meanwhile, the adsorption isotherm, kinetics and thermodynamics were fitted and analysed. The results show that the Fe3O4/CPD composite may be a promising adsorption material for the separation and enrichment of UVI from aqueous solutions in the cleanup of environmental pollution.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
AICHE JOURNAL
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2025
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IF 4
Lixia Li,Zhechao Huang,Menghao Jiang,Jinxing Long
A novel approach is proposed for producing 4-ethylcyclohexanol, a versatile petrochemical in the polymer industry, from the renewable lignin in the presence of Cu–Ni/MgCrO x spinel catalysts. Under the synergistic effect between the Ni 0 , Cu, + and the balanced acidic and basic properties of MgO and MgCr 2 O 4 , an exceptional yield of monomer (30.1 wt%) with 59.5% selectivity of 4-ethylcyclohexanol (yield of 17.9 wt%) was achieved when the depolymerization of bamboo lignin was performed with Cu 6 Ni 20 /MgCr 0.5 O x (Cr:Mg = 0.5). Catalyst characterization illustrated that the formation of MgCr 2 O 4 spinel, which restrained the generation of NiMgO 2 solid solution and increased the concentration of Ni 0 species, along with the surface electron effect between Ni 0 and Cu + , contributes to this superior hydrodeoxygenation performance of lignin. Mechanistic investigation further demonstrated that the conversion of lignin to 4-ethylcyclohexanol involves a tandem process of C β –O bonds cleavage, demethoxylation, and saturated hydrogenation. Therefore, this work provides new insights on lignin utilization.
研究领域:
化学工程
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可再生资源利用
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 31
·10509-10519
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IF 6.4
Chengcheng Zhou,Ding Shen,Xingpeng Chai,Boyang Shi,Wenya Zhu,Guowei Wang
The rapid development of the semiconductor industry puts forward higher requirements on the properties of insulating dielectrics. As a supramolecular compound, calix[4]arene has a unique cavity structure, showing potential for a low-k material. We herein reported a novel strategy to functionalize the 4-tert-butylcalix[4]arene with different numbers of benzocyclobutene (BCB) units (2 or 4) and spacers (–(CH2)3– or –(CH2)6–) by sequential substitution and hydrosilylation reactions. These precursors can be cured under heating to form a crosslinked film. The optimized curation condition was screened by differential scanning calorimetry (DSC) measurement. Combining with a comparison experiment using a precursor with calix[4]arene but without BCB units, the wide-angle X-ray scattering (WAXS) pattern and thermal analysis provided solid evidence that the high thermal stability of the film (glass transition temperature (Tg) > 110 °C, 5 wt% loss temperature >367 °C, and the coefficient of the thermal expansion < 87.88 ppm °C−1) was majorly contributed by calix[4]arene, while the excellent dielectric properties (the lowest dielectric constant Dk = 2.23 and the average dielectric loss Df < 1.5 × 10−3) were synergistically affected by both calix[4]arene and BCB units. The static water contact angle was mostly higher than 100° and high hydrophobicity was confirmed, which can meet the additional requirements in practical application. The low dielectric constant synergized by calix[4]arene and the BCB unit is hoped to aid in developing a novel strategy for low-k materials.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CATALYSIS LETTERS
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2021
·Vol. 152
·期 4
·954-961
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IF 3.186
Shi Shengbin,Wu Yuanfeng,Liu Panli,Zhang Mengting,Zhang Zongqi,Gao Lijing,Xiao Guomin
Synthesis of 5-hydroxymethylfurfural (HMF) from carbohydrates was achieved over the homogeneous catalyst acid poly(4-styrenesulfonic acid) (PSS). The various reaction conditions like reaction temperature, reaction time, various solvent, solvent volume, and catalyst dosages were explored. The results showed that the PSS catalyst resulted in 86.8% HMF yield from fructose and 48.5% HMF yield from glucose in solvent 1-methyl-2-pyrrolidone and dimethyl sulfoxide, respectively. The catalyst has reused five cycles without obviously reduced on HMF yield, suggesting that PSS showed high catalytic activity at recycle experiment. Thus, PSS was a potential candidate for homogeneous catalyst acids and can convert carbohydrate compound into HMF conveniently. Graphical Abstract
研究领域:
化学工程
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可再生资源化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2023
·
IF 3.8
Jiayin Li,Runze Liu,Pengfei Liu,Hu Zhou
The reactive oxygen species (ROS) level as an hopeful strategy for cancer therapy, mainly including photodynamic therapy (PDT) and chemodynamic therapy (CDT). It is well known both PDT and CDT greatly rely on oxygen reliance, inherent flaws of traditional photosensitizers, and lowly selectivity between normal cells and tumor cells. Herein, we reported Zr(IO 3)4 nanoparticles as a biocompatible nanozyme with effective ROS supply by Feton-like reaction and Brady reaction. The Zr(IO 3 ) 4 exhibiting a remarkable selectivity between normal cells and tumor cells. Importantly, the Zr(IO 3 ) 4 , H 2 O 2 -responsive and GSH-depleted nanozymes, were explored for tumor therapy. Nanozyme is highly important from the deep cancer therapy point of view. In this work, we prepared Zr(IO 3 ) 4 by a simple method. The obtained Zr(IO 3 ) 4 samples showed obvious performance in treatment of cancer. It was confirmed by the electron spin resonance (ESR) as well as the fluorescence probe results of Zr(IO 3 ) 4 that the treatment of cancer due to the reactive oxygen species.
研究领域:
生物医学工程
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肿瘤学
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纳米医学
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DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2013
·
IF 0
Yun Xia Jiang,Hu Jin Zuo,Yong Jia Shen,Feng Ping Yi
The Friedel-Crafts acylation reaction between 5-cyanoindole and 4-chlorobutyryl chloride was conducted in ionic liquid 1-buty-3-methylimidazolium chloroaluminate ([bmiCl/AlCl3), the major product was 5-cyano-3-(4-chlorobuty) indole. The structure of the product was characterized by Mass and 1H NMR spectra. When the molar ratio of AlCl3 to [bmiCl in [bmiCl/AlCl3 is at 1:1 or less, no 5-cyano-3-(4-chlorobuty) indole could be obtained. The suitable molar ratios of AlCl3 to [bmiCl in [bmiCl/AlCl3 were from 2:1 to 3:1, the yields of the major product were from 68% to 70%, respectively. When the molar ratio of [bmiCl/AlCl3 to 5-cyanoindole was less than 2:1, the acylation reaction was difficult to carry out, because 5-cyanoindole would be not totally dissolve in [bmiCl/AlCl3 under the situation.
研究领域:
有机化学
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合成化学
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DOI
International Journal of Applied Ceramic Technology
·
2021
·Vol. 18
·期 5
·1570-1581
·
IF 1.968
Yangyi Xu,Xiaohui Wang,Yunge Wei,Yuanxi Liu,Guifang Li
CaGd 2 (WO 4 ) 4 :Eu 3+ phosphors with controllable morphology were synthesized via the hydrothermal method. The influences of pH value, reaction time and Eu 3+ concentration on the crystal structure, morphology, and photoluminescence properties of CaGd 2 (WO 4 ) 4 :Eu 3+ were studied. The pure tetragonal structure CaGd 2 (WO 4 ) 4 is obtained when the pH value is 8 and 9. Furthermore, by altering the pH value of the reaction solution, the morphologies of the CaGd 2 (WO 4 ) 4 :Eu 3+ phosphors evolve from spindle-shaped grains to tetragonal plate-like grains and finally to aggregated bulk particles. Under the 394 nm excitation, the phosphors display a bright red emission corresponding to the characteristic 4 f -4 f transitions of Eu 3+ , and the intensity of emission peaks depends mainly on the pH value, the reaction time, and the Eu 3+ concentration. The optimum photoluminescence performance is achieved for CaGd 2- x (WO 4 ) 4 : x Eu 3+ ( x = 1) phosphor synthesized at pH = 8 under the reaction time of 16 h. Finally, the thermal stability of the phosphors is analyzed at different ambient temperatures.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Yuzhu Li,Jiajun Yang,Lai Xie,Yu Li,Xiwen Liang,Xubing Lu,Xingsen Gao,Jinwei Gao,Lingling Shui,Sujuan Wu,Jun-Ming Liu
In this work, 4-bromoaniline (BrAL) is employed to modify the CsPbI2Br/carbon electrode interface to passivate defects of all-inorganic CsPbI2Br perovskite solar cells (PSCs). The effects of BrAL modification on the structure, light absorption, and trap-state density (Ntrap) of CsPbI2Br films and the carrier recombination process, photoelectrical characteristics, and air stability of the PSCs are systematically studied. The results show that the hydrophobic BrAL interlayer modification can lead to a better matched energy-level alignment, reduce the Ntrap to construct uniform CsPbI2Br films, and suppress carrier recombination to promote charge transport and collection. Thus, the modified PSC achieves a higher power conversion efficiency (PCE) of 11.34% with less hysteresis (reference-PSC, 9.50%) and better stability in ambient air. The BrAL passivation provides a good strategy to enhance the photoelectrical performance and air stability of all-inorganic PSCs.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
NANO
·
2020
·
IF 1.566
Heng Chen,Mengbing Cui,Cuilan Miao,Gairong Chen,Yongchun Zhang
In this work, the function of 4-nitroimidazole (4-NIm) in the formation of Cr-MIL-101 was confirmed. It was found that 4-NIm is an effective additive in the formation of Cr-MIL-101 synthesized at lower temperature. The investigation of crystallization time showed that 4-NIm can prevent Cr-MIL-101 phase converting into Cr-MIL-53 phase. The effect of concentration of 4-NIm on the morphology and the yield of Cr-MIL-101 may therefore be explained by increasing the nucleation rate. The investigation of crystallization temperature revealed that 4-NIm changes the synthesis temperature range of Cr-MIL-101 into 423–463 K. The assistant function of 4-NIm was played through interaction with H + and NO 3 − in the synthesis system, which may lead to enhancement of the deprotonation of H 2 BDC.
研究领域:
材料化学
·
配位化学
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产品关联
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 12
·963
·
IF 3.504
Wei Liu,Xiaolian Zhu,Chengcheng Xu,Zhao Dai,Zhaohui Meng
A new AuNPs-based thermosensitive nanoreactor (SiO2@PMBA@Au@PNIPAM) was designed and prepared by stabilizing AuNPs in the layer of poly(N,N’-methylenebisacrylamide) (PMBA) and subsequent wrapping with the temperature-sensitive poly(N-isopropylacrylamide) (PNIPAM) layer. The new nanoreactor exhibited high dispersibility and stability in aqueous solution and effectively prevented the aggregation of AuNPs caused by the phase transformation of PNIPAM. The XPS and ATR-FTIR results indicated that AuNPs could be well stabilized by PMBA due to the electron transfer between the N atoms of amide groups in the PMBA and Au atoms of AuNPs. The catalytic activity and thermoresponsive property of the new nanoreactor were invested by the reduction of the environmental pollutant, 4-nitrophenol (4-NP), with NaBH4as a reductant. It exhibited a higher catalytic activity at 20 °C and 30 °C (below LCST of PNIPAM), but an inhibited catalytic activity at 40 °C (above LCST of PNIPAM). The PNIPAM layer played a switching role in controlling the catalytic rate by altering the reaction temperature. In addition, this nanoreactor showed an easily recyclable property due to the existence of a silica core and also preserved a rather high catalytic efficiency after 16 times of recycling.Keywords:nanoreactor;distillation precipitation polymerization;catalytic reduction;thermosensitive;AuNPs
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
THERMOCHIMICA ACTA
·
2022
·
IF 3.378
Yiqinq Xia,Linze Liu,Lian Wang,Rui Shi,Shuai Yan,Xingyu Zhao,Yuping Sheng,Zhi Wang
In this paper, a novel 4-allyl-substituted 1,3-benzoxazine (P-a-[4]ally) was successfully synthesized based on the allylation reaction of aldimines. The chemical structures of intermediates (P-1 and P-2) and P-a-[4]ally were characterized by NMR spectra, and Fourier transform infrared (FT-IR) spectra. The polymerization and curing kinetics were studied by DSC and in-situ FT-IR, and the charge densities of atoms were calculated by Materials Studio. The activation energy of the curing reaction was 108.3 kJ·mol −1 by the Kissinger-Akahira-Sunose method and 111.0 kJ·mol −1 by the Ozawa method. Thermomechanical analysis (TMA), thermogravimetric analysis (TGA), and an Agilent impedance analyzer were used to investigate the thermal and dielectric properties of poly-benzoxazine (P(P-a-[4]ally)). The results revealed that the glass transition temperature ( T g ) of P(P-a-[4]ally) was 154 °C, the temperature at 5% weight loss ( T d,5% ) was 329 °C, the char yield was 21.2% at 800 °C under N 2 , and the dielectric constant was 3.33 at 1 MHz.
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）