Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Meesam Ali,Xiang Zhang,Ayesha Idrees,Muhammad Tariq,Muhammad Danish,Usman Farooq,Ali Shan,Xihao Jiang,Jingyao Huang,Shuguang Lyu
This study demonstrated the prolonged benefits of polyvinyl-coated calcium peroxide (PVA@CP) in Fe(II)/nFeS mediated Fenton-like reaction. PVA@CP was prepared by a coating of PVA on calcium peroxide (CP) and synthesized nano-sized iron sulfide (nFeS) was characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM) with energy dispersive spectroscopy (EDS) elemental mapping, X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma optical emission spectroscopy (ICP-OES) and Fourier transmission infrared (FTIR) techniques. Trichloroethylene (TCE) degradation in various oxic environments (H 2 O 2 , CP, or PVA@CP) was investigated using Fe(II)/nFeS, and the slowest rate constant of 0.031 M −1 min −1 with 91 % TCE removal highlighted the long-lasting effects of PVA@CP. The effect of initial solution pH revealed that the acidic condition was most favorable. PVA@CP system accumulated the least amount (6.34 mg/L) of Fe(III) than H 2 O 2 and CP systems. Electron paramagnetic resonance (EPR) and scavenging tests highlighted that free hydroxyl radicals (HO free ) contributed dominantly in H 2 O 2 system while both free and surface-bound species participated well in CP and PVA@CP systems. Moreover, the insight mechanism of regenerated Fe(II) on the nFeS surface was explored by XPS. Both oxidation and reduction of sulfur were discussed and declared that S(-II) was responsible for regenerating Fe(II). The recycling sample checked the reusability of nFeS, and 98.8 % TCE removal in actual groundwater emphasized that PVA@CP/Fe(II)/nFeS is a viable technique. In conclusion, the PVA@CP/Fe(II)/nFeS system is highly recommended for long-lasting remediation of TCE contaminated groundwater.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2020
·
IF 4.303
Taotao Li,Mingyang He,Jun Zeng,Zhongsuzhi Chen,Qu Hongxia,Xuewu Duan,Yueming Jiang
The effect of choline chloride (ChCl) on litchi pericarp browning and the potential regulating mechanism was investigated in this study. Results showed that 1 g L −1 ChCl significantly inhibited the development of pericarp browning and reduced respiration rate of litchi fruit. Meanwhile, choline chloride treatment delayed the programmed cell death (PCD) indicated by lower DNA laddering, inhibition of programmed cell death-related genes expression and higher soluble protein content. Additionally, ChCl treatment maintained higher ATP content and energy charge due to higher level of glycine betaine and regulation of energy metabolism related genes and ATPase activities by ChCl treatment. Finally, higher ATP status in ChCl treated fruit resulted in lower accumulation of reactive oxygen species via enhancing the activities of superoxide dismutase, catalase and ascorbate peroxidase. Taken together, the results obtained in this study suggested that choline chloride reduced pericarp browning of litchi fruit possibly through inhibiting energy deficiency mediated PCD .
研究领域:
植物生理学
·
食品科学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Dongqing Liu,Zexian Zhu,Yiping Zhao,Yingbo Chen,Yankun Tan,Yufeng Zhang
A co-polymer (SPAA6) of 5-sulfoanthranilic acid (5SAA) and ε -caprolactam was used to prepare membrane through nonsolvent induced phase separation (NIPS) method. The micro-structure of membrane was adjusted by small molecules to improve mechanic strength and performance, involving 7 commercial ionic surfactant and a self-synthesized one, S20. S20 showed the best compatibility with SPAA6, which converted spherical phase into network of strip-like units in micro-structure of membrane. Meanwhile, average pore size of the membrane was narrowed from 4.271 nm to 3.391 nm, tested by BET method. Tensile strength of membrane was improved from 2.5 MPa to 2.9 MPa. Therefore, anionic dyes rejection and membrane stability were both improved. It actually demonstrated that molecular weight distribution of SPAA6 was crucial for micro-structure construction of membrane since S20 was the SPAA6 of low molecular weight . In blend solution filtration test, membrane MS2 (1:2 for S20:SPAA6) displayed 98.22% rejection to Congo Red (CR) acid and 96.18% NaCl permeation under 1 bar. It showed 80.18% rejection to chrome blue K (ABK) and 96.28% NaCl permeation. Both water permeance were higher than 3.5 L·m −2 ·h −1 ·bar. Membrane MS2 showed the potential of fractionation of dye and NaCl, which was promising in textile waste water treatment .
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2018
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IF 2.011
Bo Wu,Lei Zhang,Shuai Lin,Jingfa Li,Qihao Zhou
Photoresponsive molecules have been widely applied to solar cells and molecular devices. In this manuscript, we report the photoresponsive behaviours of chlorophosphonazo III, a cheap commercially available molecule and previously only used as a colorimetric reagent for earth metals, focusing on the photoisomerization properties in solution or on TiO 2 substrates. Apart from the optomechanical properties, the chlorophosphonazo dye is found to generate a weak but non-negligible photocurrent under the visible light in aqueous environment. Density functional theory calculations are used to understand the structural, electronic and optical properties of the functional molecule. Possible routes to enhance the optoelectronic and optomechanical performance of chlorophosphonazo III toward multiple functions in integrated devices where both of the optomechanical and optoelectronic performances are desired are suggested.
研究领域:
材料科学
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物理化学
·
计算化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Ying Tang,Rajarshi Roy,Zuhong Zhang,Yanchun Hu,Feng Yang,Chaochao Qin,Lulu Jiang,Hairui Liu
Adjusting the electron transport layer (ETL) is an effective method to improve the power conversion efficiency (PCE) of perovskite solar cells (PSCs) as well as suppress their hysteresis. In this study, we report that RbCl doping TiO 2 can enhance the crystallinity of perovskite and reduce hysteresis as well. As RbCl crystallite has a polyhedral structure and lattice parameters similar to those of the perovskite by calculation confirmed. According to the seed-mediated growth theory, seed-mediated perovskite formation results in a dense and uniform active layer with excellent crystallinity and low trap density, which can reduce the interfacial charge accumulation and carrier recombination. Consequently, the PSCs with the RbCl-doping ETL show remarkably enhanced performance (from 18.67% to 20.75%). Impressively, negligible hysteresis, high fill factor (FF, over 80%) can be observed for the perovskite with the modified ETL. This work is expected to provide a viable path to design a simple-processing ETL for efficient PSCs.
研究领域:
材料科学
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光伏技术
·
能源研究
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 10
·106502
·
IF 4.386
Xiaoyun Xu,Hong Zhou,Jihui Zhang,Yanping Li,Yunjun Yang,Yishan Fang,Zhengzong Wu,Bo Cui,Qiong Hu
The inappropriate and excessive use of chlorpyrifos has caused major damage to food safety and human health. Developing a simple, yet sensitive detection method for chlorpyrifos residues is urgently needed but still a challenge. Photoelectrochemical (PEC) sensor with high photoelectric conversion efficiency is of great significance for the detection of chlorpyrifos residues in food. In this work, a novel PEC sensor based on polythiophene derivative film (PS2TTz) for the detection of chlorpyrifos is constructed via simple one-step electropolymerization within only 3.5 min Scanning electron microscopy (SEM), raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and other characterizations verified the effective decoration of PS2TTz film on the GCE, and the possible reaction mechanism between PS2TTz and chlorpyrifos was discussed. The PEC signal could be greatly decreased by PS2TTz film with chlorpyrifos due to the blocked transfer of electrons, leading to high sensitivity and good selectivity. On the basis of the proposed photoelectrochemical mechanism, the PEC sensor exhibited significant detection performance toward chlorpyrifos in the range of 1 to 218.92 μg l−1 with a LOD of 0.36 μg l−1 (S/N = 3). Impressively, the constructed PEC sensor was successfully applied in green vegetables, which expanded the scope for the detection of chlorpyrifos in practical application.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 2
·025309
·
IF 2.025
Jingdan Zhang,Yongqing Zhai
To improve the application performance of organic montmorillonite (OMt) and meet the OMt performance requirements of different fields, herein, we developed a synergistic modification method to prepare cationic–nonionic OMt (CN-Mt) using the emulsifier OP-10 and hexadecyltrimethylammonium chloride (CTAC) as comodifiers. The structure, morphology and properties of CN-Mt, cationic-OMt (C-Mt) and nonionic OMt (N-Mt) were studied by XRD, SEM, DSC, and contact angle and swell index measurements. CN-Mt has a larger layer spacing and thinner lamellae, which are obviously different from those of C-Mt and N-Mt. Moreover, CN-Mt was hydrophobic due to its denser organic surface molecules. The interlayer spacing of CN-Mt is positively related to the amount of modifier, and the amount of OP-10 contributes more to the interlayer spacing than CTAC. When the amounts of OP-10 and CTAC are 1.3 and 0.8 times the Mt cation exchange capacity (CEC), the interlayer spacing of the optimal CN-Mt is 4.49 nm, which is significantly higher than that of C-Mt (4.11 nm) at a 2.9 CEC, N-Mt (4.26 nm) at a 1.7 CEC and CN-Mt (4.20 nm) at a 0.9OP-10 + 1.5CTAC CEC. Benefitting from its structural merits, CN-Mt shows a higher degree of lamella separation, peeling and dispersion than C-Mt and N-Mt, as well as good thermal stability. Moreover, the lipophilicity and expansion of CN-Mt in medium- and low-polarity media are better than those of single-component OMt. Therefore, the structure and properties of CN-Mt can be controlled by adjusting the types and amount of modifier, further meeting the performance requirements of various application fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 33
·e52797
·
IF 3.057
Guanfei Liu,Meiling Guo,Shishan Xue,Xi Yang,Li Wang,Chuanxia Zhao,Dong Xiang,Hui Li,Jingjuan Lai,Zhenyu Li,Yuanpeng Wu
Recently, the wearable electronic devices have attracted extensive attention while the low stretchability and freezing-induced performance deterioration largely limit the applications in many fields. In this work, the poly(acrylamide- co -maleic acid) hydrogels are immersed in the triethylene glycol/sodium chloride/water solution to establish the dual-crosslinked organohydrogels, which present the extraordinary stretchability (1322 ± 75%) ascribed to the energy dissipation of physical interactions and stability of chemical crosslinked networks. Triethylene glycol forms strong hydrogen bonds with water, which interfere with the formation of intermolecular hydrogen bonds among water molecules at low temperatures and inhibit the formation of ice crystals in the organohydrogel networks. Sodium chloride imparts excellent electrical conductivity to the organohydrogel. As a result, a stretchable electronic sensor based on the organohydrogel is fabricated, which is strain-sensitive with a wide strain sensing window (0%–440%) and excellent stability. More importantly, the sensor based on the as-prepared organohydrogel could precisely detect various activities of the human model at −30°C leading to the widely application prospects.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Meng Cui,Jingtong Li,Dayong Lu,Ziqiang Shao
The present study proposed a facile and highly sensitive electrochemical sensor based on a carbon paste electrode modified by the metal–organic framework (MOF) [Cu(bpy)(H 2 O) 2 (BF 4 ) 2 (bpy)] for the analysis of 2,4-dichlorophenol (2,4-DCP). X-ray diffraction (XRD) and Fourier transform infrared spectrometry (FT-IR) were used to investigate the morphology and composition, respectively, of [Cu(bpy)(H 2 O) 2 (BF 4 ) 2 (bpy)]. Additionally, cyclic voltammetry (CV) was carried out to study the electrochemical performance. Considering the high charge transfer efficiency, strong adsorption capacity and large specific surface area of [Cu(bpy)(H 2 O) 2 (BF4) 2 (bpy)], our developed sensor was favorably selective to the detection of 2,4-DCP under optimum parameters, with a wide linear range of 4 to 100 μM and a low limit of detection (LOD) of 1.1 μM.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2017
·
IF 6.32
Min Liu,Liyan Zhang,Yue Hua,Luping Feng,Yao Jiang,Xiju Ding,Wei Qi,Hua Wang
Mesoporous silver–melamine (Ag–MA) nanocomposites were synthesized simply by the controlled supermolecular self-assembly process to be modified onto the electrodes for the electroanalysis of multiple sulfides in blood or wastewater. It was discovered that Ag–MA nanocomposites could be prepared with various morphological structures depending on the Ag-to-MA ratios. Furthermore, the electrodes modified with mesoporous Ag–MA nanowires could display stable and sharp electrochemical peaks of solid-state AgCl at a considerably low potential approaching zero, thus circumventing any interference from possibly coexisting electroactive substances in the background. More importantly, the yielded AgCl signals would decrease selectively induced by sulfides through the specific sulfide–chloride replacement reactions toward the transferring of AgCl into non-electroactive Ag2S. The developed electroanalysis strategy could facilitate the selective detection of multiple sulfides (i.e., S2– or H2S, Sx2–, cysteine, and S2O32–) in the complicated media with high-level salts such as blood and wastewater, showing a linear concentration range from 0.50 to 512 μM as exemplified for S2– ions in blood. Such an electroanalysis device equipped with the portable electrochemical transducer can be tailored for the field-deployable monitoring of a variety of sulfides in clinical and environmental analysis fields.
研究领域:
材料科学
·
分析化学
·
环境科学
·
医学诊断
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Qingyin Li,Kai Sun,Yuewen Shao,Shu Zhang,Zifeng Yan,Lijun Zhang,Qing Liu,Yi Wang,Xun Hu
Development of an eco-friendly and effective reaction system for production of platform chemicals like 5-hydroxymethylfurfural (HMF) has always been a hot topic in biorefineries. In this study, the acidic deep eutectic solvents (DESs) coupled with chromium chloride (CrCl3) have been developed for effective conversion of fructose to HMF under a microwave-assisted manner. The acidic DES was composed of an organic acid and choline chloride (ChCl). Among the organic acids screened, the ChCl–HCOOH system was found to be the most effective medium for the HMF production, which was attributed to the smaller molecular structure and stronger acidity. Such an observation was also consistent with the larger interaction potential energy between fructose and ChCl–HCOOH obtained from the Monte Carlo simulation. In addition, a synergistic effect achieved from the ChCl–HCOOH/CrCl3 mixture played a vital role on the formation of HMF. The ChCl–HCOOH/CrCl3 system could be reutilized without remarkable change in HMF yield, indicating the advantages of ease of recovery and high catalytic stability.
研究领域:
生物化工
·
催化化学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Na Song,Wei Shan,Xiao Xie,Qiong Sun,Liyan Yu,Lifeng Dong
Poor chlorine resistance is a major factor affecting service life of aromatic polyamide reverse osmosis membranes . Herein, alkali-responsive polymer nanocontainers are designed and constructed via emulsified cross-linking and electrostatic self-assembly of sodium alginate , chitosan, and polyaspartic acid around chitosan nanoparticles , and the nanocontainer is integrated into polyamide layer of thin film composite membranes. The nanocontainer does not only provide more channels for water molecules to improve membrane permeability, but also during routine alkaline washing process, polyaspartic acid at the outer layer reacts with alkaline agent to release healing agents: sodium alginate and chitosan to heal damaged sites to restore membrane performances . For example, with the addition of 0.005 wt% nanocontainers, water flux was increased by 32.8% compared to pristine membranes without sacrificing NaCl rejection. After soaking in alkaline cleaning solution, NaCl rejection of the membrane degraded by 2000 ppm active chlorine can be recovered by 97.3%. Therefore, self-healing nanocontainers can greatly improve chlorine resistance, water flux, and stability of polyamide reverse osmosis membranes.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）