WATER AIR AND SOIL POLLUTION
·
2017
·Vol. 228
·期 8
·1-11
·
IF 1.702
Cheng Guanghuan,Sun Mingyang,Ge Xinlei,Ou Yang,Xu Xinhua,Lin Qi,Lou Liping
Black carbon (BC) is considered to be a promising novel material for controlling organic contaminants due to its strong adsorption property, low production cost, and less secondary pollution. However, seldom systemic research was conducted to investigate adsorption-desorption characteristics and interaction mechanism between BC and nonylphenol (NP), one kind of endocrine-disrupting contaminants (EDCs) and persistent organic pollutants (POPs). Therefore, in the present study, adsorption characteristics of NP on two BCs (rice straw black carbon (RC) and fly ash carbon (FC)) involving adsorption isotherm, kinetics, effect of pH, as well as desorption kinetics, were investigated to explore the feasibility of BC for remediation of NP pollution in a water environment. Adsorption isotherm data showed that Q
max was 61,889.21 ± 2777.68 and 6538.99 ± 606.72 mg/kg and n was 0.39 ± 0.037 and 0.55 ± 0.043 for RC and FC, respectively, suggesting the sorption capacity and nonlinearity of RC to NP is far higher than FC and indicating BC was an effective sorbent for NP pollution control, especially RC. The pH affected BC sorption capacity to NP by influencing the surface properties of BC and the NP speciation together. Desorption kinetics data indicated that more than 80% NP could not be released from both BCs, suggesting that BC could reduce NP releasing risk in a water environment evidently when BC is applied for NP pollution remediation.
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JOURNAL OF FLUORESCENCE
·
2017
·Vol. 27
·期 5
·1721-1727
·
IF 1.461
Wang Fanwei,Duan Hongdong,Xing Dianxiang,Yang Geng
One novel turn-on fluorescence probe founded on conjugated pyrazole Schiff base for detecting Al 3+ was invented. The UV–vis and fluorescence spectrometer were employed to explore optical properties of this probe. The results got from those experiments indicated that this fluorescence probe manifested excellent sensitivity and selectivity for Al 3+ compared with other cations examined(Ag + , Co 2+ , Mg 2+ , Cu 2+ , Ni 2+ , Pb 2+ ,and Zn 2+ ). In addition, this probe displayed a more rapid response and remained stable between pH 6 and 9 by investigating the fluorescence intensity under different response time and various pH values. Remarkably, the detection limit for Al 3+ could lower to 1.0×10 −9 M. Therefore, the probe could be potentially applied to the environment for the detection of Al 3+ , and the availability in biological range of pH that could be further studied to make this probe apply to biological systems in the future.
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JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2017
·Vol. 94
·期 10
·1301-1311
·
IF 1.421
Li Xu,Chen Li,Wu Lan,Xu Hong,Dong Jinxiang
Dehydration acetalization of diglycerol with lauraldehyde in the presence of homogeneous acid catalysts using water as solvent has been studied. The prepared double long-chain diglycerol diacetal was identified as a mixture of six regioisomers by GC and GC-MS. p -Dodecylbenzenesulfonic acid exhibited excellent activity for this acetalization reaction. The reaction parameters with p -dodecylbenzenesulfonic acid catalyst were subsequently optimized in terms of the yield and isomer distribution of diglycerol diacetal. Under the optimum operating conditions, the yield of diglycerol diacetal reached 93.9%, and the selectivity in terms of the distribution of the six regioisomers was found to be in proportions of 24:36:18:11:3:8. Furthermore, the tribological performance of diglycerol diacetal has been evaluated as a potential lubricant base oil by means of an Optimol SRV-V oscillating reciprocating friction and wear tester. The tribological test results revealed that diglycerol diacetal displayed superior lubrication properties compared to the commonly used poly-alpha-olefin (PAO 8).
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2017
·Vol. 84
·期 1
·145-151
·
IF 1.575
Lin Xiuzhen,Guo Bing,Liu Peng,Fan Hongbo
Abstract Silver bromide (AgBr) rods with different polydispersity were first synthesized in situ in oil (dodecane)-in-water emulsion, where AgNO 3 was used as the silver ion source and tetradecyl trimethyl ammonium bromide acted as both the bromide ion source as well as the stabilizing agent. Scanning electron microscopy and X-ray diffraction techniques were carried out to characterize their morphologies and crystal structures. A morphology evolution varying with aging time showed that the AgBr rods in oil-in-water emulsion formed from nanoparticles, and the formation process was disclosed by drop-coating initially formed emulsion onto glass substrate and quick solvents evaporation. Besides, in comparison with commercial P25 (anatase 80%, rutile 20%), the as-fabricated AgBr rods presented excellent photocatalytic activities over methyl orange under direct sunlight irradiation, showing their promising potential as efficient sunlight-driven photocatalysts for organic pollutants degradation. Graphical abstract
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Nano-Micro Letters
·
2017
·Vol. 10
·期 1
·1-10
·
IF 4.849
Li Jingwei,Xu Weiming,Luo Jiaxian,Zhou Dan,Zhang Dawei,Wei Licheng,Xu Peiman,Yuan Dingsheng
The exploration of low-cost and efficient bifunctional electrocatalysts for oxygen evolution reaction and hydrogen evolution reaction through tuning the chemical composition is strongly required for sustainable resources. Herein, we developed a bimetallic cobalt–manganese sulfide supported on Ni foam (CMS/Ni) via a solvothermal method. It has discovered that after combining with the pure Co 9 S 8 and MnS, the morphologies of CMS/Ni have modulated. The obtained three-dimensionally hexagram-like CMS/Ni nanosheets have a significant increase in electrochemical active surface area and charge transport ability. More than that, the synergetic effect of Co and Mn has also presented in this composite. Benefiting from these, the CMS/Ni electrode shows great performance toward hydrogen evolution reaction and oxygen evolution reaction in basic medium, comparing favorably to that of the pure Co 9 S 8 /Ni and MnS/Ni. More importantly, this versatile CMS/Ni can catalyze the water splitting in a two-electrode system at a potential of 1.47 V, and this electrolyzer can be efficiently driven by a 1.50 V commercial dry battery.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 22
·期 2
·581-590
·
IF 2.316
Liu Yi,Ma Xiaoyan,Sun Kun,Yang Kaiqi,Chen Fang
As a kind of organic–inorganic hybrid materials with nanocage structure, polyhedral oligomeric silsesquioxane (POSS) has the advantages of good interaction with polymer and excellent thermal and mechanical stability. Star-shaped polyhedral POSS-poly(methyl methacrylate) (POSS-(PMMA
n
) 8 ) with different molecular weights had been synthesized by sequential atom transfer radical polymerization (ATRP) with POSS-(C 3 H 6 Cl) 8 as the initiator. Electrospun polyvinylidene fluoride (PVDF) composite gel polymer electrolytes (GPEs) modified by POSS-(PMMA
n
) 8 were prepared, and their electrochemical and mechanical properties were assessed. The POSS-(PMMA
n
) 8 particles were found to improve thermal stability and mechanical strength of the GPEs without decreasing electrochemical properties. Among all composite GPEs studied, the best comprehensive performance was obtained from PVDF-[POSS-(PMMA 46 ) 8 ] GPE: the porosity was 60.0%, and the tensile strength and the elongation at break were 4.94 MPa and 52.2%, respectively. Besides, the ionic conductivity was 4.85 × 10 −3 S cm −1 at room temperature, the electrochemical window could reach 6.0 V, and the interfacial impedance with Li electrode was 256.15 Ω. The cells with POSS-(PMMA) 8 -modified composite electrolytes also have good cycle performance. These results suggest that the PVDF-[POSS-(PMMA) 8 ] composite GPEs are suitable for lithium-ion battery applications.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 5
·1-11
·
IF 2.02
Feng Jiantao,Wang Yechen,Hou Yanhui,Li Liangchao
Hierarchical structured ZnFe 2 O 4 @reduced graphite oxide@TiO 2 (ZnFe 2 O 4 @RGO@TiO 2 ) nanocomposite was prepared by an electrostatic layer-by-layer route, which played a synthetic effect of Fenton oxidation of ZnFe 2 O 4 and photocatalytic oxidation of TiO 2 to degrade fulvic acid (FA) solution under visible-light irradiation. In this method, RGO, as the middle layer, can effectively promote the photo-induced electron flow between the ZnFe 2 O 4 and TiO 2 and further improve the efficiency of the photo-Fenton oxidation. The influencing factors on photo-Fenton oxidation, including solution pH, catalyst, and H 2 O 2 dosage, have also been investigated. The results illustrated that the ternary composite presented the enhanced catalytic performance. Under visible light irradiation, the degradation efficiency of the sample on the FA solution can reach 95.4% within 3 h. In addition, the catalyst exhibited superior stability and reusability, and its degradation efficiency was still up to 90% after 5 cycles. Therefore, the composite will be a kind of efficient photocatalyst and had a promising application for visible-light driven destruction of organic pollutants.
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WATER AIR AND SOIL POLLUTION
·
2017
·Vol. 228
·期 6
·1-13
·
IF 1.702
Li Huiqin,Hu Jingtao,Wang Chuan,Wang Xiaojing
Chicken feather, which is consisted of keratin, has always been abandoned as solid waste. The utilization technologies of waste keratin have been developed in electric zones and materials fields so far. Recently, numerous new types of adsorbents have been used for antibiotic removal. The chicken feather carbon is supposed to be a potential one. In this study, an activated feather carbon (AFC) was developed as the absorbent of amoxicillin (AMOX) in simulated wastewater. The micropore structures of AFC were detected by the scanning electron microscope (SEM). X-ray photoelectron spectrum (XPS) was recorded and analyzed. A BET surface area, as high as 1838.86 m 2 /g, was measured in this study. At the meantime, a rapid adsorption (5∼7 min) and high removal efficiency (99.63%) could be observed. The kinetics, isotherms, and thermodynamic studies indicated that the adsorption of AMOX by AFC was an exothermic physic-adsorption. The interaction between AMOX and AFC surface was supposed to be a multiple-layer adsorption process for it is well fitted with the Freundlich model. The adsorption behavior could be described by pseudo-second-order model almost perfectly in kinetic studies. In addition, effect of pH, ionic strength, and reusability properties were also discussed in this paper. The AFC was proved to be the most rapid, efficient, and economically absorbent for AMOX removal, which was effective enough under various temperatures and saline circumstances. It was also proved useful, convenient, and renewable in dealing with the tough antibiotic pollutant problems and rebuilding of antibiotic sewage treatment facilities.
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JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 24
·期 5
·1319-1326
·
IF 1.624
Guo Xingzhong,Ding Li,Ren Jing,Yang Hui
Monolithic lithium zirconate (Li 2 ZrO 3 ) with well-defined co-continuous macropores was successfully prepared via an epoxide-mediated sol–gel process accompanied by phase separation. Appropriate choice of poly(ethylene oxide) as a phase separation inducer and propyleneoxide as a gelation agent allows the production of continuous macroporous gel monolith. The dried gels are amorphous and tetragonal lithium zirconate ( t -Li 2 ZrO 3 ) precipitates firstly at 650 °C. The phase transformation from t -Li 2 ZrO 3 to monoclinic lithium zirconate ( m -Li 2 ZrO 3 ) initiates at 900 °C and completes when elevating the calcination temperature to 1000 °C. The macroporous structure is retained after heat-treatment, and the t -Li 2 ZrO 3 monolith with porosity of 43.3% and dense solid skeletons is obtained.
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MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 4
·1029-1036
·
IF 4.58
Zhou Qingxiang,Lei Man,Li Jing,Liu Yongli,Zhao Kuifu,Zhao Danchen
Metal organic frameworks of type MOF-5 exhibit good adsorption capacity for many organic compounds. The authors have used nanoscale silica-coated zerovalent iron and MOF-5 to prepare, by co-precipitation, a novel magnetic nanomaterial of type Fe@MOF-5. Its morphology and structure were characterized by transmission electron microscopy and X-ray diffraction. The nanomaterial is shown to be well suited for magnetic solid phase extraction for five kinds of N- and S-containing polycyclic aromatic hydrocarbons prior to quantitation by HPLC. The limits of detection are in the 25 to 33 ng⋅L −1 concentration range. Four real water samples were used to validate the method, and the recoveries of spiked samples with concentrations of 5 and 10 ppb were found to be in the range between 92.6 and 97.3% ( n = 3). The Fe@MOF-5 sorbent obviously has excellent adsorption capability for such compounds, can be fairly easily synthesized, displays sensitivity, simplicity, ease of operation, and can be prepared at low costs. In our perception, it has a large potential in terms of monitoring such environmental pollutants.
A metal organic framework of type Fe@MOF-5 is found to exhibit good adsorption capacity for N- and S-containing polycyclic aromatic hydrocarbons. A sensitive magnetic solid phase extraction method with Fe@MOF-5 was developed for the determination of N- and S-containing polycyclic aromatic hydrocarbons from the water samples.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Wang Zhitong,Liu Dongyu,Xia Chenfeng,Shi Xiaodong,Zhou Yansong,Liu Qiuwen,Huang Jiangtao,Wu Haiyan,Zhu Deyu,Zhang Shuyu,Li Jing,Deng Peilin,Vasenko Andrey S.,Xia Bao Yu,Tian Xinlong
Acidic electrochemical CO 2 conversion is a promising alternative to overcome the low CO 2 utilization. However, over-reliance on highly concentrated K + to inhibit the hydrogen evolution reaction also causes (bi)carbonate precipitation to interfere with catalytic performance. In this work, under the screening and guidance of computational simulations, we present a carbon coated tip-like In 2 O 3 electrocatalyst for stable and efficient acidic CO 2 conversion to synthesize formic acid (HCOOH) with low K + concentration. The carbon layer protects the oxidized In species with higher intrinsic activity from reductive corrosion, and also peripherally formulates a tip-induced electric field to regulate the adverse H + attraction and desirable K + enrichment. In an acidic electrolyte at pH 0.94, only 0.1 M low K + is required to achieve a Faradaic efficiency (FE) of 98.9% at 300 mA cm −2 for HCOOH and a long-time stability of over100 h. By up-scaling the electrode into a 25 cm 2 electrolyzer setup, a total current of 7 A is recorded to sustain a durable HCOOH production of 291.6 mmol L −1 h −1 .
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Wang Tao,Zheng Qian,Yang Qian,Guo Fang,Cui Haiyan,Hu Meng,Zhang Chao,Chen Zhe,Fu Shanlin,Guo Zhongyuan,Wei Zhiwen,Yun Keming
Ketamine has recently become an anesthetic drug used in human and veterinary clinical medicine for illicit abuse worldwide, but the detection of illicit abuse and inference of time intervals following ketamine abuse are challenging issues in forensic toxicological investigations. Here, we developed methods to estimate time intervals since ketamine use is based on significant metabolite changes in rat serum over time after a single intraperitoneal injection of ketamine, and global metabolomics was quantified by ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry (UPLC-Q-TOF–MS). Thirty-five rats were treated with saline (control) or ketamine at 3 doses (30, 60, and 90 mg/kg), and the serum was collected at 21 time points (0 h to 29 d). Time-dependent rather than dose-dependent features were observed. Thirty-nine potential biomarkers were identified, including ketamine and its metabolites, lipids, serotonin and other molecules, which were used for building a random forest model to estimate time intervals up to 29 days after ketamine treatment. The accuracy of the model was 85.37% in the cross-validation set and 58.33% in the validation set. This study provides further understanding of the time-dependent changes in metabolites induced by ketamine abuse.
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