CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Jianming Pan,Jun Zeng,Qin Cao,Heping Gao,Yongchao Gen,Yinxian Peng,Xiaohui Dai,Yongsheng Yan
In this work, the hierarchical porous foams (HPFs) were fabricated and applied as the novel adsorbent for simultaneous removal of λ-cyhalothrin (LC) and Cu(II). Macroporous poly(glycidyl methacrylate) foams (MPGMA) with highly interconnected pore network were firstly prepared by high internal phase emulsions (HIPEs) template. Then carboxylated mesoporous silica nanoparticles (CMSNs) were grafted onto the interface of macroporous foams via the reaction between epoxy groups on MPGMA and carboxyl groups on CMSNs . The as-prepared HPFs composites possessed macropores ranging from 10 μm to 40 μm and uniform mesopores on average of 2.5 nm, and their large amount of carboxyl groups resulted in a favorable adsorption for λ-cyhalothrin (LC) and Cu(II). In single adsorption, the maximum adsorption capacity of HPFs for LC and Cu(II) were 80.11 mg g −1 and 21.79 mg g −1 at 288 K, respectively. The adsorption mechanism between LC and HPFs could be the hydrogen bonding and hydrophobic interaction, while the electrostatic attraction maybe the main interaction between Cu(II) and HPFs. Binary adsorption showed that the enhanced adsorption capacity of LC was 104.1 mg g −1 in the presence of 15 mg L −1 Cu(II) at 288 K, and the excellent result of Cu(II) was 22.23 mg g −1 with the mixed solution of 50 mg L −1 LC at 288 K, indicating the existence of promotion in adsorption ability in the case of coexistence of LC and Cu(II). Moreover, HPFs could maintain stability after five adsorption/desorption cycles in the regeneration steps.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2013
·Vol. 6
·期 3
·915-923
·
IF 1.855
Zhilong Song,Chunbo Liu,Jianming Pan,Yongsheng Yan,Xiao Wei,Minjia Meng,Ping Yu,Lin Gao,Jiangdong Dai,Shuang Lin
Porous silica nanospheres were fabricated using a facile surface-protected etching strategy. Polyvinylpyrrolidone (PVP) was used as a protecting polymer adsorbed on the surface of silica nanospheres and NaOH was employed as an etching agent. Owing to the protective action of PVP and inhomogeneous etching, mesopores were created in the silica nanospheres. Then, based on a simple and economical wet-chemical route, highly luminescent YVO4:Eu3+ nanocrystals were then integrated onto the nanospheres to form a highly luminescent mSiO2/YVO4:Eu3+ composite material. This material, which combined the mesoporous structure of SiO2 and the strong red luminescence property of YVO4:Eu3+, could be used as a novel optosensing system. The structure, morphology, porosity, and optical properties of the materials were well characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, N2 adsorption/desorption, and photoluminescence spectra, and the optical stability and effect of pH on mSiO2/YVO4:Eu3+ were also evaluated. It was observed that λ-cyhalothrin (LC) could quench the luminescence of mSiO2/YVO4:Eu3+ in a concentration-dependent manner, which was best described by a Stern–Volmer-type equation. This study therefore demonstrated that the composite material could be potentially used as a probe to monitor the residues of LC in water.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Jixiang Wang,Hao Qiu,Hongqiang Shen,Jianming Pan,Xiaohui Dai,Yongsheng Yan,Guoqing Pan,Börje Sellergren
Molecularly imprinted fluorescent polymers have shown great promise in biological or chemical separations and detections, due to their high stability, selectivity and sensitivity. In this work, molecularly imprinted fluorescent hollow nanoparticles , which could rapidly and efficiently detect λ-cyhalothrin (a toxic insecticide) in water samples, was reported. The molecularly imprinted fluorescent sensor showed excellent sensitivity (the limit of detection low to 10.26 nM), rapid detection rate (quantitative detection of λ-cyhalothrin within 8 min), regeneration ability (maintaining good fluorescence properties after 8 cycling operation) and appreciable selectivity over several structural analogs. Moreover, the fluorescent sensor was further used to detect λ-cyhalothrin in real samples form the Beijing-Hangzhou Grand Canal Water. Despite the relatively complex components of the environmental water, the molecularly imprinted fluorescent hollow nanosensor still showed good recovery, clearly demonstrating the potential value of this smart sensor nanomaterial in environmental monitoring.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Mengying Gan,Jianming Pan,Yunlei Zhang,Xiaohui Dai,Yijie Yin,Qin Qu,Yongsheng Yan
Lignin particles were used as stabilizers to establish a stable Pickering oil–water emulsion, and then the molecularly imprinted polymers (MIPs) were fabricated by radical polymerization in the presence of functional and cross-linked monomers in the oil phase. As-prepared MIPs were observed with a diameter from 10 μm to 65 μm when oil/water ratio increased from 0.11 to 0.68, and exhibited thermal stability and hydrophobic surface. A series of static adsorption experiments were conducted to analyze their adsorption performance for lambda-cyhalothrin (LC). The preliminary results showed that MIPs possessed good recognition toward LC , that is, the adsorption equilibrium time was about 3.0 h and the equilibrium adsorption amount was 72.25 μmol g − 1 for MIPs and 43.10 μmol g − 1 for nonimprinted Polymers (NIPs), respectively, indicating the enhanced selectively adsorption of LC. The adsorption process followed pseudo-second-order model by the kinetic analysis and Freundlich equation by the isothermal analysis, respectively. The selective recognition experiments displayed the outstanding selective adsorption effect of the MIPs for target LC. Moreover, the obtained MIPs could be effectively regenerated and recycled at less three times without significant loss of adsorption capacity.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Xiao Wei,Tongfan Hao,Yeqing Xu,Kai Lu,Hongji Li,Yongsheng Yan,Zhiping Zhou
In this paper, we develop a method by using octadecyl-4-vinylbenzyl-dimethyl-ammonium chloride (OVDAC) as a surfactant to transfer aqueous CdTe quantum dots (QDs) with excellent fluorescent property to organic solvent, after a surface imprinting-directing polymerization process, a high-performance aqueous QDs-polymer fluorescent imprinted composite sensor was obtained and used for highly selective recognition of λ-cyhalothrin (LC). Here, OVDAC was first used in the fabrication of fluorescent imprinted composite sensors, and the OVDAC-modified CdTe QDs were used as the solid supports and auxiliary monomers. Through this novel strategy, strong fluorescence of aqueous QDs was inherited in the resultant MIPs . After the experimental conditions were optimized, a linear relationship was obtained covering the linear range of 0.1–16 μmol L −1 with a correlation coefficient of 0.9989 and a high imprinting factor about 5.99. In addition, the MIPs-OVDAC/CdTe QDs had higher molecular selectivity and sensing specificity than two kinds of molecularly imprinted silica coated QDs which were prepared by the Stöber method and reverse microemulsion method, respectively. The developed method was applicable to routine trace determination of LC in real examples. This study provides a general strategy to fabricate high-performance fluorescent sensors based on QDs which were originally water-soluble for highly selective detection of environmental pollutants.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2014
·Vol. 406
·期 28
·7213-7220
·
IF 3.578
Gao Lin,Wang Jixiang,Li Xiuying,Yan Yongsheng,Li Chunxiang,Pan Jianming
In this study, we report here a general protocol for making core-shell magnetic Fe 3 O 4 /SiO 2 -MPS/MIPs (MPS = 3-(methacryloxyl) propyl trimethoxysilane, MIPs = molecularly imprinted polymers, Fe 3 O 4 /SiO 2 -MPS as core, MIPs as shell) via a surface molecular imprinting technique for optical detection of trace λ -cyhalothrin. The fluorescent molecularly imprinted polymer shell was first prepared by copolymerization of acrylamide with a small quantity of allyl fluorescein in the presence of λ -cyhalothrin to form recognition sites without doping. The magnetic Fe 3 O 4 /SiO 2 -MPS/MIPs exhibited paramagnetism, high fluorescence intensity, and highly selective recognition. Using fluorescence quenching as a detecting tool, Fe 3 O 4 /SiO 2 -MPS/MIPs were successfully applied to selectively and sensitively detect λ -cyhalothrin, and a linear relationship could be obtained covering a wide concentration range of 0–50 nM with a correlation coefficient of 0.9962 described by the Stern-Volmer equation. The experimental results of practical detection revealed that magnetic Fe 3 O 4 /SiO 2 -MPS/MIPs as an attractive recognition element was satisfactory for determination of trace λ -cyhalothrin in honey samples. This study, therefore, demonstrated the potential of MIPs for detection of λ -cyhalothrin in food.
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xu Guo,Dandan Yang,Yu Su,Yanhua Chen,Jie Ding,Lan Ding,Daqian Song
Nowadays, the development of sustainable molecularly imprinted polymers (MIPs) with high selectivity is still challenging due to the limitations of bio-based functional monomers . In this study, the highly selective and porous MIPs (LC-TMIPs) were designed and prepared on short amylose (SAM) as bio-based functional monomers , λ-cyhalothrin (LC) as a template molecule, and tetrafluoroterephthalonitrile as a rigid crosslinking agent. Static, dynamic, and selective adsorption experiments were conducted to investigate the adsorption performance. The results indicated that, compared to MIPs prepared using epichlorohydrin as flexible crosslinking agents, LC-TMIPs exhibited higher imprinting factor (3.93), selectivity (5.78), and adsorption capacity (35.79 mg g −1 ), as well as faster adsorption/desorption kinetics. The LC-TMIPs were used as sorbents for the selective determination of LC in both apple and cucumber samples by high-performance liquid chromatography . Under the optimal extraction conditions, the recoveries of the method reached 92.1–106.1 %, with a linear range of 1.5–30 ng g −1 and a detection limit of 0.5 ng g −1 . The proposed preparation method of LC-TMIPs is expected to open a new way to prepare highly selective and sustainable MIPs for hydrophobic compounds.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Jianming Pan,Yijie Yin,Yue Ma,Fengxian Qiu,Yongsheng Yan,Xiangheng Niu,Tao Zhang,Xue Bai
To recognize and remove targeted organic and inorganic pollutants simultaneously, a simple and outstanding approach was provided to fabricate hierarchical porous molecule/ion imprinted polymers (M-IIPs) with double specific binding sites, Firstly, λ-cyhalothrin (LC) molecules imprinted polymer foam initiators (MIPFIs) with the average void diameter of 8.0 μm were prepared via a W/O Pickering high internal phase emulsions (HIPEs) template stabilized by vinyl-silica particles (V-SPs). Secondly, based on a pore-filled strategy, adjustable amounts of copper ions (Cu(II)) imprinted polymers (IIPs) were incorporated into the macroporous surface of MIPFIs via atom transfer free radical polymerization (ATRP). Owing to the well-defined hierarchical porous structure, M-IIPs possessed enhanced binding kinetics, and the maximum monolayer adsorption capacities of as-prepared M-IIPs were 193.1 μmol g −1 and 169.9 μmol g −1 towards LC and Cu(II), respectively. The imprinting factor ε was 1.942 for LC, while their relative selectivity coefficients α r for Cu(II)/Zn(II) and Cu(II)/Ni(II) were 6.31 and 4.24 times higher than those of non-imprinted polymers (N-NIPs), illustrating that M-IIPs showed excellent molecular recognition in testing solutions. In the binary solution of LC and Cu(II), an enhanced adsorption capacities towards LC and Cu(II) were observed, indicating the existence of promotion in selective adsorption ability in the case of coexistence of LC and Cu(II). Besides, test of reusability suggested that the M-IIPs could be repeatedly used without any significant loss in binding capacity. Overall, this work not only provided new insights into the fabrication of porous imprinted composites with huge specific surface area and binary function, but also highlighted their application for selective and simultaneous removal of LC and Cu(II).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Buyao Zhang,Gaobo Yu,Jiacheng Li,Yuanyuan Liu,Yang Zhou,Yafei Li,Xiuqin Fang,Yue Jiang
Poly-mannuronic acids (PMs) have been considered as great biodegradable polymers as a green carrier for the potential pesticide deliver. In this work, the response surface design and microwave-assisted degradation were employed to obtain the optimum extraction conditions (i.e., 81 °C, 4.1 h, acid concentration 17.65 g/L). Meanwhile, the Ugi multi-component reaction makes the PM to be amphiphilic, called Ugi-PM, which induces the aggregation in aqueous solution at the concentration of 0.0895 g/L. The corresponding chemical structure and thermal stability of PM and Ugi-PM were determined by the FTIR, 1 H NMR and thermogravimetric analysis (TG). Furthermore, the construction of novel emulsion-based delivery system using synthetic Ugi-PM was explored to prepare the pesticide of λ-Cyhalothrin. Interestingly, with the Ugi-PM concentration at 0.5 wt%, the stability of the Ugi-PM emulsion and the sustainable release of λ-Cyhalothrin are better than other concentrations and our previous system without degradation (Ugi-Alg emulsion). It is possible that electrostatic repulsion and steric hindrance derived from the hydrophobic Ugi-PM can promote the stability and flexible structure may be the reason for excellent sustained release of Ugi-PM emulsions in the pesticide deliver. The above-mentioned preparation progress is an efficient way to provide a valuable pesticide formulation.
研究领域:
生物化学
·
农药科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2014
·
IF 2.354
Wenjing Zhu,Wei Ma,Chunxiang Li,Jianming Pan,Xiaohui Dai,Mengying Gan,Qin Qu,Yunlei Zhang
In our study, magnetic molecularly imprinted microspheres (MMIMs) were prepared via Pickering emulsion polymerization. The template λ-cyhalothrin (LC), functional monomers and hydrophobic Fe 3 O 4 nanoparticles, served as magnetic carrier, were contained in oil phase. Modified yeast dispersed in water phase was employed as stabilizer to establish stable oil-in-water Pickering emulsion, and the imprinting process was conducted by thermally initiated radical polymerization of functional and cross-linked monomers. Characterization results indicated that the Pickering emulsion and MMIMs were successfully produced. The MMIMs possessed thermal stability (below 200 °C), magnetic sensitivity ( M s = 0.73 emu g −1 ) and magnetic stability (over the pH range of 2.0–8.0). Then, the MMIMs were used as sorbents for the selective recognition of LC. The Langmuir isotherm model gave a better fit to the experimental data, indicating the monolayer molecular adsorption for LC. The adsorption kinetic data was well described by the pseudo-second-order kinetics model, suggesting that the chemical process could be the rate-limiting step in the adsorption of LC. The selectivity study displayed the excellent selective recognition for LC compared to structural analog and non-analog in unitary and binary solutions. Furthermore, the satisfying regeneration capability of the sorbents was proved by at least three repeated adsorption–desorption cycles.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Jianming Pan,Yue Ma,Jun Zeng,Xianghen Niu,Tao Zhang,Fengxian Qiu,Yinxian Peng,Yongsheng Yan
Bio-adhesive immobilization of hollow polydopamine capsules (HPDA) onto macroporous poly(glycidyl methacrylate) foams (MPGMA) was implemented via the layer-by-layer assembly in the presence of dopamine “glue”, and then as-prepared HPDA-MPGMA with dual binding sites were employed as adsorbents for simultaneous removal of λ-cyhalothrin (LC) and copper ions Cu(II). The results of characterization showed that HPDA-MPGMA had stable and porous architecture, and the surface morphology and microstructure of HPDA-MPGMA can be finely tuned by adjusting the assembly cycles. In single adsorption, kinetics experiment demonstrated that binding step was fast and that it could be well described by the pseudo-second order-equation where the equilibrium time were 180 min for LC and 60 min for Cu(II). Additionally, the maximum adsorption capacity at 298 K calculated from Langmuir adsorption isotherm were 47.40 mg g −1 and 12.09 mg g −1 for LC and Cu(II), respectively. Furthermore, binary adsorption suggested that the enhanced adsorption capacity of LC was 51.59 mg g −1 and 54.77 mg g −1 in the presence of 10 mg L −1 and 30 mg L −1 Cu(II) at 298 K, respectively, and the same promotion in adsorption ability of Cu(II) was observed when the concentration of coexistent LC ranged from 3.0 mg L −1 to 5.0 mg L −1 , indicating the partial complexation of Cu(II) and LC by means of the coexistence at low concentration could slightly improve the simultaneous adsorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2016
·Vol. 32
·期 11
·2794-2802
·
IF 0.844
CHEN Xiang,PAN Jian-Ming,YAN Yong-Sheng
Macroporous polymer foams (MPFs) were prepared through oil-in-water (O/W) Pickering high internal phase emulsions (HIPEs) stabilized by the natural clay halloysite nanotube (HNT) nanoparticles with the addition of small amounts of the nonionic surfactant Tween 85. The resulting MPFs
were characterized, and the results showed an open cell structure with interconnected pores and a hydrophilic surface with a suspended state in aqueous solution. These features were beneficial for the adsorption of pyrethroids. Moreover, the adsorption of λ-cyhalothrin on MPFs
was examined to determine the kinetic and equilibrium data of the adsorption process. The findings of the kinetic and equilibrium studies revealed that a pseudo-second-order kinetic model and the Langmuir isotherm were the best fitted models (R
2>0.99), implying that the
process of adsorption is a monolayer and chemically reactive. In addition, the maximum adsorption capacity and equilibrium time for λ-cyhalothrin on MPFs were estimated to be 23.98 μmol·g-1 and 240 min at 298 K. Increasing the temperature led to an increase
in adsorption capacity. Increasing the initial concentration of λ-cyhalothrin led to an increase in clear adsorption capacity. Finally, the suspended MPFs represent a promising and reliable adsorbent for the removal of hydrophobic organic pollutants from aqueous solutions.
研究领域:
环境科学
·
材料科学
·
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）