NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Ziyu Tang,Chuanlin Mou,Yadong Li,Shihao Chen,Xianmin Yang,Xu Ding,Hongbo Deng,Linyuan Wang
Here, we report a controllable strategy for fabricating monodispersed microspheres composed of poly(butyl methacrylate) (BMA) and silane-modified Cu/Ni-embedded metal-organic framework (MOF)-TiO₂ composites (denoted as BMA@Cu/Ni@MOF-TiO₂ microsphere) for efficient photocatalytic degradation. Monodispersed oil-in-water (O/W) emulsion templates are prepared by a microfluidic device, which contain silane-modified Cu/Ni@MOF-TiO2 in oil phase. Utilizing benzildimethyl ketal (BDK) as a photoinitiator, porous microspheres can be obtained through a straightforward photopolymerization process initiated by ultraviolet light. When the concentration of the surfactant polyglycerol polyricinoleate (PGPR 90) is 14% (w/v) and the crosslinker trimethylolpropane trimethacrylate (TMPTMA) is 12% (w/v), the BMA@Cu/Ni@MOF-TiO2 microspheres have good monodispersity, and the average diameter is 180.7 μm and coefficient of variation (CV) is 3.64%. When silane-modified Cu/Ni@MOF-TiO2 loading is 0.4% (w/v), the removal rate to methylene blue (MB) is up to 96.2% in 20 min, which is higher than that of powdered (86.6%). Under the optimal conditions, the removal rate of methylene blue reached 99.3% within 50 minutes. Moreover, after 5 cycles of testing, the degradation efficiency remained above 97.94%,, which strongly demonstrated the reusability of BMA@Cu/Ni@MOF-TiO2 microspheres. The photocatalytic mechanism involves the generation of electron-hole pairs in Cu/Ni@MOF-TiO2 under light irradiation, which react with O2 to produce reactive oxygen species (ROS) to degrad MB. The characterization results of XPS, and FTIR show that the silane-modified Cu/Ni@MOF-TiO2 is successfully loaded into the microspheres. BMA@Cu/Ni@MOF-TiO2 microspheres have a specific surface area of 5.962 m2/g and a specific volume of 2.491 cm3/g, providing sufficient diffusion channels and active sites for MB dyes. Therefore, BMA@Cu/Ni@MOF-TiO2 microspheres have excellent recyclability, high stability and attractive photocatalytic degradation efficiency, and show potential application prospects in the future treatment of dye wastewater.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yilin Wang,Qian Fu,Jia Chen,Yueli Lin,Yaqi Yang,Chenxi Wang,Yixi Xie,Pengcheng Zhao,Junjie Fei
Catechol is a phenolic environmental pollutant that is highly toxic to living organisms and is released into the environment, where it is difficult to degrade in the ecosystem, thereby contaminating the environment and groundwater. Here, P(NIPAM-co-BMA)/BiPO 4 /BiOCl/MWCNTs nanocomposites were synthesized, and a temperature-controlled "on/off" electrochemical sensor was constructed. In addition, the P(NIPAM-co-BMA)/BiPO 4 /BiOCl/MWCNTs/GCE sensor shows good thermal sensitivity and electrochemical detection of catechol. Reproducible "on/off" switching on the CVs curve can be achieved by controlling the temperature of the solution. Under optimal conditions, the sensor was able to detect catechol in the linear range of 0.5–86.51 μM with a limit of detection of 0.2 μM (S/N = 3). Satisfactory results were obtained for the detection of natural environmental samples (tap water). In addition, the redox mechanism and electrochemical reaction sites of catechol were investigated by scanning rates. This work demonstrates for the first time the combination of temperature-sensitive polymers, bismuth-based compounds and multi-walled carbon nanotubes as electrochemical sensors for the detection of catechol, opening a new window for the sensitive detection of catechol. At the same time, the constructed switch-like electrochemical sensors can be better applied to different special scenarios.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2013
·Vol. 172
·期 2
·701-712
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IF 1.893
Cui Yanjun,Chen Xia,Li Yanfeng,Liu Xiao,Lei Lin,Zhang Yakui,Qian Jiayu
Using emulsion copolymer of styrene (St), glycidyl methacrylate (GMA) and 2-hydroxyethyl methacrylate (HEMA) as seed latexes, the superparamagnetic polymer emulsion particles were prepared by seeded emulsion copolymerization of butyl methacrylate (BMA), vinyl acetate (VAc) and ethylene glycol dimethacrylate in the presence of the seed latexes and superparamagnetic Fe 3 O 4 /SiOx nanoparticles (or Fe 3 O 4 -APTS nanoparticles) through a two-step process, without addition of any emulsifier. The magnetic emulsion particles named P(St-GMA-HEMA)/P(BMA-VAc) were characterized by transmission electron microscope and vibrating sample magnetometry. The results showed that the magnetic emulsion particles held a structure with a thinner shell (around 100 nm) and a bigger cavity (around 200 nm), and possessed a certain level of magnetic response. The resulting magnetic emulsion particles were employed in the immobilization of lipase by two strategies to immobilized lipase onto the resulting magnetic composites directly (S-1) or using glutaraldehyde as a coupling agent (S-2), thus, experimental data showed that the thermal stability and reusability of immobilized lipase based on S-2 were higher than that of S-1.
研究领域:
材料科学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jinhong Huang,Youhao Liao,Guanjie Li,Ning Xu,Mengqing Xu,Weishan Li
The cyclic stability of traditional poly (vinylidenefluoride- co -hexafluoropropylene) (P(VdF-HFP)) and our newly developed poly (butyl methacrylate-acrylonitrile-styrene) (P(BMA-AN-St)) copolymer-based gel polymer electrolyte (GPE) must still be improved to satisfy the increasingly rigid demands of lithium ion batteries that have higher energy densities . Series ratios of P(VdF-HFP) and P(BMA-AN-St) blended membranes were prepared using an electrospinning method to compensate for the disadvantages of a single copolymer-based membrane. The results showed that the compositions of P(VdF-HFP) and P(BMA-AN-St) had sizeable effects on the physical and electrochemical characterization of GPE, in which the P4 membrane and the GPE blending ratio of P(VdF-HFP): P(BMA-AN-St) = 1: 4 had the best properties. Because the P4 membrane showed the best interconnected pore structure and highest porosity, the GPE exhibited the highest ionic conductivity , with a value of 1.4 × 10 −3 S cm −1 at ambient temperature. Due to the better compatibility of the P4-based GPE with a lithium anode and its considerably electrochemical stability, the LiNi 0.5 Mn 1.5 O 4 /GPE/Li coin cell had an excellent cyclic performance, in which a 98% capacity retention under a 1 C rate was maintained after 150 cycles compared to the coin cell that used a pure P(VdF-HFP)-based GPE that maintained 86% of its discharge capacity under the same test conditions. Furthermore, the acceptable rate characterization of the P4-based GPE was presented with a discharge capacity at a 5 C rate that retained 92% of its counterpart at 1 C .
研究领域:
材料科学
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电化学
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储能技术
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高分子科学
·
锂离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Shaoping Ma,Fenfang Li,Zhijian Tan
Aqueous two-phase systems (ATPSs) have been used in the chiral resolution of various enantiomers in recent years. However, it is difficult to recycle and reuse the phase-forming components and chiral selectors in these applications. Therefore, a completely recyclable ATPS that is based on two temperature-responsive polymers, viz. , poly(MAH-β-CD-co-NIPAAm-DMAEMA-BMA) (P NDB-CD ) and poly(NVCL-AM) (P VAm ), was employed for the chiral separation of mandelic acid (MA) enantiomers. The two polymers can be recovered by simply adjusting the temperature; meanwhile, the polymer P NDB-CD can be used as a chiral selector. The factors that affect the chiral resolution process were also investigated. A maximum separation factor ( α ) of 1.49 was achieved via a one-step extraction under the following conditions: P VAm concentration of 14.0 wt%, P NDB-CD concentration of 9.0 wt%, MA concentration of 5.0 mg/g, and system pH of 4.0. Moreover, the two polymers can be easily recycled after the chiral separation process. The recyclable ATPS used for enantioseparation in the current study can provide new ideas for other applications by using enantioselective liquid–liquid extraction (ELLE).
研究领域:
化学
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材料科学
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分离科学
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产品关联
DOI
高影响因子
POLYMER SCIENCE SERIES A
·
2017
·Vol. 59
·期 5
·708-717
·
IF 0.822
Zhang Q. L.,Tian X. H.,Sun J. Y.,Yuan Y. Z.,Zhang K. T.
Nanoparticles including starch- graft -methylmethacrylate, starch- graft -(methylmethacrylate/methyl acrylate), starch- graft -(methyl methacrylate/butyl methacrylate) were synthesized via emulsifier-free emulsion polymerization and were blended with natural rubber latex at various mass ratios. Chemical structure of graft copolymers was confirmed by Fourier transform infrared. Transmission electron microscopy demonstrated the core-shell structures of the nanoparticles distributed uniformly around the natural rubble particles. The tensile strength of blend films was significantly enhanced by addition of graft copolymers. Besides, scanning electron microscopy and atomic force microscopy showed the blend film had smooth surface.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2018
·Vol. 10
·期 2
·228-234
·
IF 4.927
Chao Chen,Xiaofeng Guo,Jinhong Du,Bonnie Choi,Houliang Tang,Anchao Feng,San H. Thang
Miktoarm star (MAS) polymers are polymers with a number of distinct arms connected to a central core. Owing to their exclusive structure, MAS polymers have been extensively studied in recent years. To exploit their biomedical applications the combination of nucleic acids, peptides and saccharides are desired. In this study, RAFT polymerization of three monomers with markedly different properties, N,N-dimethylaminoethyl methacrylate (DMAEMA, cationic), n-butyl methacrylate (BMA, hydrophobic) and oligo(ethylene glycol) methyl ether methacrylate (OEGMA, hydrophilic) was conducted using an RGD peptide based RAFT agent as a chain transfer agent (RGD-CTA). With a disulphide dimethacrylate (DSDMA) redox-cleavable cross-linker, the above linear polymers were combined via an “arm-first” technique to access MAS polymers containing peptide arms. These MAS polymers showed excellent biocompatibility, cell staining performance and rapid redox responsiveness. The novel MAS polymers have potential as a prospective platform for intracellular drug/gene delivery for cancer therapy.
研究领域:
高分子化学
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材料科学
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生物医学工程
·
药学
✓ 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）