JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 3
·46984
·
IF 1.901
Xiaojuan Liu,Fengjing Wu,Chaktong Au,Qi Tao,Mingyu Pi,Wenhui Zhang
Molecularly imprinted polymer (MIP) for selective extraction of p -hydroxybenzoic acid ( p -HB) was synthesized by suspension polymerization using p -HB as template, 4-vinyl pyridine as functional monomer and ethylene glycol dimethacrylate as crosslinker. As characterized by scanning electron microscopy, the MIP particles are spherical, with size ranging from 1 to 8 μm. Compared with the non-imprinted polymer (NIP), the MIP shows higher binding capacity toward p -HB: maximum binding capacity for p -HB being 8.07 μmol g −1 over MIP and 3.88 μmol g −1 over NIP. The adsorption of p -HB on MIP follows the Freundlich model and displays pseudo-second-order kinetics. The results of selective and competitive binding experiments confirm that the molecularly imprinted sites have excellent recognition ability toward p -HB. The results reveal that the MIP is a promising adsorbent for selective extraction of p -HB from water samples. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46984.
研究领域:
环境科学
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分析化学
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高分子材料
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污染物去除
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分子识别
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xinxin Lin,Peng Peng,Jianing Guo,Zhonghua Xiang
This study exploits an effective mechanochemical process (termed as reaction milling) to conduct Schiff-based coupling reaction with melamine and terephthalaldehyde for the synthesis of covalent organic polymer (RM-COP) as the carbon skeleton and the derivative phosphorus doped material (RM-COP-PA). Comparing with the tradition solvothermal method with reaction time of 3 days under 120 °C, the newly developed reaction milling method significantly shorten the reaction time of the synthesis to 3 h under room temperature as well as bypassing the usage for hazardous solvents. The space-time yield of the developed reaction milling method for synthesis of the bifunctional electrocatalytic precursor reaches 189 kg m −3 day −1 . Significantly, the optimal products followed by further carbonization (RM-COP-PA-900) demonstrated excellent bifunctional electrocatalytic activities for an efficient ORR performance with similar commercialized Pt/C half-potential of 841 mV vs RHE as well as an IrO 2 -like OER activity with a potential of 1.69 V at 10 mA cm −2 in alkaline media, which is better than most metal-free bifunctional catalysts. Moreover, the obtained RM-COP-PA-900 exhibits much better durability and resistance to crossover effect even than the commercial 20 wt% Pt/C catalysts. Therefore, this work will open up a rapid, solvent-free and scalable approach for, but not limit to, highly efficient electrocatalysts.
研究领域:
材料科学
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电化学
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可持续化学
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能源材料
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纳米技术
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Keer Tan,Jinping Zhao,Linfa Bao,Linjun Shao,Hanyun Liu,Yishuo Dong,Peng Yang
Catalytic combustion is a widely used technology for volatile organic compounds (VOCs) abatement, in which highly active catalysts play a key role. However, catalyst is prone to poisoning during the degradation of VOCs. In order to study anti-poisoning performance, the Cl, S and P heteroatoms were artificially introduced, and the corresponding doped CuO-ZrO 2 catalysts were prepared via a salicylic acid-assisted sol-gel method. The effects of heteroatom doping on the structure, acidity, redox properties and catalytic performance were systematically studied. The results showed that Cl, S and P doping effectively tuned the catalyst structure, active species dispersion and surface Lewis/Brønsted acid sites, which exerted a meaningful influence on catalytic performance of catalysts in the degradation of VOCs pollutants. In addition, compared with the undoped CuZrO, Cl-CuZrO exhibited the highest catalytic performance for degradation of toluene, chlorobenzene and p-chlorotoluene, indicating that the CuO-ZrO 2 catalyst system possessed excellent chlorine resistance. Meanwhile, S-CuZrO showed comparable performance to CuZrO, which demonstrated that the CuO-ZrO 2 catalysts had a certain degree of sulfur resistance. Through the design and optimization of heteroatom doping, this work provided valuable insights for enhancing the catalytic efficiency and structure stability of CuO-ZrO 2 based catalysts.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 6
·2629
·
IF 4.6
Xinru Ma,Xuxia Shai,Yu Ding,Jie Zheng,Jinsong Wang,Jiale Sun,Xiaorui Li,Weitao Chen,Tingting Wei,Weina Ren,Lei Gao,Shukang Deng,Chunhua Zeng
Thermoelectric (TE) technology, which can convert scrap heat into electricity, has attracted considerable attention. However, broader applications of TE are hindered by lacking high-performance thermoelectric materials, which can be effectively progressed by regulating the carrier concentration. In this work, a series of PbSe(NaCl)x(x = 3, 3.5, 4, 4.5) samples were synthesized through the NaCl salt-assisted approach with Na+and Cl−doped into their lattice. Both theoretical and experimental results demonstrate that manipulating the carrier concentration by adjusting the content of NaCl is conducive to upgrading the electrical transport properties of the materials. The carrier concentration elevated from 2.71 × 1019cm−3to 4.16 × 1019cm−3, and the materials demonstrated a maximum power factor of 2.9 × 10−3W m−1K−2. Combined with an ultralow lattice thermal conductivity of 0.7 W m−1K−1, a high thermoelectric figure of merit (ZT) with 1.26 at 690 K was attained in PbSe(NaCl)4.5. This study provides a guideline for chemical doping to improve the thermoelectric properties of PbSe further and promote its applications.Keywords:chemical doping;salt-assisted;NaCl doping;PbSe;thermoelectric material;thermoelectric performance
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 13
·6176-6185
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IF 3.3
Fengjie Bu,Qianrui Xu,Wenjie Jiang,Yingying Wei,Zhifei Wang,Yong Jiang
Magnetic polymer microspheres have received a lot of attention owing to their high biocompatibility, superparamagnetism, and widespread use in protein purification, cell separation, medical diagnosis, targeted drug delivery, and environmental wastewater treatment. In this study, a facile method for preparing magnetic polymer microspheres was presented. First, hollow poly(divinylbenzene-co-methacrylic acid) (P(DVB-co-MAA)) microspheres were synthesized by one-step reflux-precipitation polymerization. Second, Fe3O4 magnetic nanoparticles were precipitated in situ within the microsphere cavities. Magnetic Fe3O4@P(DVB-co-MAA) microspheres have a uniform particle size, good suspension stability, superparamagnetism, and abundant surface functional groups. The particle size of the microspheres as well as the modification of the surface functional groups can be controlled to meet the requirements for practical applications. Furthermore, the magnetic Fe3O4@P(DVB-co-MAA) microspheres show good protein separation capacity. Therefore, this method will have potential in the application of protein separation and purification.
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高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Jingxin Yang,Yongshi Huang,Yuhang Cheng,Xueyan Wu,Jiangyan Lu,Qingnan Wan,Jianxian Feng,Qingyi Zeng,Shuaifei Zhao,Li Yu,Zhu Xiong
In this work, the commonly-used peroxymonosulfate (PMS) activator (copper oxide nanoparticles , CuO NPs) was steadily loaded on a polydopamine (PDA)/polyethyleneimine (PEI)-modified non-woven fabric (NWF) membrane via the typical in-situ deposition method . Distinguished from the simple membrane catalysis separation, the as-prepared hybrid membrane (CuO@PDA/PEI-NWF) showed the better ability in oxidizing the high-toxic p-nitrophenol (4-NP) in feed while its permeate liquid backflowing constantly with the aid of a cross flow device. Within 60 min, even a small area of CuO@PDA/PEI-NWF (9.0 cm 2 ) with only ∼0.2 g weight could generate vast of reactive species ( 1 O 2 , SO 4 •‾ , and • OH) with trace PMS (1 mM) activation, and then reduced ∼40% of COD in a large volume (1 L) of 5 ppm 4-NP polluted water. The removal of 4-NP was further increased with more PMS added in the cyclic membrane catalysis system. The highest degradation rate could be achieved at pH close to the neutral state due to the better redox circle of Cu 2+ /Cu + in the system. Electrospray ionization mass spectrometry (ESI-MS) revealed that the 4-NP structure was primarily destroyed by the addition reaction of radicals (SO 4 •‾ , and • OH), while its oxidation mineralization was caused by the formed 1 O 2, during the cyclic membrane catalysis system. Most importantly, this CuO@PEI/PDA-NWF/PMS cyclic system displayed excellent robustness and sustainability without tedious catalyst separation/regeneration processes in treating the 4-NP polluted real water. During 360 min of cyclic membrane catalysis, CuO@PEI/PDA-NWF caused the decrease of COD in Pearl River water with high concentration of 4-NP (20 ppm) up to ∼80%, indicating its high-efficiency and long-effectiveness. This study offers significant insights into developing novel cyclic membrane reactors with PMS activation for practically tricky wastewater treatment .
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高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Qingyun He,Chenhui Zhao,Lin Tang,Zhifeng Liu,Binbin Shao,Qinghua Liang,Ting Wu,Yuan Pan,Jiajia Wang,Yang Liu,Shehua Tong,Tianjue Hu
Social development is accompanied by technological progress, which commonly leads to the expansion of pollution As an essential resource of modern medical treatment, antibiotics have become a hot topic in the aspect of environmental pollution . In this study, we first used fish scales to synthesize N, P-codoped biochar catalyst (FS-BC) as peroxymonosulfate (PMS) and peroxydisulfate (PDS) activator to degrade tetracycline hydrochloride (TC). At the same time, peanut shell biochar (PS-BC) and coffee ground biochar (CG-BC) were prepared as reference materials. Among them, FS-BC exhibited the best catalytic performance due to the excellent defect structure (I D /I G = 1.225) and the synergism of N, P heteroatoms. PS-BC, FS-BC and CG-BC achieved degradation efficiencies of 86.26%, 99.71% and 84.41% for TC during PMS activation and 56.79%, 93.99% and 49.12% during PDS, respectively. In both FS-BC/PMS and FS-BC/PDS systems, non-free radical pathways involved singlet oxygen ( 1 O 2 ), surface-bound radicals mechanism and direct electron transfer mechanism. Structural defects, graphitic N and pyridinic N, P–C groups and positively charged sp 2 hybridized C adjacent to graphitic N were all critical active sites. FS-BC has the potential for practical applications and development because of its robust adaptation to pH and anions and stable re-usability. This study not only provides a reference for biochar selection, but also suggests a superior strategy for TC degradation in the environment.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Zihuan Wei,Lina Kong,Qiang Wang,Jianping Xu,Lan Li
Conjugated structure modification is an effective strategy for improving the photocatalytic activity of graphitic carbon nitride (g-C 3 N 4 ). Herein, we introduce p-π conjugated to g-C 3 N 4 by surface grafting of hydroxyl (-OH) groups through a facile hydrothermal process to improve the photo-carriers generation and separation. Experiments and DFT calculations indicate that the hydrothermal treatment decorated –OH groups onto the C sites of g-C 3 N 4 and formed p-π conjugated structure between the 2p orbitals of the O and the π orbitals of the tri-s-triazine unit. The extended p-π electrons delocalization of g-C 3 N 4 increases the concentration of the carriers, and the –OH groups serve as electrons transport channels facilitating the separation of the carriers. Consequently, –OH grafted g-C 3 N 4 with hydrothermal treated at 120 °C exhibits the highest and recyclable H 2 evolution rates of 2.3 mmol h −1 g −1 under simulated sunlight irradiation, which outperform pristine g-C 3 N 4 1.42 times. This work proposes a new mechanism of the p-π conjugate of –OH decorated g-C 3 N 4 for improving charge carriers formation and separation, and provides a mild strategy to engineer the other conjugated molecular structures.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Chanlin Fang,Liya Fang,Shanshan Di,Yundong Yu,Xinquan Wang,Caihong Wang,Yuanxiang Jin
N-(1,3-dimethylbutyl)- N ′-phenyl- p -phenylenediamine (6PPD) is a type of p -phenylenediamine (PPD), which is widely used in the manufacture of rubber tires owing to its excellent antiozonant properties. In this study, the developmental cardiotoxicity of 6PPD was evaluated in zebrafish larvae, and the LC50 was approximately 737 μg/L for the larvae at 96 h post fertilization (hpf). In the 6PPD treatment of 100 μg/L, the accumulation concentrations of 6PPD were up to 2658 ng/g in zebrafish larvae, and 6PPD induced significant oxidative stress and cell apoptosis in the early developmental stages of zebrafish. Transcriptome analysis showed that 6PPD exposure could potentially cause cardiotoxicity in larval zebrafish by affecting the transcription of the genes related to the calcium signal pathway and cardiac muscle contraction. The genes related to calcium signaling pathway ( slc8a2b , cacna1ab , cacna1da , and pln ) were verified by qRT-PCR, which were significantly downregulated in larval zebrafish after exposing to 100 μg/L of 6PPD. Simultaneously, the mRNA levels of the genes related to cardiac functions ( myl7 , sox9 , bmp10 , and myh71 ) also respond accordingly. H&E staining and heart morphology investigation indicated that cardiac malformation occurred in zebrafish larvae exposed to 100 μg/L of 6PPD. Furthermore, the phenotypic observation of transgenic Tg (myl7: EGFP) zebrafish also confirmed that 100 μg/L of 6PPD exposure could change the distance of atria and ventricles of the heart and inhibit some key genes ( cacnb3a , ATP2a1l , ryr1b ) related to cardiac function in larval zebrafish. These results revealed the toxic effects of 6PPD on the cardiac system of zebrafish larvae.
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PubMed
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Yu Liu,Rong Zheng,Huachen Lin,Pengjie Zhou,Yulong Ying,Longhua Li
P-doped multi-metal oxide is an effective method to improve its electrochemical energy storage performance. Herein, a novel P-doped ternary metal oxide (P-Ni 0.5 Cu 0.5 Co 2 O 4 ) with a yolk-shell hollow structure is reasonably prepared and used as electrode material for supercapacitors. The as-prepared electrode has significantly improved conductivity and capacity, with a high specific capacitance of 1570.2F g −1 in a three-electrode system. Furthermore, the as-assembled P-Ni 0.5 Cu 0.5 Co 2 O 4 //activated carbon supercapacitor possesses an ultra-high energy density of 118.6 W h kg −1 and stable cyclic performance.
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高影响因子
POLYMER INTERNATIONAL
·
2023
·Vol. 72
·期 8
·704-710
·
IF 3.2
Dong Wang,Pengxuan Zheng,Zhiwei Yu,Xiangwei Wang,Tingxi Li
Polymer electrolytes are being considered as an effective solution for electrochemical devices to replace currently used organic liquid electrolytes due to their excellent mechanical properties and security. Herein, we prepared stretchable polymer electrolytes (SPEs) doped with poly[(2-acrylamido-2-methylpropanesulfonic acid)- co -poly(ethylene glycol) dimethacrylate] (P(AMPS- co -PEGMA)) and enhanced with poly[(vinylidene fluoride)- co -hexafluoropropylene] (PVDF-HFP), through UV in situ polymerization. The SPEs showed good mechanical performance with an elongation of more than 40% and ionic conductivity reaching the order of 10 −3 S cm −1 . In terms of application, flexible electrochromic devices based on the UV in situ -prepared SPEs were assembled, the color switching performance being still good even after 400 switching cycles and 1000 bending cycles, which indicated that the SPEs could have excellent prospects in application for flexible devices. © 2023 Society of Industrial Chemistry.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Cuicui Su,Lingling Zhang,Yuanzheng Zhang,Xiaocheng Huang,Yumin Ye,Yu Xia,Zhiyi Gong,Xiaojuan Qin,Yichao Liu,Shishang Guo
In the background of air pollution and regular COVID-19 prevention, personal protective masks are necessary for our daily life. However, protective masks with high PM0.3 filtration usually have poor air permeability and are mostly disposable, leading to a heavy burden on the environment. In this work, a reusable membrane based on piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanofibers embedded with BaTiO3 nanoparticles (BTO NPs) was developed. The P(VDF-TrFE)/BTO composite nanofibers not only have enhanced piezoelectricity and surface polarity but also have reduced diameters that could be beneficial for electrostatic adhesion, pole–polar interactions, and mechanical sieving to increase the PM0.3 capture capacity. Moreover, the BTO NPs also improved the charge storage capacity of the composite membrane, which could further enhance the PM0.3 filtration efficiency after corona treatment. The piezoelectric mask based on P(VDF-TrFE)/BTO composite nanofibers has high filtration efficiencies of 96% for PM0.3 and 98% for bacteria, while the pressure drop was only 182 Pa, which is lower than the commercial N95 standard of 343.2 Pa. Furthermore, the piezoelectric mask has a long and stable filtration performance after 5 cycles of 75% alcohol disinfection, demonstrating that the P(VDF-TrFE)/BTO composite membrane has a potential application in personal protective masks with comfortable and reusable properties.
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高影响因子
危险品化学品经营许可证（带存储）