DESALINATION
·
2012
·
IF 2.59
Lei Ling,Yuming Zhou,Jingyi Huang,Qingzhao Yao,Guangqing Liu,Peixin Zhang,Wei Sun,Wendao Wu
In an attempt to control Ca 3 (PO 4 ) 2 , CaCO 3 , and CaSO 4 deposits in industrial recycling water systems, an acrylic acid (AA)-allyloxy poly(ethylene glycol) polyglycerol carboxylate (APEG-PG-COOH) copolymer was synthesized as a nonphosphorus inhibitor. The synthesized polymer was characterized by 1 H NMR. The performance of PAA/APEG-PG-COOH on inhibition of Ca 3 (PO 4 ) 2 , CaCO 3 and CaSO 4 precipitation was studied through static scale inhibition tests. It was shown that PAA/APEG-PG-COOH exhibited excellent ability to control inorganic minerals, with approximately 100% CaSO 4 inhibition and 99.89% Ca 3 (PO 4 ) 2 inhibition at levels of 3 and 6 mg/L PAA/APEG-PG-COOH, respectively. PAA/APEG-PG-COOH also displayed ability to prevent the formation of CaCO 3 scales. The effects on formation of Ca 3 (PO 4 ) 2 , CaCO 3 and CaSO 4 were investigated with combination of Scanning electronic microscopy (SEM), Transmission electron microscopy (TEM), and X-ray powder diffraction (XRD) analysis, respectively.
研究领域:
环境化学
·
材料科学
·
工业水处理
·
高分子化学
·
腐蚀与防护
·
矿物结垢控制
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Yuanyuan Ma,Zhongling Lang,Jing Du,Likai Yan,Yonghui Wang,Huaqiao Tan,Shifa Ullah Khan,Yang Liu,Zhenhui Kang,Yangguang Li
Selective reduction of nitroarenes is extremely valuable in industrial chemical production. The main reduced products are usually aniline derivatives obtained using single-component noble- or transition-metal catalysts; however, other important products such as hydrazobenzene derivatives always involve in harsh conditions and multiple reaction steps. Here, we realize an unexpected switchable reduction of nitroarenes into aniline or hydrazobenzene derivatives with high yield and selectivity just by controlling the molar ratio of nitroarenes to N 2 H 4 ·H 2 O with a nickel–tungsten carbide composite nanocatalyst loaded on carbon (Ni-WC/C). A series of control experiments and density functional theory (DFT) calculations indicate that the multiple interfaces between Ni and WC can induce a synergistic effect, significantly modulating the electronic structure of the Ni-WC/C catalyst, and endowing the catalyst with switchable selectivity and high activity for the reduction of nitroarenes by hydrogenation. This synergistic multi-interfacial catalyst may offer a new way to design and explore highly efficient and selective catalysts for the controllable reduction of nitroarenes and similar hydrogenation reactions.
研究领域:
催化化学
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有机合成
·
纳米材料
·
表面科学
·
工业化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zuocheng Luo,Qingfeng Zhang,Wei Xie,Tong Yuan,Qisheng Zang,Ning Wang,Hanxiao Fan,Shuhong Xie,Xiaoping Ouyang
Potassium ion hybrid capacitors (PIHCs) have attracted widespread attention as combining the advantages of potassium ion batteries (PIBs) with supercapacitors . However, the sluggish kinetics caused by the large radius of K + hinder the practical application of PIHCs. Herein, we synthesized a boron and fluorine co-doping interlaced network porous carbon nanofibers (BF-PCNFs), which was used as the freestanding anode of PIHCs the freestanding anode of PIHCs to alleviate large volume expansion and increase conductivity. Benefiting from the B, F co-doping and porous interlace nanostructure of BF-PCNFs, the anode shows 185 mA h g −1 under a load of 12.6 mg cm −2 , a reversible capacity of 176 mA h g −1 at 1000 mA g −1 after 6000 cycles, and the capacity retention from 100 mA g −1 to 5000 mA g −1 is 62%. Furthermore, the PIHCs based on BF-PCNFs as anode and activated carbon as cathode exhibit an energy density of 87 Wh kg −1 and a power density of 393 W kg −1 . The capacity retention is as high as 78% over 4000 cycles. Considering the exceptional rate performance, long cyclability and high-mass-loading, our work may supply a new strategy for designing novel energy storage devices with outstanding performance.
研究领域:
材料科学
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电化学
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能源存储
·
纳米科技
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功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 7
·
IF 1.64
Pan Dongdong,Tian Hengshui
Soluble and thermally stable polycarbonate polyurethane elastomers were synthesized through a solvent-free and nonisocyanate melt transesterification process. The conditions of this process were studied, and the optimum conditions were as follows: the catalyst dibutyltin oxide dosage was 0.125 wt %, the raw material molar ( n ) ratio of dimethyl 1,6-hexamethylene dicarbamate (HDC) to poly(carbonate macrodiol) (PCDL) was n (HDC)/ n (PCDL) = 1:0.99, the reactants were prepolymerized under 100°C for 1 h and then under 185°C and a high vacuum for 4 h. Three different PCDLs were selected to participate in the reaction under the conditions mentioned previously, and their structures were characterized by Fourier transform infrared spectroscopy and X-ray diffraction. The products obtained from this process were still stable under 280°C. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41377.
研究领域:
高分子化学
·
生物材料
·
聚合物科学
·
材料化学
·
医用高分子
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 60
·48946-48953
·
IF 3.84
Tingting Yu,Lifen Liu,Qiao Yang,Jing Song,Fenglin Yang
Using the flat module membrane electrodes based on polyester filter modified with polyaniline (PANI)–phytic acid (PA), a new type of membrane bio-reactor (MBR) system is developed for both bio-electrochemical electricity generation and effluent filtration. A specifically prepared carbon foam–Fe–Co catalyst was coated on the conductive, filterable cathode membrane which makes it catalytic for enhancing cathodic oxygen reduction reaction and electricity generation. The cell voltage (with carbon foam–Fe–Co, 0.5–0.4 V) is superior to control test 1 (without any catalyst, 0.2 V), moreover, it is even better than control test 2 (with Pt–C catalyst, 0.5–0.3 V). The corresponding maximum power density of carbon foam–Fe–Co is 38.5 and 2.4 times higher than control test 1 and 2, respectively. More importantly, the base electrode materials and catalyst were both low-cost. The overall removal efficiency of COD and NH4+–N are satisfactory, at 95% ± 2.5% and 85% ± 2.5%, respectively. This integrated system is easy to scale up for practical application in waste-water treatment and offers a better option in operating and coupling MBR with bio-electricity generation.
研究领域:
环境工程
·
环境微生物学
·
电化学工程
·
水处理技术
·
生物电化学系统
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 30
·期 2
·749-757
·
IF 2.8
Cong Jun,Luo Shao-hua,Li Peng-yu,Li Kun,Wang Ya-feng,Yan Sheng-xue,Li Peng-wei,Chen Huan-huan
To realize the high value–added utilization of acid-washed iron red, in this paper, acid-washed iron red is used as raw material. Aiming at the problem of low conductivity of iron-based lithium ion batteries (LIBs) LiFePO 4 /C materials, different metal ions are doped in the iron position, and the microstructure and electrochemical properties of the obtained material are systematically studied. Here, LiFePO 4 /C is synthesized through simple carbothermal reduction method using acid-washed iron red as the iron source. On this basis, La (1%, 2%, 3%) doping modification is carried out. Then doped modification is performed on this basis, preferably 2% La-doped LiFePO 4 /C materials. The XRD patterns show that the diffraction peaks of the samples prepared at all doping amounts can be perfectly matched with the standard card ( PDF # 40–1499), and there is no impurity peak, all of which are pure phases. According to the refined data, it is clear that minor amount of La has successfully replaced the position of Fe and incorporated into the lattice. Electrochemical tests show that LiFe 0.98 La 0.02 PO 4 /C has the highest charge and discharge capacity of 146.5/138.2 mAh·g −1 in the first cycle at 0.5C, and the reversible specific capacity of 136.5 mAh·g −1 remains after 50 cycles. Furthermore, the first-principles calculations more strongly confirm that La doping can significantly improve the defects of low electronic conductivity of LiFePO 4 .
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
固态化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Dandi Zhou,Min Wang,Jing Dong,Shiyun Ai
The rapid and sensitive detecting technique for subgroup J of avian leukosis viruses (ALVs-J) needs to be developed as soon as possible in order to not only reduce economic losses but also ensure the food safety. In this paper, a novel electrochemical immunosensor was built based on mesoporous graphitic carbon nitride (mpg-C 3 N 4 ). Mpg-C 3 N 4 was used as the sensor platform to bond with the primary antibodies (Ab 1 ). The compound of thionine and mpg-C 3 N 4 (Th-mpg-C 3 N 4 ) was synthesized for the first time to serve as the electroactive probe as well as the carrier of secondary antibodies (Ab 2 ). Compared to bulk g-C 3 N 4 , mpg-C 3 N 4 possesses larger specific surface area, smaller electrochemical resistance and abundant active sites. So the proposed electrochemical immunosensor exhibited amplified detective signals which realized the sensitive detection of ALVs-J. Under the opitimized conditions, the immunosensor exhibited outstanding analytical performance for the detection of ALVs-J whose titer ranged from 10 2.08 to 10 4.0 TCID 50 /mL (TCID 50 : 50% tissue culture infective dose) with a low detection limit of 120 TCID 50 /mL (S/N = 3). The sensitivity of the immnosensor was 6.15 μA/(TCID 50 /mL). This high sensitive immunosensor also displayed good selectivity, reproducibility and stability. Last but not least, this new strategy may be of great promise for clinic application in the future.
研究领域:
生物医学工程
·
免疫学
·
病毒学
·
分析化学
·
纳米生物技术
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2015
·Vol. 9
·期 7
·2026-2035
·
IF 1.956
Du Jiaojiao,Gao Ruixia,Mu Hui
Phthalates represent a potential risk for humans, since they are ubiquitous environmental contaminants. Efficient extraction and purification procedures are demanded for the detection of low concentration levels of phthalates. In this work, a novel type of molecularly imprinted polymers coated onto the surface of vinyl functionalized multi-walled carbon nanotubes was synthesized and coupled with gas chromatography–mass spectrometry (GC/MS) for the selective separation and determination of dioctyl phthalate (DOP) in beverage samples. The morphology, structure property, and thermostability of the resultant polymers were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The adsorption properties of the prepared polymers were investigated by equilibrium rebinding and competitive experiments. The resultant imprinted nanomaterials exhibited high capacity and favorable selectivity. In addition, the feasibility of the developed method using the obtained imprinted polymers as a solid-phase sorbent coupled with GC/MS for the selective isolation and determination of DOP in different beverage samples was demonstrated. Under optimal conditions, the limit of detection of the proposed method for DOP was 2.3 ng L −1 . DOP spiked at three levels of concentration in beverage samples was extracted and determined through the application of the present method, with recoveries ranging from 88.6 to 93.0 % with relative standard deviations less than 5.6 %.
研究领域:
分析化学
·
环境毒理学
·
食品安全
·
分子识别
·
材料科学
·
色谱分析
✓ 已验证
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 43
·2004614
·
IF 11.459
Xian Wang,Anrui Dong,Ziyi Zhu,Lulu Chai,Junyang Ding,Li Zhong,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
In the preparation of nanomaterials, the kinetics and thermodynamics in the reaction can significantly affect the structures and phases of nanocrystals. Therefore, people are keen to adopt various synthetic strategies to accurately assemble the target nanocrystals, and reveal the underlying mechanism of the formation of specific structures. In this work, the total reaction time is adjusted to let the prepared MnCo Prussian blue analogous (MnCoPBA) crystals show four evolving morphological changes at different stages with the assistance of sodium dodecyl sulfate. Furthermore, it is clearly observed that the epitaxial growth along the (100) plane on the shell of MnCoPBA nanocrystals is favored, and the thermodynamics and kinetics in the morphology change process are analyzed in detail. Through the simple pyrolysis, MnCoPBA crystals can be successfully converted into the corresponding carbon composites, of which Mn 2 Co 2 C nanoparticles are evenly distributed in highly graphitized carbon matrix. Among them, PBA-III-700 performs good oxygen reduction reaction performance in alkaline solution with the half-wave potential of 0.801 V and diffusion-limited current density of 5.36 mA cm −2 , and its zinc-air battery exhibits the peak power density of 103.4 mW cm −2 competitive with commercial Pt/C.
研究领域:
材料化学
·
纳米科学与技术
·
电化学
·
能源材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
SOLID STATE COMMUNICATIONS
·
2021
·
IF 1.804
Shaohui Su,Jiahao Yu,Xianguo Liu,Jieyi Yu
Magnetic-dielectric composites attract numerous attentions for good microwave absorption performances based on magnetic-dielectric loss mechanism and tunable electromagnetic parameters. Fe/carbon fibers are prepared through carbonization of Fe doped polyaniline nanotubes , in which Fe nanoparticles are embedded in carbon fibers. The introduction of Fe nanoparticles results in good electromagnetic impedance and proper quarter-wavelength cancellation induced, which ensure that microwave penetrate composites to the great extend and is consumed as much as possible, leading to enhanced microwave absorption performance. The minimal reflection loss of Fe/carbon fibers composites starts being less than −10 dB from 1.7 mm and is up to −44.09 dB at 6.62 GHz and 4.1 mm and the effective bandwidth reaches 6.0 GHz with 2.4 mm.
研究领域:
材料科学
·
电磁学
·
纳米复合材料
·
功能材料
·
微波工程
✓ 已验证
DOI
高影响因子
POLYMER TESTING
·
2020
·
IF 3.275
Rui Wang,Congzhen Xie,Bin Gou,Huasong Xu,Shoukang Luo,Jiangang Zhou,Leilei Zeng
Dielectric polymers with high thermal conductivity are very promising in the fields of aerospace and electronic device packaging. However, composites with excellent dielectric properties usually have low thermal conductivity. It is usually to fill the polymer with thermal conductivity particles to improve the thermal conductivity, but the high content of filler often reduces the mechanical properties of the polymer. In this paper, the traditional insulating polymer epoxy resin was used as the matrix, by covering the surface of silicon carbide with graphene to form a core-shell structure and co-filled with nano diamonds to achieve the preparation of high-performance epoxy resin at low content. The results showed that at the filling content of 30 wt%, the thermal conductivity of epoxy nanocomposites showed a dramatic thermal conductivity enhancement of 1263%, the energy storage modulus increased by 1.1 GPa, and the dielectric loss remained unchanged at 50 Hz. The advantages of the composite are the structural design and surface modification of the filler, which not only take advantage of its inherent advantages, but also improve the interface area with the epoxy matrix. The composite materials with excellent properties are expected to provide theoretical guidance for the application of high thermal conductivity dielectric materials.
研究领域:
材料科学
·
高分子化学
·
复合材料工程
·
电子封装材料
·
介电材料
·
热管理材料
✓ 已验证
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Wenjing Lai,Jiajia Li,Mingzhe Jiang,Chaoyun Ma,Chulei Zhao,Min Wang,Pengli Li,Shijie Yan,Yu Qi,Chenglin Hong
In electrochemical immunoassays, great breakthroughs have been made in ultrasensitive detection of tumor markers by amplifying signals with coreaction accelerators. Herein, carbon nitrides with nitrogen vacancies (CNNVs) are proposed as emitter, due to the introduction of nitrogen vacancies this emitter has better ECL efficiency, the phenomena of interface electron transfer and electrode passivation are improved. At the same time, it can also promote the electrochemical reduction of coreactant, making it an attractive and potential emitter. The electrode was modified with Ag-Ti 3 C 2 MXene. It not only accelerates electron transfer and increases the effective working area of the electrode, but also acts as a coreaction accelerator to promote the electrochemical reduction of the coreactant K 2 S 2 O 8 , resulting in a strong ECL signal. The immunosensor showed a good linear relationship in the range of 10 −5 -100 ng/mL with a detection limit of 0.36 fg/mL. In addition, the excellent properties of good specificity and ultra-high stability provide an effective method for ultra-sensitive immunoassays.
研究领域:
生物分析化学
·
肿瘤学
·
免疫学
·
纳米生物技术
·
分子诊断
·
转化医学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）