DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 29
·10203-10211
·
IF 4.174
Shaobin Li,Jing Pan,Fengbo Li,Li Zhang,Dongfeng Chai,Zhuanfang Zhang,Jianjiao Xin
A simple continuous hydrothermal method was used to synthesize a NiFe2O4@Ni–Mn LDH/NF composite. The layered structure provides a large void to transfer the electron effectively, and the composite materials exhibit remarkable electrochemical performance including excellent specific capacitance (1265 F g−1 at 1 A g−1) and remarkable cycling stability (the specific capacitance remains at 80.9% after 5000 cycles). In addition, the asymmetric supercapacitor exhibits a high energy density of 96.2 W h kg−1 at a power density of 700 W kg−1, and there is an extraordinarily good cycling stability with a capacity retention rate of 92.5% after 4000 cycles. The outcomes indicate that the NiFe2O4@Ni–Mn LDH/NF composite electrode has potential application as a high-performance supercapacitor.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL SCIENCES
·
2020
·Vol. 36
·期 10
·1157-1161
·
IF 2.049
Yu Wenjie,Li Hengye,Zhang Lin,Liu Jing,Kong Fenying,Wang Wei
In this study, efforts were made to prepare a porous aromatic framework (PAF) with build-in magnetic nanoparticles (Fe3O4-PAF) for use as an efficient adsorbent for the removal of organic pollutants from water. The Fe3O4-PAF showed good handleability and could be recovered easily by magnetic separation. As a proof of concept, the adsorption properties of Fe3O4-PAF were investigated to remove 2,4-dichlorophenol (2,4-DCP) and bisphenol A (BPA) from water. The Fe3O4- PAF showed a fast adsorption rate, high adsorption efficiency and high adsorption capacities. It adsorbed 2,4-DCP (0.1 mmol L −1 ) and BPA (0.1 mmol L −1 ) with pseudo-second-order rate constant (k2) of 2.1 and 3.54 g mg −1 min −1 , respectively. According to the Langmuir isotherm model, the maximum adsorption capacities of 2,4-DCP and BPA onto Fe3O4-PAF were calculated to be 234.74 and 233.65 mg g −1 , respectively. The Fe3O4-PAF also featured good tolerance to harsh conditions, facilitating its application in a real water environment. It could be regenerated easily and reused multiple times without obvious loss of efficiency. In summary, this study provides a general and effective way to improve the handleability of PAFs and expands the practical application of PAF-based materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 16
·9299-9308
·
IF 3.119
Chaojing Yan,Mengyuan Jin,Xinxin Pan,Longli Ma,Xiaohua Ma
A simple polymerization process assisted with UV light for preparing a novel flexible polyelectrolyte-based gel polymer electrolyte (PGPE) is reported. Due to the existence of charged groups in the polyelectrolyte matrix, the PGPE exhibits favorable mechanical strength and excellent ionic conductivity (66.8 mS cm−1 at 25 °C). In addition, the all-solid-state supercapacitor fabricated with a PGPE membrane and activated carbon electrodes shows outstanding electrochemical performance. The specific capacitance of the PGPE supercapacitor is 64.92 F g−1 at 1 A g−1, and the device shows a maximum energy density of 13.26 W h kg−1 and a maximum power density of 2.26 kW kg−1. After 10 000 cycles at a current density of 2 A g−1, the all-solid-state supercapacitor with PGPE reveals a capacitance retention of 94.63%. Furthermore, the specific capacitance and charge–discharge behaviors of the flexible PGPE device hardly change with the bending states.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2020
·
IF 7.098
Danping Li,Xun-An Ning,Chenghai Yang,Xiaohui Chen,Yi Wang
Core-shell nanoparticles were prepared by coating magnetic nanoballs (Fe3O4) with highly cross-linked polymer poly(-cyclotriphosphazene-co-4,4′-sulfonyldiphenol) (PZS) to serve as heteroatomic-rich doping electrodes (MZPS). After formation by carbonization , C-MPZS acts like a flowing electrode used for flow-capacitive deionization (FCDI), which has fast ion transfer and diffusion performances because of its rich heteroatom content and the prominent synergistic effect of N, P, S atoms. Moreover, the FCDI performance of C-MPZS is enhanced due to its increased synergistic effect from its excellent available specific surface area, unique porous characteristics with large micro-/mesopores, and favorable conductivity with high graphitization . The optimal carbonization temperature was 500 °C with an optimum specific capacitance of 211.54 F g −1 , which was tested in a 1 M sodium chloride solution at a scan rate of 1 mV s −1 . Then, the C-MPZS flowing electrode was found to have a high electrosorption capacity (50.07 mg g −1 ), removal efficiency (68.50%) and removal rate (83.07%) at an applied potential of 1.0 V in a sodium chloride solution with a conductivity of 1200 μS cm −1 at 6 rpm. An additional cyclic test demonstrated good stability performance after 10 cycles due to the magnetic nanoparticles effect. Finally, through the successful application in tail water from printing and dyeing wastewater, the results indicated that the as-prepared C-MPZS flowing electrode has promise for application in high-performance electrochemical deionization.
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Kaijie Yang,Tingting Pan,Qiang Zhao,Cheng Chen,Xiaoying Zhu,Peng Wang,Baoliang Chen
Activated carbon (AC) particles, as some of the most widely used sorbents , have an indispensable position in environmental remediation. Although AC surface adsorption was extensively investigated, its internal nanostructure has not been well elucidated. Exploitation of the internal nanostructure for pollution abatement is worthwhile pursuing to expand AC application field. Herein, the internal nanostructures of AC particle are revealed by step-by-step exfoliation and characterization, indicating that an AC particle is composed of multilevel nanostructures including carbon nanospheres and graphene-like layers to a certain extent. AC particles can be transformed into an ultrafiltration membrane through a newly developped structure exfoliation and reconstruction processes under surface regulation without additional cross-linkers. The pure AC membrane (ACM) preserves the adsorption capacity of AC particles, and further endows AC with the function of membrane separation . The ACM shows excellent stability, strong adsorption capacity (252.4 mg/g for methylene blue), narrow sieving pores distribution (5–10 nm), low-fouling property for cycling use. The considerable water flux is 12–27 times higher than commercial ultrafiltration membrane. Dual-function performances of adsorption and separation make the ACM high potential in water purification . This approach for particle-to-membrane transformation provides a new perspective for AC particle future utilization.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Dan Liu,Bing-Bing Lu,Wen-Yuan Pei,Zhen-Yi Gu,Jin Yang,Xing-Long Wu,Jian-Fang Ma
The development of new and efficient anode materials for lithium-ion batteries (LIBs) has attracted considerable attention. Herein, a new polyoxometalate-based metal-organic framework (POMOF), [Mn 4 (L)(SiW 12 O 40 )·(DMF) 2 ·(H 2 O) 6 ]·4OH·4DMF·7H 2 O ( 1 ), was prepared with a resorcin [4]arene-based ligand (L), Keggin-type [SiW 12 O 40 ] 4- anion and Mn(II) cation (DMF = N,N′ -dimethylformamide). Compound 1 has a layer structure sandwiched by [SiW 12 O 40 ] 4- anions. The high specific capacity and excellent cycling stability are achieved by using 1 as an anode material for LIBs. The high electrochemical performance of compound 1 is attributed to the good electron storage and reversible multi-electron redox properties of [SiW 12 O 40 ] 4- anions within the framework.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Zidong Wang,Zhe Chu,Chunwei Dong,Ze Wang,Shiyu Yao,Hang Gao,Zhaoyu Liu,Yi Liu,Bai Yang,Hao Zhang
As a family of semiconductor photocatalysts, Sillén-type bismuth oxyhalides (BiOX, X = Cl, Br, I) have attracted widespread interest due to their excellent photocatalytic activity and photoconductivity. However, most current strategies on synthesizing ultrathin 2D BiOX nanosheets (NSs) rely on high temperature and pressure and complex procedures, which seriously confine their large-scale applications. Herein, we develop a simple and facile two-phase method for the synthesis of ultrathin 2D BiOX NSs with highly exposed {001} facets. On the basis of systematically studying the effects of various reaction parameters on the size, thickness, morphology, and composition of the products, the growth mechanism of ultrathin 2D BiOX NSs is presented, which indicates that the suppression of Bi3+ hydrolysis is required for the growth of 2D BiOX NSs with highly exposed {001} facets. The acidic condition prefers the growth of BiOX NSs with ultrathin structure and high crystallinity along the [001] zone axis. By using BiOBr NSs as the example, the photocatalytic activities of ultrathin 2D BiOX NSs are evaluated upon photodegradation of organic compounds and photocatalytic water oxidation. The results show that the organic compound photodegradation is mainly determined by the specific surface area of BiOBr NSs, while the O2 evolution rate of BiOBr NSs for water oxidation is dependent on their photogenerated charge separation efficiency. Because of the larger specific surface area and higher photogenerated charge separation efficiency, BiOBr-acid-0.5 ultrathin 2D NSs exhibits the fastest organic compound photodegradation rate and O2 evolution rate of 445.6 μmol g–1 h–1.
✓ 已验证
产品关联
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Shuhan Li,Zhiyuan He,Yang Li,Ke Liu,Mengwei Chen,Yingping Yang,Xiangyou Li
In this study, anti-solvent carbon quantum dots (ASCQDs), generated via pulsed laser irradiation in chlorobenzene (CB), were adopted as an additive for defect passivation of the grain boundaries of CH 3 NH 3 PbI 3 in hole-conductor-free, carbon-counter-electrode perovskite solar cells (PSCs). The size of the ASCQDs can be easily regulated by different laser fluence. The improvement of perovskite films’ morphology was revealed by scanning electron microscopy (SEM) and atomic force microscopy (AFM), which was beneficial for carrier transport. Higher photoluminescence (PL) intensity as well as prolonged carrier lifetime were proved in the ASCQDs optimized perovskite film, confirmed the laser induced ASCQDs can decrease nonradiative recombination via defect passivation, which can be further verified by the decreased defect density . As a result, the introduction of ASCQDs (1064 nm-50 mJ pulse −1 cm −1 -10 min) led to a champion efficiency of 14.95%, which improved 14.04% when compared with pure CB treated PSCs (13.11%). Furthermore, the ASCQDs treated PSCs can still retain 93% and 81% of the initial power conversion efficiency after 600 h in the glovebox and in the atmosphere with humidity of 50–70%, respectively.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 4
·51549
·
IF 3.125
Zhongwen Wang,Yamin Deng,Xin Jia
Poly- p -phenyleneterephthalamide (PPTA) is widely used in national defense, military industry, and aerospace. However, with weak compression resistance and twist resistance, development of PPTA is greatly impeded. In this work, a novel rigid rod polymer was synthesized by polycondensation of 2,6-dihydroxyterephthalic acid with 2,3,5,6-tetraminopyridine which have a large quantity of hydrogen bonds between these polymer chains which provide excellent thermal properties named poly [N-(2,5-diamino-6-[imino]-3-pyridyl)-4-formyl-2,6-dihydroxybenzamide] (PPDA). The structure of the polymers was characterized by X-ray diffraction and Fourier transform infrared spectroscopy. The resulting showed that PPDA has good thermal stability and crystallinity, the maximum thermal decomposition temperature close to 900°C under the nitrogen atmosphere. At the same time, PPDA was insoluble in most organic solvents and exhibited good chemical stability. This indicated a superior performance over that of the poly(2,6-diimidazo(4,5-b:4′5′-e)pyridinylene-1,4(2,5-dihydroxy)phenylene). In addition, we can foresee that PPDA will play an important role in prospective surgery and aramid areas.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 40
·24995-25003
·
IF 3.361
Hao Guo,Longli Ma,Chaojing Yan,Xiaohua Ma
The polycation gel polymer electrolyte (PGPE) is a promising electrolyte material for supercapacitors due to its high ionic conductivity and great flexibility. Herein, we report a novel flexible PGPE film, which is prepared by thermal copolymerization. The superiority of PGPE is attributed to the existence of charged groups in the polymer skeleton. Consequently, the crystallinity of the polymer is effectively reduced, and the migration of the lithium ion is evidently promoted. Moreover, the liquid retention capacity of the film is improved, which enhances its ionic conductivity as well. The reported PGPE exhibits a high ionic conductivity of 57.6 mS cm−1 at 25 °C and a potential window of 0–1.2 V. The symmetrical PGPE supercapacitor (AC/AC) shows 95.21% mass-specific capacitance retention after 5000 cycles at 2 A g−1 with a maximum energy density of 12.8 W h kg−1 and a maximum power density of 5.475 kW kg−1. This study confirms the exciting potential of PGPE for high performance supercapacitors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Mingyang Zhou,Qian Zhou,Qianyuan Qiu,Wei Wang,Jiang Liu
A completely sealed high temperature carbon-air battery is proposed and prepared using a tubular oxygen-ion-conducting yttrium stabilized zirconia electrolyte with anode inside and cathode outside. CaO and carbon powders, with a molar ratio of 0.5, 0.75, and 1.0, are respectively loaded in the anode chamber , in two ways: One is mixing CaO and C together (mixing mode) and the other is loading them one by one (separating mode). The electrochemical output performance and discharging time of the batteries increase with decreasing CaO/C ratio. Thermodynamic calculation results show that the pressure of the anode chamber of a battery increases with more carbon oxidized. CO 2 produced through the electrochemical oxidation of carbon can be absorbed by CaO to produce CaCO 3 , resulting in relieve of pressure. However, insufficient CO 2 for maintaining the operation of battery is also caused by CaO. This evidence may be mitigated by loading C and CaO separately to avoid immediate reaction between CO 2 and CaO. A carbon-air battery with 0.25 g carbon powder separately loaded with CaO in a CaO/C ratio of 0.5 discharges at 200 mA for 6.9 h, giving a practical specific energy density of 1300 Wh kg −1 , considering the mass of both C and CaO.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2021
·Vol. 86
·期 10
·4393-4404
·
IF 3.167
Xin Wang,Zhijun Zhang,Huizhen Li,Tianyu Hou,Yana Zhao,He Li
Perilla seed oil (PSO) has a special aromatic odor, which is unpleasant to the personal preferences of some consumers. To this end, this article evaluated the differences in volatile organic compounds (VOCs), physicochemical characteristics, and fatty acid composition of PSO treated with ethanol (PSO-EA), activated carbon (PSO-AC), and activated kaolin (PSO-AK). The results showed that in the PSO, PSO-EA, PSO-AC, and PSO-AK samples, the content of linolenic acid, oleic acid, and linoleic acid hardly changed. Among the physicochemical characteristics of the four samples, the color difference between PSO and PSO-EA was greater than the color difference between PSO and PSO-AC, PSO-AK. The three treatment methods had the greatest impact on the PSO peroxide value but had little effect on other indicators. Gas chromatography–ion mobility spectrum results identified 28 known volatiles, of which aldehydes, alkenals, alcohols, ketones, and esters were the main groups. Fingerprint analysis found that PSO had an aromatic odor, which includes 1-hexanol, hexanal, and 2-pentylfuran; the removal effect of ethanol on VOCs in PSO was better than that of activated carbon and activated kaolin. The difference between the four oil samples was found from the strength of the VOCs’ signals in a two-dimensional map. From the principal components analysis and the “nearest neighbor” fingerprint analysis, it was found that PSO is generally quite different from PSO-EA, PSO-AC, and PSO-AK, while in the “nearest neighbor” fingerprint analysis, PSO-AC and PSO-AK are similar in general. In short, PSO will have better applications in the food field. Practical Application Treatment of PSO with ethanol, activated carbon, and activated kaolin is conducive to the comprehensive utilization of edible resources. In this work, ethanol, activated carbon, and activated kaolin were used to remove VOCs in PSO, and PSO-EA, PSO-AC, and PSO-AK were obtained. The perilla seed oil after these three treatment methods was tested for VOCs, physicochemical characteristics, and fatty acid composition. They can meet the needs of more consumers without affecting the fatty acid composition in the PSO, and have broad development prospects.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）