ACS Sustainable Chemistry & Engineering
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2019
·
IF 6.97
Jie Di,Junxia Guo,Nannan Wang,Guiping Ma
In this work, unique sugar-coated haws stick-like core–shell ZIF-67@PAN-HCCP-MIM-FeCl3 nanofibers were successfully prepared by electrospinning and an in situ nanocrystal growth process. After carbonization of the as-synthesized nanofibers at various temperatures, the resulting sample Fe/Co-N/P-9 (carbonized at 900 °C) retained the presented a sugar-coated haws stick-like structure. The internal carbon nanofiber acts like a “stick” as a support, the “haws” composed of Co2P and Fe5C2 nanoparticles act as catalytic active sites, and the graphite carbon acts as “sugar” to protect particles from detachment. The channel gap between inner core and outer layer can improve the mass transfer process. Owing to these special structure and unique composition features, Fe/Co-N/P-9 exhibited excellent oxygen reduction reaction (ORR) performance with an onset potential of 0.96 V (vs RHE) and a half wave potential of 0.85 V (vs RHE) in 0.1 M KOH solution. Fe/Co-N/P-9 also showed good catalytic stability and methanol tolerance. In addition, the rechargeable Zn–air battery fabricated by Fe/Co-N/P-9 exhibited a galvanostatic discharge voltage of 1.25 V, a higher specific capacity of 565 mAh/gZn, and a better cycle stability than Pt/C+RuO2.
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高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 11
·6849-6859
·
IF 3.917
Wang Aili,Li Shuhui,Chen Hou,Hu Yanping,Peng Xiong
Abstract The adsorption of heavy metal ion Zn(II) from industrial wastewater by performing environmentally benign methods is particularly important. In this study, a novel microcrystalline cellulose-based polymeric bio-sorbent (MCC- g -polyIL), which contained specific poly(ionic liquid) structure and adsorption performance for Zn(II), was in situ ARGET ATRP-synthesized within ionic liquid microemulsions. The ionic liquid microemulsions were characterized by phase formation capacity and dynamic light scattering results, and the prepared MCC- g -polyILs were characterized by FTIR, 1 HNMR, and TG/DSC analyses. The optimization of the adsorption process indicates that both the molar ratio of double ionic liquids and the dosage of the adsorbent affected the adsorption capacity of MCC- g -polyILs toward Zn(II).
The research on adsorption kinetics and adsorption isotherms further reveals that the adsorption process follows the pseudo-second-order kinetic model and the Freundlich adsorption isotherm model. The designed MCC- g -polyILs exhibited enhanced adsorption capacity, which indicates promising practical applications for the removal of Zn(II) from industrial wastewater.
Graphic abstract
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 39
·22453-22462
·
IF 10.733
Liang Yan,Bing Zhang,Junlu Zhu,Zhonggang Liu,Haiyan Zhang,Yunyong Li
Exploring highly efficient and cost-effective electrocatalysts has become imperative for neutral-pH water splitting, which is environmentally friendly and can reduce the cost of electrolysis systems. Here, we report an effective strategy to design a novel type of callistemon-like Zn and S codoped CoP nanorod clusters by introducing both Zn and S into cobalt phosphide, thereby creating electrocatalysts for highly efficient and stable neutral water splitting. The best Zn and S codoped CoP nanorod clusters on carbon paper (Zn,S–CoP NRCs/CP) require overpotential values of 67 and 391 mV for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at 10 mA cm−2 in 1.0 M phosphate-buffered solution, respectively. Remarkably, this enables a neutral electrolyzer to deliver 10 mA cm−2 at a low cell voltage of 1.70 V, which is superior to those afforded by the Pt/C/CP‖IrO2/CP couple and most of the state-of-the-art electrocatalysts. Impressively, this electrolyzer can be powered by an AA battery (∼1.5 V). Density functional theory computations and systematic experiments have verified that the improved HER and OER activities originate from the optimized electronic structures that can facilitate the adsorption and desorption of hydrogen intermediates after introducing Zn and S and accelerating the formation of oxygenated intermediates on CoOOH, respectively. This work provides a new strategy to boost the performance of transition metal phosphides for neutral water or seawater splitting.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Junxia Guo,Binling Chen,Qian Hao,Jun Nie,Guiping Ma
In this report, novel pod-like nitrogen-doped carbon fibers encapsulated with cobalt/cobalt oxide nanoparticles (Co/CoO x -N-C) were prepared by a facile method. Co/CoO x -N-C can be readily obtained from the carbonization of electrospun ZIF-67@PAN fiber. Both effects of ZIF-67 crystal size and pyrolysis temperature on the ORR were investigated. The optimal Co/CoO x -N-C-l, which has an average ZIF-67 size of 370 nm and a carbonization temperature of 800 °C, presents features of 1D hierarchical porosity pod-like structure, dispersion of nanoparticles, high content of N dopant, and high degree of graphitization, resulting in an excellent ORR performance. Co/CoO x -N-C-l presents an onset potential of −0.07 V (vs Ag/AgCl), a half-wave potential of −0.144 V, and a diffusion limited current density at 0.6 V of 4.9 mA/cm 2 . The relative current of Co/CoO x -N-C-l (90.1%) is much higher than that of the 20 wt% Pt/C (79.8%) after a 36,000 s of continuous operation. In addition, Co/CoO x -N-C-l was further applied as a cathode catalyst of the Zn-air battery. It exhibited an outstanding discharge specific capacity (610 mAh/g) and a comparable discharge voltage to that of 20 wt% Pt/C and RuO 2 . This study may provide a novel strategy to generate pod-like structured nanocomposites for energy devices.
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高影响因子
Advanced Optical Materials
·
2018
·Vol. 6
·期 10
·1701389
·
IF 7.43
Zhongyuan Guan,Aiwei Tang,Peiwen Lv,Zhenyang Liu,Xu Li,Zhan'ao Tan,Tasawar Hayat,Ahmed Alsaedi,Chunhe Yang,Feng Teng
A series of multinary Cu-In-Zn-Se-S nanocrystals (NCs) are synthesized via a phosphine-free and one-pot approach, in which the Se powder and 1-dodecanethiol (DDT) are used as chalcogenide sources, respectively. The X-ray photoelectron spectra are used to confirm the presence of lattice sulfur in the as-obtained products. The emission color and the relative photoluminescence quantum yields of the Cu-In-Zn-Se-S NCs can be tuned by varying the Cu contents, the amount of Se powder, as well as the DDT dosage. In addition, the formation process of the multinary Cu-In-Zn-Se-S NCs is different from that of quaternary Cu-In-Zn-S NCs, which is dominated by the doping of Cu ions into the In-deficient In-Zn-Se-S NCs but not the partial interdiffusion of Zn 2+ into the Cu-based NCs. This plausible deduction is based on the comparison of optical properties of the products synthesized using the hot-injection and one-pot methods. Furthermore, the performance of the solution-processed quantum-dot light-emitting diodes (QLEDs) using the Cu-In-Zn-Se-S NCs as emission layers is examined, and the QLEDs exhibit a high luminance over 1500 cd m −2 and a high peak current efficiency of ≈0.4 cd A −1 at 1000 cd m −2 .
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Chen Wang,Zhongfang Li,Likai Wang,Xueliang Niu,Suwen Wang
Exploring the oxygen electrocatalysts with both high oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) performance is crucial to developing the rechargeable Zn–air batteries (ZABs). Herein, we prepared a bifunctional three-dimensional graphene-like iron-nitrogen doped oxygen electrocatalyst (3D Fe/N-G#4, polyacrylamide (PAM):NaCl = 1:4, mass ratio) by a facile synthesis with PAM and iron as precursors and NaCl as template. The NaCl template melted during the pyrolysis process, which could fabricate a stable 3D network structure in the precursors to form more mesopores, higher specific surface area, and more exposed active sites and prevent the loss of precursors. The low-cost and water-soluble PAM as the N precursor provided abundant N and dissolved adequately with NaCl solution. The Fe precursor coordinated with the N to form Fe-Nx active sites that were investigated by HR-TEM, XRD, XPS, and RDE techniques. The 3D Fe/N-G#4 exhibited excellent electrochemical activity with a high half-wave potential (0.852 V vs RHE) for ORR and a low overpotential (393 mV at 10 mA cm–2) for OER in the alkaline conditions. In addition, the homemade rechargeable ZAB based on the prepared 3D Fe/N-G#4 exhibits high power density (168.2 mW cm–2) and excellent discharge-charge cycling stability (over 60 h) at 20 mA cm–2. This work provides a cost-efficient, simple, and eco-friendly method to synthesize excellent bifunctional non-noble electrocatalysts for commercialization of ZABs.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 42
·1703779
·
IF 12.124
Li An,Yuxuan Li,Mingchuan Luo,Jie Yin,Yong-Qing Zhao,Cailing Xu,Fangyi Cheng,Ying Yang,Pinxian Xi,Shaojun Guo
The exploration of highly efficient nonprecious metal bifunctional electrocatalysts to boost oxygen evolution reaction and oxygen reduction reaction is critical for development of high energy density metal-air batteries. Herein, a class of CuS/NiS 2 interface nanocrystals (INs) catalysts with atomic-level coupled nanointerface, subtle lattice distortion, and plentiful vacancy defects is reported. The results from temperature-dependent in situ synchrotron-based X-ray absorption fine spectroscopy and electron spin resonance spectroscopy demonstrate that the lattice distortion of 14.7% in CuS/NiS 2 caused by the strong Jahn–Teller effect of Cu, the strong atomic-level coupled interface of CuS and NiS 2 domains, and distinct vacancy defects can provide numerous effective active sites for their excellent bifunctional performance. A liquid Zn-air battery with the CuS/NiS 2 INs as air electrode displays a large peak power density (172.4 mW cm −2 ), a high specific capacity (775 mAh g Zn −1 ), and long cycle life (up to 83 h), making the CuS/NiS 2 INs among the best bifunctional catalysts for Zn-air battery. More remarkably, the flexible CuS/NiS 2 INs-based solid-state Zn-air batteries can power the LED after twisting, making them be promising in portable and wearable electronic devices.
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高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Lin Yang,Ying-Jie Zhu,Han-Ping Yu,Zhong-Yi Wang,Long Cheng,Dan-Dan Li,Jingchao Tao,Guo He,Heng Li
The rampant dendrites growth caused by uncontrolled deposition of Zn 2+ ions at Zn metal anode poses a significant obstacle to the practical applications of aqueous zinc-ion batteries (ZIBs). Herein, an ultrathin (5 µm) aramid nanofiber (ANF) separator is reported to enhance the Zn anode stability and the ZIB energy density. Through systematic experimental studies and DFT simulations, it is demonstrated that the ANF separator with unique surface polarity can modify the solvation configuration, facilitate desolvation, and regulate the deposition orientation of Zn 2+ ions. Consequently, the Zn anode with the ANF separator demonstrates an 85-fold increase in running time beyond 850 h compared with the conventional glass fiber separator at 5 mA cm −2 /2.5 mAh cm −2 . Even under the harsh depth of discharge conditions of 50% and 80%, the Zn anodes still sustain extended cycling periods of over 475 and 200 h, respectively. As pairing this ANF separator with thin Zn anode and high-areal-capacity Mn 2.5 V 10 O 24 ∙5.9H 2 O cathode in a low negative capacity/positive capacity ratio (2.64) full cell, superior gravimetric/volumetric energy density (129.2 Wh kg −1 /142.5 Wh L −1 ) is achieved, far surpassing majority of the ZIB counterparts reported in the literature. This work offers a promising ultrathin separator for promoting the utilization of energy-dense aqueous ZIBs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinyang Wang,Xinyu Luo,Rui Li,Yu Chang,Jianbiao Peng,Weilai Wang,Haijin Liu,Guangxuan Yan,Pengkun Wei,Zhiguo Cao
Florfenicol (FLO) is a broad-spectrum halogenated antibiotic (containing F and Cl atoms), and the discharged FLO in wastewater exhibits potential biotoxicity. Peroxymonosulfate (PMS) activation can generate reactive oxygen species (ROSs) to realize efficient degradation of organic pollutants. Herein, Zn-substituted Co 3 O 4 (Zn x Co) catalysts were prepared and applied in PMS activation for FLO degradation. The physicochemical properties were systematically studied by combining experiments and density functional theory (DFT) calculation. The Zn partial substitution induced electron rearrangement and promoted oxygen vacancy (OV) formation in Co 3 O 4 . Zn 0.03 Co catalyst exhibited superior FLO removal, achieving a higher reaction rate of 0.112 min −1 than Co 3 O 4 (0.053 min −1 ). The FLO degradation was highly dependent on the factors of PMS/Zn 0.03 Co/FLO dosage, temperature, initial pH, and coexisting inorganic anions. The Zn 0.03 Co also displayed outstanding performance in PMS activation for degradation of various typical organic pollutants. Electron paramagnetic resonance (EPR) spectra and quenching experiments indicated that both radical species ( · OH , SO 4 · - , and · O 2 - ) and nonradical species ( 1 O 2 ) contribute to FLO removal. The redox cycle of Co 3+ /Co 2+ and OVs played an essential role in PMS activation. The electron structure of FLO and parameters of PMS adsorbed on Zn x Co were calculated. The longer length of Co O and O O bonds for the adsorbed PMS could enhance its activation to generate ROSs. The intermediates were detected, and five degradation pathways were proposed. The acute and chronic toxicities of intermediates suggested that the dechlorination process is important for the toxicity attenuation of FLO. This study clarified the performance enhancement mechanism of Zn substitution on FLO degradation by PMS activation using Co 3 O 4 based catalyst, which favors the development of PMS-based advanced oxidation processes for wastewater treatment.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Yu Zhao,Nana Li,Bin Xu,Bingzhi Dong,Shengji Xia
Hybrid poly(vinylidene fluoride) (PVDF) embedded with Zn–Al layered double hydroxides (LDH) membranes were fabricated via phase inversion. The physical and chemical properties of the novel polymer membranes were characterized using different characterizations. Filtration and antifouling experiments were performed to examine the water permeability, rejection and antifouling ability of the prepared membranes. Results showed that membrane morphology was greatly changed due to the addition of LDH and that the hybrid membrane exhibited greatly improved surface hydrophilicity, water permeability and antifouling property, with contact angle decreased from 76.5° to 69.0° and pure water (PW) flux increased from 8.01 L/m 2 h bar to 48.95 L/m 2 h bar.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 39
·
IF 1.866
Yu Zhao,Nana Li,Fangzhu Yuan,Haiding Zhang,Shengji Xia
Zn–Al layered double hydroxide (LDH)-entrapped poly(ether sulfone) (PES) ultrafiltration membranes with four different weight percentages, 0.5, 1.0, 2.0, and 3.0%, were prepared by a phase-inversion method. Characterization by scanning electron microscopy, atomic force microscopy and contact angle (CA), equilibrium water content, porosity, average pore size, mechanical strength, and ζ potential measurement were used to evaluate the morphological structure and physical and chemical properties of membranes. Static protein adsorption, filtration, and rejection experiments were conducted to study the antifouling properties, water permeability, and removal ability of the modified membranes. The results show that significant change occurred in the membrane morphology and that better hydrophilicity, water permeability, and antifouling ability were also achieved for the PES/LDH membranes when a proper amount of LDH was used. For example, the CA value decreased from 66.60 to 50.21°, and the pure water flux increased from 80.21 to 119.10 L m −2 h −1 bar −1 when the LDH loading was increased from 0 to 2.0 wt %. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43988.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2016
·
IF 4.712
Sheying Dong,Dandan Zhang,Gaochao Suo,Wenbo Wei,Tinglin Huang
A novel multi-function Metal-Organic Framework composite Ag@Zn-TSA (zinc thiosalicylate, Zn(C 7 H 4 O 2 S), Zn-TSA) was synthesized as highly efficient immobilization matrixes of myoglobin (Mb)/glucose oxidase (GOx) for electrochemical biosensing. The electrochemical biosensors based on Ag@Zn-TSA composite and ionic liquid (IL) modified carbon paste electrode (CPE) were fabricated successfully. Furthermore, the properties of the sensors were discussed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and amperometric current-time curve, respectively. The results showed the proposed biosensors had wide linear response to hydrogen peroxide (H 2 O 2 ) in the range of 0.3–20,000 μM, to nitrite (NO 2 − ) for 1.3 μM–1660 μM and 2262 μM–1,33,000 μM, to glucose for 2.0–1022 μM, with a low detection limit of 0.08 μM for H 2 O 2 , 0.5 μM for NO 2 − , 0.8 μM for glucose. The values of the apparent heterogeneous electron transfer rate constant ( k s ) for Mb and GOx were estimated as 2.05 s −1 and 2.45 s −1 , respectively. Thus, Ag@Zn-TSA was a kind of ideal material as highly efficient immobilization matrixes for sensitive electrochemical biosensing. In addition, this work indicated that MOF nanocomposite had a great potential for constructing wide range of sensing interface.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）