JOURNAL OF POWER SOURCES
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2022
·
IF 9.794
Yiming Xiao,Qixuan Ma,Xiaoyu Shen,Songbo Wang,Jun Xiang,Lei Zhang,Penggao Cheng,Xinjun Du,Zhen Yin,Na Tang
Phosphoric acid (PA) doped polybenzimidazole (PBI) membrane has been regarded as one of most effective high temperature proton exchange membrane (HT-PEM). However, it has to face poor mechanical properties at high acid doping levels (ADLs) and significant acid loss at high temperature during the operation of fuel cell. Herein, we prepare cross-linked PBI membranes containing different contents of the cross-linker three-dimensional polyaniline (PANI) via a facile N-substitution reaction. The obtained cross-linked PBI membrane exhibits superior tensile strength , stability and proton conductivity . More importantly, robust mechanical strength and good acid retention of the PA-doped cross-linked PBI membrane are demonstrated even at high ADL (above 20). The cross-linked PANI-30%-g-OPBI membrane exhibits a high ADL of 22.9, high proton conductivity of 122.8 mS cm −1 at 160 °C. Furthermore, the peak power density reaches 447 mW cm −2 at 160 °C, which is 2.5 times than that based on the corresponding PBI membrane. Molecular dynamics simulation results indicate that the decreased mobility of polymer chains improve the mechanical properties of the cross-linked membranes, and the high intermolecular interaction energy of the aniline-biphosphate ion pair significantly decrease PA leaching in the membranes due to the introduction of 3D molecular structure of PANI.
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高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 12
·1254-1260
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IF 3.532
Yamin Si,Feng Jiang,Liang Qiang,Xiaotong Teng,Chengbin Gong,Qian Tang
Dibenzothiophene and its derivatives in gasoline and diesel would release sulfur oxides during combustion, and this is harmful to human health and the environment. This paper reports a method based on a visible-light-responsive molecularly imprinted polyurethane (VMIPU) to monitor trace dibenzothiophene in gasoline. The VMIPU was prepared by a polyaddition reaction using N,N-bis-(2-hydroxyethyl)-4-phenylazoaniline as the functional monomer, dibenzothiophene as the template molecule, diphenylmethane diisocyanate as the crosslinker and castor oil as the chain extender. The VMIPU showed good visible-light-response and specific adsorption for dibenzothiophene. The trans → cis photoisomerization rate constant of azobenzene chromophores in the VMIPU shows a linear relationship with the dibenzothiophene concentration in the range of 0–20 μmol L−1. This was used to estimate trace dibenzothiophene in spiked gasoline with recoveries of 95.7–101.0% and relative standard deviations of 7.0–12.7%.
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PubMed
高影响因子
DESALINATION
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2022
·
IF 11.211
Yayue Lv,Sifan Wu,Junbin Liao,Yangbo Qiu,Jun Dong,Chunhong Liu,Huimin Ruan,Jiangnan Shen
Currently, water shortage has been emerged as a severe problem in human life. In this work, a zero liquid discharge technology was proposed combining macroporous resin adsorption and desorption, bipolar membrane electrodialysis (BMED) and electrodialysis (ED). During the process of resin adsorption and desorption, the adsorption capacity of the resin and the concentration of the desorption solution were investigated. In addition, the power supply, volume ratio, membrane type in BMED/ED processes were investigated. According to the results of the study, the eluting agent solution of 4% NaOH was the optimal content, with a desorption rate of 97.49%. In the BMED process, the acid/base concentration reached 1.25 mol/L and 0.85 mol/L, respectively. During ED process, the final concentration of NaOH was 0.14 mol/L, and the COD rejection rate reached 93.3%. In the whole work, the NaOH and the macroporous resin were recycled, which achieved the closed-loop zero liquid discharge of salt recycling and reuse in wastewater. Furthermore, techno-economic analysis (0.79 $/kg, 0.21 $/kg) and water recovery rate calculations (96%, 83%) were carried out for the BMED and ED processes, which demonstrated that the process was promising for industrial application.
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高影响因子
Materials Advances
·
2022
·Vol. 3
·期 4
·2026-2036
·
IF 0
Shaoqiu Ke,Di Xie,Kai Zhang,Fangchao Cheng,Yiqiang Wu
Herein, we demonstrate a structure-enabled strategy to construct an ultrastable, high-performance, ultraflexible all-in-one supercapacitor with a one-piece wood cellulose network/polyaniline/multiwalled carbon nanotube composite as both the electrodes and the separator. A cellulose network was used as the carrier and separator, and multiwalled carbon nanotube and polyaniline acted as conducting materials. Excellent flexibility was achieved by combining the cellulose network with a polyvinyl alcohol-based electrolyte. Natural directional channels in the cellulose network and the gradual distribution of the polyaniline and carbon nanotube within the structure enabled the construction of an integrated supercapacitor with reduced contact resistance between layers and improved electronic/ionic conductivity and stability. The supercapacitors resulted in a high specific areal capacitance of 0.71 F cm−2, as well as ultrastable cycle performance, which led to a 106.68% retention of the specific capacitance after 50 000 loops at a current density of 3 A g−1. The current study provides a nature-inspired strategy to rationally design and construct environmentally friendly high-performance and ultrastable energy storage devices.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 8
·4110-4119
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IF 14.511
Da Liu,Wenkai Fang,Jiangtao Li,Liling Zhang,Mei Yan,Hongwu Tang
In general, enrichment of a higher number of exoelectrogens implies higher power density. However, the low electrocatalytic activity of anodes limits the performance of microbial fuel cells. Here, based on this consideration, we designed and fabricated an anode by integrating the 3D hierarchical architecture and excellent electrocatalytic activity of MoO2/MoC@NC nanodendrites grown on carbon fiber cloth. The as-designed MoO2/MoC@NC-CC electrode exhibits a relatively large specific areal capacitance of 710.21 F m−2 and a charge transfer resistance of only 5.29 Ω, which are 46.9 times higher and 67.9 times lower than those of the bare carbon cloth (CC) anode respectively, providing abundant electroactive sites for the colonization of exoelectrogens and accelerating the rate of extracellular electron transfer. At the same time, there was a positive correlation between the enrichment amount of Geobacter and the power density, demonstrating the successful preparation of the desired electrode. In addition, the branched-lily-like architecture of the MoO2/MoC@NC-CC anode exhibits super hydrophilicity and open 3D structure, facilitating microbial attachment, colonization, proliferation and diffusion of the internal culture matrix, thus shortening the start-up time and improving the long-term stable current output. Consequently, the MoO2/MoC@NC-CC anode achieved the maximum power density of 2.93 W m−2, which is improved by 70.3% compared to that of the bare CC, and is also the best among the reported Mo-based nanomaterial modified electrodes. This work presents valuable insights for the design and fabrication of high performance anodes for MFCs.
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高影响因子
Journal of Energy Chemistry
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2022
·
IF 13.599
Mengru Wang,Yuxue Yue,Yi Wang,Xiaoling Mou,Renqin Chang,Zupeng Chen,Ronghe Lin,Jia Zhao,Yunjie Ding
A systematic study on the structure sensitivity, host effect, and the deactivation mechanism of Ir-catalyzed selective hydrogenation of 1,3-butadiene, a key process in the purification of alkadiene for the upgrading of C4 cut, is presented by coupling steady-state catalytic testing, in-depth characterization, kinetic evaluation, and density functional theory calculations. We reveal that: (i) 1,3-Butadiene hydrogenation on iridium is structure-sensitive with the optimal particle size of about 2 nm, and the H 2 dissociation energy is a reliable activity descriptor; (ii) The nature of the NC hosts exerts a critical impact on the catalytic performance, and balanced nitrogen content and speciation seem key for the optimized performance; and (iii) Different deactivation mechanisms occur: fouling by coke deposition on the catalysts with a high N:C ratio (>1), and site blockage due to the competitive adsorption between 1-butene/ cis -2-butene and 1,3-butadiene. These molecular insights provide valuable guidelines for the catalyst design in selective hydrogenations.
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高影响因子
ANALYTICA CHIMICA ACTA
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2022
·
IF 6.911
Xiaohui Niu,Simeng Yan,Letong Wang,Jinliang Chen,Rui Zhao,Hongxia Li,Jian Liu,Kunjie Wang
So far, the fabrication of chiral metal-organic framework (CMOF) is difficult to predict and the chiral functionality mainly comes from the building blocks that is a part of the frameworks. The induction effect in the chiral nanochannels of the metal-organic framework (MOF) makes achiral polymers have chiral properties, which has not been well explored. Therefore, CMOFs with chiral nanochannels or chiral pores appear to have special functions. Herein, CMOFs (D-his-ZIF-8) with chiral micropores or chiral nanochannels are prepared through a simple 2-methyl imidazolate in-situ substitution by d -histidine. The unmodified polyaniline with chirality ( c -PANI) was synthesized in chiral nanochannels and pores of CMOF, which brought about chiral induction from the chiral nanochannels and pores of CMOF to c -PANI chains. The circular dichroism shows that the c -PANI chains released from the chiral nanochannel still maintains the chiral properties even leaves the chiral nanochannel. It can be seen from the electrochemical results that c -PANI has excellent conductivity, and the conductivity of CMOF is very poor. Electrochemical recognition showed that both CMOF and c -PANI have certain chiral recognition effects for L-Trp and D-Trp, from which the optimal recognition effect was obtained from c -PANI chains. This shows that the excellent conductivity of c -PANI not only expands the electrochemical signal, but also the helical structure of the c -PANI chains accelerates the distinction of chiral molecules. This study provides a novel perspective to induce chiral polymer chains with better conductivity in the nanochannels of CMOF.
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 139
·期 20
·52180
·
IF 3.057
Kongsen Hu,Jiyuan Feng,Nan Lv,Wenbo Jiang,Zhiwei Lyu,Qing Hai
Exploitation of soft piezoelectric sensing materials is fundamental to the research of energy-harvesting devices and wearable electronics. However, a big challenge of piezoelectric materials application in micro-scale sensing systems is to address the restrictions of electrode compatibility, miniaturization, multistep assembly, and high cost. Here, we propose a simple strategy to develop the coinstantaneous construction of piezoelectric materials and nanoresistance networks by fabricating electrospun piezoelectric-conductive (polyacrylonitrile)//(polyaniline/polyvinyl pyrrolidone) (denoted [PAN]//[PANI/PVP]) Janus nanofibers (NFs). This peculiar Janus structure can collect and output voltage by conductive paths based on the Wheatstone bridge principle. Moreover, owing to the nanoscale asymmetric geometry for efficient polarization and induced charges collection, the Janus NFs show superior piezoelectric properties. As a result, flexible (PAN)//(PANI/PVP) Janus nanofibers integrated membrane (JNFIM) dispensing with two flat electrodes can directly output a high voltage of 2 V under a tiny force of 1 N. Furthermore, the JNFIM enables to detect pressures with extra-high linear sensitivity (1.88 V N −1 ) and low detection limit (0.1 N). Thus, our work provides a simple route for the development of nanoscale, low-cost, and high-sensitivity integrated materials for pressure sensing, revealing promising applications in miniature robotics and wearable devices.
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高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 7
·e202101574
·
IF 4.782
Jia-Lin Du,Xu Bao,Wei-Bin Zhang,Lun Zhang,Yao-Wen Guo,Xia Zhou,Xian-Li Zhang,Shan-Shan Chai,Shao-Bo Guo,Xiong-Wei Han,Jianping Long
Graphical Layer by layer : The electrochemical kinetics of layered manganese phosphate are improved via interfacial polypyrrole chemical binding for electrochemical supercapacitor application. The major limitation of low-cost and high-safety aqueous manganese-based materials for electrochemical energy storage is largely hampered by their poor cyclic stability, usually caused by the manganese dissolution and interfacial kinetics. Herein, we synthesized a manganese phosphate material via interfacial polypyrrole chemical binding, with unique structural properties for aqueous supercapacitor application. It exhibited higher specific capacitance, remarkable rate performance and better cycle stability compared to bare manganese phosphate. In contrast with interfacial polypyrrole coating on manganese phosphate nanosheets, the polypyrrole could form a Mn−N bond with the manganese phosphate, indicating stable chemical binding. Thus, the appropriate interfacial chemical binding is an efficient strategy to improve the nanostructure stability and electrochemical kinetics of manganese-based materials for aqueous electrochemical energy storage.
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高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·1003-1016
·
IF 11.806
Xie Wenhao,Yao Feichong,Gu Hongbo,Du Ai,Lei Qin,Naik Nithesh,Guo Zhanhu
Herein, a novel three-dimensional nanocomposite aerogel (rGO/Fe 3 O 4 /PANI NAs) with outstanding magnetoresistance and piezoresistance was manufactured by the in-situ polymerized polyaniline nanoarrays (PANI NAs) surrounding magnetic reduced graphene oxide (rGO/Fe 3 O 4 ) aerogel that was prepared through the combination of hydrothermal method and lyophilization method. This rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel with 60 wt.% loading of PANI NAs well preserved the porous structure and gained a superior mechanical strength (121.04 kPa) compared with that of rGO aerogel, rGO/Fe 3 O 4 aerogel, and rGO/PANI NAs aerogel (43.54, 58.12, and 116.98 kPa, respectively). The rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel could hold its original state with almost 100% recovery ratio after cycling compression tests under 80% of deformation strain at a suitable compression rate of 5 mm min −1 . The introduction of PANI NAs into the rGO/Fe 3 O 4 aerogel also brought a satisfactory piezoresistive performance with a large gauge factor up to 2.83 and a superb stability for the electrical signal output (which was decreased only 5.80% after 500 compression cycles) to the rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel. The loading of Fe 3 O 4 and PANI NAs also provided rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel with a negative magnetoresistance value up to − 4.37%. The magnetoresistance was explained via the amelioration of spin transport in the material. The unique negative magnetoresistance and excellent piezoresistance make rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel a promising candidate for the development of advanced electronic devices. Graphical abstract A novel three-dimensional nanocomposite aerogel (rGO/Fe 3 O 4 /PANI NAs) exhibits amazing negative magnetoresistance and outstanding piezoresistive performance.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Xianhong Zheng,Yong Wang,Wenqi Nie,Zongqian Wang,Qiaole Hu,Changlong Li,Peng Wang,Wei Wang
Wearable electronics have attracted much attention in recent years, and textiles have been considered as the desirable substrate. However, it remains a critical challenge to fabricate electronic textiles that are multifunctional, breathable, highly conductive, and elastic. Herein, we develop a novel chemical polymerization and coating strategy to construct interconnected networks of polyaniline (PANI) nanoarrays and MXene on the fiber surface. The fabricated PANI nanoarrays/MXene modified rib knitting fabric exhibit low electrical resistance and good elasticity. The all-solid-state PANI/MXene fabric-based supercapacitors show a high specific capacitance and energy density of 647 mF/cm 2 and 8.08 μWh/cm 2 , respectively, which is higher than most MXene-based textiles. Moreover, the PANI/MXene fabrics demonstrate anisotropic yet exceptional strain sensing performance, including high sensitivity (gauge factor, 435.0), linearity (>0.9), and wide range (0–40.8%), which enables them as wearable sensors to detect large human motions accurately. This work provides a new approach to accomplishing high-performance textile-based wearable electronics.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yunlong Sang,Qi Liu,Shengxing Wang,Shuhan Dong,Yongzhe Fan,Xue Zhao,Shijie Li
Polyaniline (PANI) was covalently linked with hexagonal boron nitride (BN) using p-aminobenzoic acid (ABA) to obtain a PANI-BN powder. The PANI-BN/EP coating was applied on hot-dip galvanized steel, which exhibited remarkable corrosion resistance. Electrochemical test results showed that the impedance modulus in the low-frequency region of PANI-BN/EP was maximum after soaking in NaCl solution (3.5 wt.%) for 72 h compared with other coatings. The outstanding corrosion resistance of the PANI-BN/EP coating was primarily attributed to the synergistic effect of BN and PANI.
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高影响因子
危险品化学品经营许可证（带存储）