RSC Advances
·
2016
·Vol. 6
·期 92
·89821-89826
·
IF 3.289
Xinyu Wang,Defeng Xing,Nanqi Ren
The biocathode bioelectrochemical system (bioc-BES) was used for p-nitrophenol (PNP) degradation with sodium bicarbonate as the carbon source. The PNP degradation efficiency in bioc-BES with applied voltage of 0.5 V reached 96.1% ± 0.5% within 72 h, which was much higher than that obtained in the biocathode BES without applied voltage (bioc-BES-NAP), open circuit biocathode BES (OC-bioc-BES) or abiotic cathode BES (abioc-BES). With the increase in the PNP concentration from 20 mg L−1 to 60 mg L−1, the PNP concentration of the effluent decreased from 21.66 ± 2.94 mg L−1 to 0.38 ± 0.1 mg L−1 in 48 h. The final reductive product of PNP was p-aminophenol (PAP) in the biocathode chamber. High-throughput 454 pyrosequencing showed that predominant populations in the biocathode biofilm of bioc-BES were affiliated with electrochemically active Delftia and Diaphorobacter, while Aminobacter was the predominant population in the biocathode biofilm of the bioc-BES-NAP and OC-bioc-BES. These results suggested that microbial electrocatalysis and electrochemically active bacteria on the cathodic electrode accelerated PNP degradation in the biocathode BES (bioc-BES). The biocathode BES will be a promising treatment technology for PNP-containing wastewater.
研究领域:
环境微生物学
·
环境工程
·
生物电化学
·
污染物降解
·
废水处理
·
微生物生态学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2016
·
IF 11.553
Jingxian Zhang,Ning Zhao,Miao Zhang,Yiqiu Li,Paul K. Chu,Xiangxin Guo,Zengfeng Di,Xi Wang,Hong Li
Solid-state electrolytes with high ionic conductivity , large electrochemical window, good mechanical properties , and easy processability are needed for high-energy solid-state lithium batteries . In this work, composite membranes consisting of lithium garnet (i.e. Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 , LLZTO) particles and Li-salt-free polyethylene oxides (PEOs) are produced as solid-state electrolytes. Li-ion-conducting particles in nano-scale are crucial for the enhancement of conductivity and the membranes containing ~40 nm LLZTO particles exhibit conductivities nearly two orders of magnitude larger than those with the micro-scale ones, which is attributed to the difference in specific surface area related to the percolation effect. Compared to the conventional PEO doped with lithium salt, the insulating PEO in PEO:LLZTO membrane electrolyte is conducive to the suppression of lithium dendrite growth owing to prohibition of current flow. With PEO:LLZTO membrane electrolytes in conductivity of 2.1×10 −4 S cm −1 at 30 °C and 5.6×10 −4 S cm −1 at 60 °C, the solid-state LiFePO 4 /PEO:LLZTO/Li and LiFe 0.15 Mn 0.85 PO 4 /PEO:LLZTO/Li cells deliver energy densities of 345 Wh kg −1 (662 Wh L −1 ) and 405 Wh kg −1 (700 Wh L −1 ) (without the package weight or volume) with good rate capability and cycling performance. This study suggests that the conjunction of nano-scale Li-ion-conducting particles and an insulating polymer provides a promising solution to produce powerful solid-state electrolytes for high-performance solid-state lithium batteries .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子科学
·
固态电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 18
·6736-6741
·
IF 5.101
Xiwei Zhang,Jiansheng Jie,Zhi Wang,Chunyan Wu,Li Wang,Qiang Peng,Yongqiang Yu,Peng Jiang,Chao Xie
Single-crystal p-type ZnSe nanowires (NWs) with zinc blende structure and [21–1] growth direction were synthesized by using bismuth (Bi) as dopant via a thermal co-evaporation method. The ZnSe : Bi NWs showed evident p-type conductivity with hole concentration up to 4.1 × 1018 cm−3 after the acceptor activation. Negative photoconductivity was first investigated in the p-ZnSe NWs, i.e., the conductivity of the NWs under light was dramatically lower than that in the dark. Surface effects arising from oxygen absorption and photo-desorption were suggested to be responsible for this. By using Al as the Schottky gate, high-performance nano-metal-semiconductor field-effect transistors (nanoMESFETs) were constructed, and measurements on the Al/p-ZnSe NW Schottky diode also revealed the bias-dependent photoresponse. It is expected that the p-type ZnSe : Bi NWs will have great potential in nano-optoelectronic applications.
研究领域:
材料科学
·
半导体物理
·
纳米技术
·
光电子学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Murong Xi,Zhenjie Liu,Rui Sheng,Jiafeng Zhu,Yong Guo,Juan Ding,Xingchao Wang,Yue Zhang,Lei Wang,Zhipeng Sun,Wenjun Zhang,Jiulin Wang,Yudai Huang
Dissolutions of the polymer in the chaotropic salts follow Hofmeister effect, and the aggregate of salts and solvents shows new influence of the Hofmeister effect. Here, we reveal the aggregation of ion–solvent in chaotropic salt solution catalyzes the formation of the exposed Lewis acid-base center and realizes the dissolution of polyamide (PA) macromolecules. The relationship between Hofmeister effect, aggregate chemistry and Lewis acid-base chemistry is examined from new perspective. And then, a new solvent system and phase conversion process are designed for polyamides. Finally, the applications of PA in ZIBs as coating layer and binder are realized. As an electrode coating, it can effectively inhibit hydrogen evolution, corrosion and dendrite problems and improve the cycle life (cycle over 1500 h at 0.5 mA cm −2 ). As a binder, the active material adhesion on current collector, uniformity and wettability of the electrode are improved. The assembled pouch-cell with PANI cathode shows a capacity of 150 mAh g −1 after 120 cycles. This work reveals the secret of controlled phase transformation of polyamide in saline solution from a new perspective. And this phase conversion method is simpler, greener and more environmentally friendly, which greatly accelerates the application of polyamide in the field of membrane science and binder science.
研究领域:
高分子化学
·
电化学
·
材料科学
·
能源存储
·
膜科学
·
粘结剂科学
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Qianlong Zhou,Chunyang Jia,Xingke Ye,Zhonghua Tang,Zhongquan Wan
At present, the topic of building high-performance, miniaturized and mechanically flexible energy storage modules which can be directly integrated into textile based wearable electronics is a hotspot in the wearable technology field. In this paper, we reported a highly flexible fiber-shaped electrode fabricated through a one-step convenient hydrothermal process. The prepared graphene hydrogels/multi-walled carbon nanotubes-cotton thread derived from natural cotton thread is electrochemically active and mechanically strong. Fiber-shaped supercapacitor based on the prepared fiber electrodes and polyvinyl alcohol-H 3 PO 4 gel electrolyte exhibits good capacitive performance (97.73 μF cm −1 at scan rate of 2 mV s −1 ), long cycle life (95.51% capacitance retention after 8000 charge-discharge cycles) and considerable stability (90.75% capacitance retention after 500 continuous bending cycles). Due to its good mechanical and electrochemical properties , the graphene hydrogels/multi-walled carbon nanotubes-cotton thread based all-solid fiber-shaped supercapacitor can be directly knitted into fabrics and maintain its original capacitive performance. Such a low-cost textile thread based versatile energy storage device may hold great potential for future wearable electronics applications.
研究领域:
材料科学
·
纳米技术
·
柔性电子学
·
能源存储
·
纺织工程
✓ 已验证
DOI
高影响因子
Advanced Sustainable Systems
·
2024
·Vol. 8
·期 8
·2400098
·
IF 6.5
Fuyu Xiao,Wenbin Lai,Shihan Zeng,Lingjun He,Mingyang Ge,Fenqiang Luo,Peixun Xiong,Hui Lin,Chuyuan Lin,Yongjin Luo,Jixiang Zhang,Qingrong Qian,Qinghua Chen,Lingxing Zeng
The resource scarcity and pollution leakage risk caused by discarding the spent power lithium-ion batteries has aroused growing concern. Recovering and regenerating the cathode material from spent power lithium-ion batteries in an easy and environmentally friendly manner remains a significant challenge and an area of focus in battery research. Hence, a green and convenient method to recover FePO 4 from spent LiFePO 4 cathode powder by using Na 2 S 2 O 8 as an oxidizer and as cathode materials for lithium/sodium-ion batteries (LIBs/SIBs) is reported. Benefiting from the remarkable graphene oxide (GO) and vanadium oxide (V 2 O 5 ) coating, the regenerated FePO 4 –V 2 O 5 –graphene oxide (FePO 4 –V 2 O 5 –GO) is suitable for Li/Na storage (153 mAh g −1 at 0.2C/118 mAh g −1 at 0.5C). The high capacity retention, that stable for 300 cycles in LIBs and 300 cycles for SIBs, is also realized due to the stable structure. This work provides a green strategy for regenerating the cathode of spent lithium-ion batteries and designing cathodes of alkali metal ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
环境科学
·
资源回收
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·Vol. 39
·期 9
·4198-4205
·
IF 2.93
Zhenlong Zhang,Jichun Zhu,Shengjun Li,Xiangyang Liu,Yanli Mao
In this paper, TiO 2 nanotube (TNT) arrays and (Cu 2 Sn) x /3 Zn 1− x S ( x = 0.75, 0.24, and 0.09) nanocrystals were prepared, and TiO 2 nanotubes (TNTs) were sensitized with (Cu 2 Sn) x /3 Zn 1− x S nanocrystals. Compared with the plain TNTs, (Cu 2 Sn) x /3 Zn 1− x S sensitized TNTs present an enhanced photoelectrochemical response. The photocurrent enhancement was characterized with the photocurrent ratio of (Cu 2 Sn) x /3 Zn 1− x S sensitized TNTs to plain TNTs, which were 1.50, 1.63, and 2.13 for (Cu 2 Sn) x /3 Zn 1− x S with the composition of x = 0.75, 0.24, and 0.09, respectively. To understand this phenomenon, the energy band alignments of TNTs and (Cu 2 Sn) x /3 Zn 1− x S were investigated, based on which the conduction band offsets (CBO) between TNTs and (Cu 2 Sn) x /3 Zn 1− x S were determined, which were 0.31, 0.47, and 0.63 eV for (Cu 2 Sn) x /3 Zn 1− x S with the composition of x = 0.75, 0.24, and 0.09, respectively. These results display that the photocurrent enhancement becomes large with the increase of CBO, which indicates that the enhanced photoelectrochemical response is mainly due to the energy level matching between TNTs and (Cu 2 Sn) x /3 Zn 1− x S, and the variation of enhancement is resulting from the change of CBO.
研究领域:
材料科学
·
光催化
·
半导体纳米材料
·
能源材料
·
光电化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2013
·Vol. 31
·期 3
·371-376
·
IF 0.917
Wei Zhu,Haoyang Wang,Haihui Peng,Guosheng Liu,Yinlong Guo
Pd-catalyzed oxidative coupling reaction was of great importance in the aromatic C H activation and the formation of new C O and C C bonds. Sanford has pioneered practical, directed C H activation reactions employing Pd(OAc) 2 as catalyst since 2004. However, until now, the speculated reactive Pd(IV) transient intermediates in these reactions have not been isolated or directly detected from reaction solution. Electrospray ionization tandem mass spectrometry (ESI-MS/MS) was used to intercept and characterize the reactive Pd(IV) transient intermediates in the solutions of Pd(OAc) 2 -catalyzed oxidative coupling reactions. In this study, the Pd(IV) transient intermediates were detected from the solution of Pd(OAc) 2 -catalyzed oxidative coupling reactions by ESI-MS and the MS/MS of the intercepted Pd(IV) transient intermediate in reaction system was the same with the synthesized authentic Pd(IV) complex. Our ESI-MS(/MS) studies confirmed the presence of Pd(IV) reaction transient intermediates. Most interestingly, the MS/MS of Pd(IV) transient intermediates showed the reductive elimination reactivity to Pd(II) complexes with new C O bond formation into product in gas phase, which was consistent with the proposed reactivity of the Pd(IV) transient intermediates in solution.
研究领域:
有机化学
·
金属有机化学
·
分析化学
·
催化化学
·
质谱学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2016
·
IF 4.055
Qing Bao,Hua Li,Yang Li,Jinghui He,Qingfeng Xu,Najun Li,Dongyun Chen,Lihua Wang,Jianmei Lu
In this paper, two acceptor-donor-acceptor (A-D-A) type organic small molecules, 4,4'-(5,5'-(benzo[c] [1,2,5]thiadiazole-4,7-diyl)bis(3-hexylthiophene-5,2-diyl))bis(N-(4-nitrophenyl)-N-phenylaniline) (NTPA 2 TBT) and 4,4'-(5,6-difluorobenzo[c] [1,2,5]thiadiazole-4,7-diyl)bis(N-(4-nitrophenyl)-N-phenylaniline) (NTPA 2 BTF 2 ), were synthesized and fabricated into resistive random access memory devices. Compared with our previously reported molecule NTPA 2 BT, NTPA 2 TBT has 3-hexylthiophene linkages bridging its donor and acceptor, while there are two additional fluorine atoms in the benzothiadiazole moiety for NTPA 2 BTF 2. Both the fabricated memory devices based on these two new molecules perform nonvolatile ternary memory characteristics with lower threshold voltages , higher reproducibility and better stability. The addition of 3-hexylthiophene bridges significantly promotes the planarity of the conjugation backbone and facilitates the molecular stacking, while the substitution hydrogen by fluorine improves the intermolecular interaction , and thus also induces an ordered molecular stacking. The insertion of 3-hexylthiophene bridges or fluorine atoms could be an effective strategy of tailoring organic molecules to improve data storage performance with lower power consumption.
研究领域:
材料科学
·
有机电子学
·
分子器件
·
非易失性存储器
·
高分子化学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Xiaojing Jiang,Jianian Chen,Fenglei Lyu,Chen Cheng,Qixuan Zhong,Xuchun Wang,Ayaz Mahsud,Liang Zhang,Qiao Zhang
Controllable fabrication of Fe-N-C based single-atom catalysts (SACs) for enhanced electrocatalytic performance is highly desirable but still challenging. Here, an in situ surface-confined strategy was demonstrated for the synthesis of single atomic Fe-N 4 on N-doped carbon nanoleaves (L-FeNC). The in situ generated Zn 3 [Fe(CN) 6 ] 2 could not only serve as a protection layer against collapse of nanoleaves but also provide abundant Fe source for the formation of Fe-N moieties during pyrolysis, leading to high surface area and high graphitization degree of L-FeNC simultaneously. Benefiting from abundant Fe-N 4 active sites, enhanced mass and charge transfer, the as-prepared L-FeNC manifested a half-wave potential of 0.89 V for oxygen reduction reaction (ORR) in 0.1 M KOH. A maximum power density of 140 mW cm −2 and stable discharge voltage even after operation for 50,000 s have been demonstrated when the L-FeNC was used as air cathode for Zn-air battery. This work not only provided a unique surface-confined strategy for the synthesis of two-dimensional nanocarbons, but also demonstrated the significant benefit from rational design and engineering of Fe-N-C SACs, thus offering great opportunities for fabrication of efficient energy conversion and storage devices.
研究领域:
材料科学
·
电化学
·
能源存储与转换
·
纳米科技
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Cheng Lin,Liuzhang Ouyang,Chaojin Zhou,Renzong Hu,Lichun Yang,Xusheng Yang,Huaiyu Shao,Min Zhu
Potassium-ion batteries (PIBs) are becoming one of the promising alternative metal-ion battery systems to lithium-ion batteries due to the abundance and low cost of potassium . Among the anode materials for the metal-ion battery systems, phosphorus-based materials are attractive due to the low cost and their high theoretical-specific capacity. Herein, for the first time, we report the selenium -phosphorous-carbon (Se–P–C) amorphous composites prepared by the plasma-assisted ball milling method as the high-performance anode material for PIBs. In particular, when the amorphous Se–P composite anode with the molar ratio of 1:2 and the P-milling time of 30 h (Se–2P/C@30 h), the associated PIB delivers a high reversible capacity of 634 mA h g −1 at a current density of 0.05 A g −1 and excellent rate capability of 248.6 mA h g −1 at a current density of 1 A g −1 . Furthermore, the experimental characterization and analysis reveal the reaction mechanisms that K–P (K 2 P 3 ) and K–Se (KSe) phases are formed during the potassiation process. The present work provides a facile approach to achieve a promising anode material for K-ion batteries, and the preparation route can be viewed as a reference for the further development of phosphorous-based anodes with high capacity and long cycle life for PIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
无机化学
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2018
·Vol. 62
·期 4
·519-526
·
IF 4.318
Zhang Busheng,Lei Yan,Qi Ruijuan,Yu Haili,Yang Xiaogang,Cai Tuo,Zheng Zhi
Both bismuth and copper are non-toxic and earth-abundant elements suitable for lead-free halide perovskite-like photovoltaic devices. Here, we report a highly facile route for in-situ producing copper-bismuth-iodide (CuBiI 4 ) thin films directly on ITO substrate at room temperature, by utilizing a Bi-Cu alloy layer as precursor. X-ray diffraction and transmission electron microscopy (TEM) results verified the formation of well crystallized CuBiI 4 thin films with [222] orientation. The transient photovoltage (TPV) analysis revealed that the CuBiI 4 is an n-type semiconductor with a suitable band gap of ~1.81 eV, preferable to photoelectric conversion compared with CH 3 NH 3 PbI 3 . It is very interesting that the subsequent spin-coating process of the classical Spiro-MeOTAD organic solution with TBP and acetonitrile resulted in a dense and smooth CuBiI 4 :Spiro-MeOTAD bulk-heterojunction film. The preliminarily fabricated simple sandwich structures of ITO/CuBiI 4 :Spiro-MeOTAD/Au hybrid solar cell devices displayed efficient photovoltaic performance with the PCE up to 1.119% of the best sample. The room temperature direct metal surface elemental reaction (DMSER) method may provide a new insight for all-inorganic lead free perovskite-like A a B b X x compounds and high performance photovoltaic devices.
研究领域:
材料科学
·
光伏技术
·
无机化学
·
半导体物理
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）