JOURNAL OF HAZARDOUS MATERIALS
·
2013
·
IF 3.925
Zhiqiao He,Junjun Sun,Jie Wei,Qiong Wang,Chengxiang Huang,Jianmeng Chen,Shuang Song
To enhance the activity of chemi-deposited palladium/nickel foam (Pd/Ni) electrodes used for an electrochemical dechlorination process, silver or copper was deposited electrochemically onto the nickel foam substrate (to give Ag/Ni or Cu/Ni) before the chemical deposition of palladium. The physicochemical properties of the resulting materials (Pd/Ni, Pd/Ag/Ni and Pd/Cu/Ni) were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and their electrochemical catalytic activities were evaluated by monitoring the electrochemical dechlorination of 2-chlorobiphenyl (2-CB) in strongly alkaline methanol/water solution. The results show that the Pd/Ag/Ni and Pd/Cu/Ni electrodes had consistently higher electrocatalytic activities and current efficiencies (CEs) compared with the untreated Pd/Ni electrode. The Pd/Ag/Ni electrode exhibited the highest activity. The dechlorination was also studied as a function of Pd loading, the Ag or Cu interlayer loadings, and the current density. The Pd loading and the interlayer loadings both had positive effects on the dechlorination reaction. Increasing the current density increased the reaction rate but reduced the CE. The improvement of the electrocatalytic activities of the Pd/Ni electrode by applying the interlayer of Ag or Cu resulted from the enlargement of the effective surface area of the electrode and the adjustment of the metal H bond energy to the appropriate value, as well as the effective adsorption of 2-CB on Ag. Moreover, the high catalytic activity of the Pd/Ag/Ni electrode was maintained after six successive cyclic experiments, whereas Pd/Cu/Ni electrodes deactivate severely under the same conditions.
研究领域:
环境科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Fangzhou Zhou,Fangqin Zeng,Xu Liu,Fangyang Liu,Ning Song,Chang Yan,Aobo Pu,Jongsung Park,Kaiwen Sun,Xiaojing Hao
Back contact modification plays an important role in improving energy conversion efficiency of Cu2ZnSnS4 (CZTS) thin film solar cells. In this paper, an ultrathin carbon layer is introduced on molybdenum (Mo)-coated soda lime glass (SLG) prior to the deposition of CZTS precursor to improve the back contact and therefore enhance CZTS solar cell efficiency. By introducing this layer, the short circuit current (Jsc) and device conversion efficiency increase for both nonvacuum (sol–gel) and vacuum (sputtering) methods. Specifically, for the sol–gel based process, Jsc increases from 13.60 to 16.96 mA/cm2 and efficiency from 4.47% to 5.52%, while for the sputtering based process, Jsc increases from 17.50 to 20.50 mA/cm2 and efficiency from 4.10% to 5.20%. Furthermore, introduction of this layer does not lead to any deterioration of either open circuit voltage (Voc) or fill factor (FF).
研究领域:
材料科学
·
太阳能技术
·
薄膜电池研究
✓ 已验证
DOI
PubMed
高影响因子
Membranes
·
2022
·Vol. 12
·期 10
·1011
·
IF 4.562
Zhen Wang,Xiaojuan Wang,Tao Zheng,Bing Mo,Huacheng Xu,Yijun Huang,Jian Wang,Congjie Gao,Xueli Gao
Nanofiltration (NF) membranes with a high permeability and rejection are of great interest in desalination, separation and purification. However, how to improve the permeation and separation performance still poses a great challenge in the preparation of NF membranes. Herein, the novel composite NF membrane was prepared through the interfacial polymerization of M-phenylenediamine (MPD) and trimesoyl chloride (TMC) on a double-walled carbon nanotube (DWCNT) interlayer supported by PES substrate. The DWCNT interlayer had a great impact on the polyamide layer formation. With the increase of the DWCNT dosage, the XPS results revealed an increase in the number of carboxyl groups, which decreased the crosslinking degree of the polyamide layer. Additionally, the AFM results showed that the surface roughness and specific surface area increased gradually. The water flux of the prepared membrane increased from 25.4 L/(m2·h) and 26.6 L/(m2·h) to 109 L/(m2·h) and 104.3 L/(m2·h) with 2000 ppm Na2SO4and NaCl solution, respectively, under 0.5 MPa. Meanwhile, the rejection of Na2SO4and NaCl decreased from 99.88% and 99.38% to 96.48% and 60.47%. The proposed method provides a novel insight into the rational design of the multifunctional interlayer, which shows great potential in the preparation of high-performance membranes.Keywords:interfacial polymerization;nanofiltration membranes;double-walled carbon nanotube;interlayer
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Jianlong Lei,Xundao Liu,Xiaohong Chen,Hanfeng Luo,Wei Feng,Jiangshan Zhang,Feng Liu,Supeng Pei,Yongming Zhang
Compromised performance caused by gas product adhesion remains a major challenge for membrane applications in chlor-alkali electrolysis. Here, an ultra-bubble-repellent sodium perfluorosulfonic acid (PFSA-Na) membrane with hierarchical structures of aggregated silica was successfully synthesized by tethering hydrophilic silica onto a mussel-inspired intermediate layer. The surface chemistry, morphology and loading could be controlled via surface tailoring of the silica by γ-(2,3-epoxypropoxy)propyltrimethoxysilane (KH560). The developed membrane exhibited high hydrophilicity (7.5 ± 1.3°), an ultralow bubble contact area (164.7 ± 2.1°) and negligible bubble adhesion forces (<6 μN) while maintaining efficient NaCl transport and low electric double layer resistance. The superaerophobic-hydrophilic surface enables an excellent cleaning property. When the modified membrane was applied in chlor-alkali electrolysis, the Cl 2 /H 2 gas bubbles were repelled from the membrane surface in time and minimized the negative effects of bubble adhesion, resulting in high-efficiency chlor-alkali electrolysis. Further, the developed membrane exhibited high stability during the continuous 10-h electrolysis process. This result indicates that developing a superaerophobic surface with highly efficient mass transport can lead to high-performance chlor-alkali electrolysis.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yanhua Zhang,Xinglong Gao,Zijun Tang,Yuhang Mei,Xing Xiang,Jiadong Deng
The lithium dendrites growth in Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolytes has severely restricted the development of all-solid-state lithium batteries. Herein, two different dynamic properties interlayers of electronically conductive Al and an electronically non-conductive Al 2 O 3 are constructed at the Li/LLZO interface, and the lithium dendrite growth mechanism is explored. Results show that battery with Al interlayer occur internal short circuit in 95 cycles, while the battery with annealed Al 2 O 3 interlayer has good cycle stability of 1000 cycles with polarization voltage below 0.1 V. Besides, dendritic lithium dendrites can be clearly observed at the LLZO grain boundaries of battery with Al interlayer. Raman and XPS results show that the Al 2 O 3 interlayer reacts with Li + during the charge and discharge process to form a Li-Al-O compound which is Li + conductive. It is concluded that the lithium dendrite inhibition mechanism of the Li-Al-O compound interlayer is that it can promote the Li + conduction from LLZO to lithium anode to undergo a lithium deposition reaction, and prevents electrons from conducting to LLZO and combine with Li + to occur lithium dendrite growth. While for the Al interlayer, electrons can reach LLZO through the interlayer to combine with Li + thus occurring the lithium dendritic growth.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Changyang Li,Peng Wang,Dun Zhang
The employment of intermediate layer technology to improve the mechanical stability of superhydrophobic coatings (SHCs) is an acknowledged tool, but the mechanism by which intermediate layers, especially different ones, affect superhydrophobic composite coatings is not clear. In this work, a series of SHCs based on the strengthening of the intermediate layer were fabricated by employing polymers with different elastic moduli such as polydimethylsiloxane (PDMS), polyurethane (PU), epoxy (EP) resin, as well as graphite/SiO2 hydrophobic components. Following that, the effect of different elastic modulus polymers as an intermediate layer on the durability of SHCs was investigated. From the perspective of elastic buffering, the strengthening mechanism of elastic polymer-based SHCs was clarified. Furthermore, from the perspective of self-lubrication, the wear resistance mechanism of self-lubricating hydrophobic components in the SHCs was elucidated. Also, the prepared coatings exhibited excellent acid and alkali resistance, self-cleaning, anti-stain, and corrosion resistance. This work confirms that low-elastic-modulus polymers can also play the role of buffering external impact energy by elastic deformation even as an intermediate layer, and provides theoretical guidance for the development of SHCs with robustness.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
PubMed
高影响因子
CARBON
·
2021
·
IF 9.594
Yin Zhang,Boya Wang,Peng Jing,Yi Guo,Yueying Zhang,Yunhong Wei,Qian Wang,Yun Zhang,Hao Wu
Introducing a freestanding functional interlayer has been a conventional tactic to immobilize the soluble polysulfide intermediate in Li–S batteries . However, most of the designed interlayers possess extra heavy weight, casting additional technical challenges toward practical high-specific-energy batteries. Herein, an ultralight self-standing interlayer with an extremely low mass loading (∼0.14 mg cm −2 ), composed of porous curly carbon fibers derived from natural biomass with inlaid cobalt electrocatalysts (CF–Co), was engineered via a convenient way. After replacing the poor conductivity sulfur (∼10 −28 S m −1 ) by higher conductivity selenium disulfide (SeS 2 , ∼10 −6 S m −1 ) as active cathode materials , the hierarchically porous-structured, conductive CF-Co interlayer with outstanding adsorptive and electrocatalytic effects is introduced into the resulted Li–SeS 2 batteries to capture dual-intermediate polysulfides/polyselenides, boost their conversion kinetics, and ensure favorable running of Li–SeS 2 cells with high SeS 2 loading and lean electrolyte. Consequently, the coin cells deliver outstanding high-rate capability (404 mAh g −1 at 8 A g −1 ) and superior cycling stability (∼81.5% areal capacity retention in 125 cycles) under high SeS 2 loading (5.0 mg cm −2 ). Significantly, practical high-areal-capacity (>5.5 mAh cm −2 ) Li–SeS 2 pouch cells can be realized by assembling this interlayer with double-side SeS 2 -loading cathodes (132 mg), working stably at relatively lower electrolyte condition (6.0 μL mg −1 ).
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Pu Zhao,Zhengwei Li,Zhiwu Xu,Xuesong Leng,Anqi Tong,Jiuchun Yan
The oxide layer on the surface has always been a key obstacle to achieving the diffusion bonding of Al alloys. It is a challenge for performing diffusion bonding without removing oxide layers. Herein, diffusion bonding of Al alloy retaining continuous oxide layers was successfully achieved in the air by a low-temperature and low-pressure diffusion bonding mothed using a Zn interlayer. During the bonding processes, conducted at 360 °C and 3 MPa, Zn diffused into Al through cracks of thin oxide layers to form the joint composed Al/(diffusion layer)/(oxide layer)/(Zn)/(oxide layer)/(diffusion layer)/Al. The diffusion layers were composed of Zn-Al eutectoid, and the oxide layer included nanocrystals and amorphous Al 2 O 3 . The shear strength of joints containing continuous oxide layers was about 30 MPa. Interestingly, the migration behavior toward the joint center of the interfacial oxide layers was observed with consuming of the Zn interlayer. The cracking phenomenon, the “subcutaneous diffusion” and the migration behavior of oxide layers were verified and analyzed by the diffusion bonding of anodized 6063Al-6063Al. Subsequently, the dynamic migration mechanism of oxide layers with elements diffusion and bonding interface strengths were discussed in detail. The ability to join Al alloys in the air at low temperatures and low pressure suggests a highly practical and economic method for diffusion bonding.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 19
·3912
·
IF 5
Chi Jiang,Mengmeng Zhang,Yingfei Hou
Positively charged nanofiltration (NF) membranes show great potential in the fields of water treatment and resource recovery. However, this kind of NF membrane usually suffers from relatively low water permeance. Herein, a positively charged NF membrane with a porous interlayer is developed, where the interlayer is formed by assembling dendritic mesoporous silica nanoparticles (DMSNs) after the formation of a polyamide layer. This post-assembly strategy avoids the adverse effect of the interlayer on the formation of positively charged NF membranes. The porous DMSN interlayer provides abundant connected channels for water transport, thus endowing the NF membrane with enhanced water permeance. A series of DMSNs with different sizes was synthesized, and their influence on membrane formation and membrane performance was systematically investigated. The optimized membrane exhibits a CaCl2rejection rate of 95.2% and a water flux of 133.6 L·h−1·m−2, which is 1.6 times that of the control group without an interlayer. This work represents an approach to the fabrication of a positively charged NF membrane with porous interlayers for high-efficiency cation rejection.Keywords:nanofiltration;thin-film composite membrane;interlayer;dendritic nanoparticle
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Junjing Li,Han Yu,Yongjiao Ding,Liang Wang
In order to improve the metal utilization of the noble metal Pd and the catalytic activity of the reaction, a novel and efficient Pd/Ti 4 O 7 /Ti electrode was prepared by introducing a Ti 4 O 7 intermediate layer for electrocatalytic hydrodechlorination (EHDC) of chlorinated pharmaceuticals and personal care products (PPCPs). The presence of oxygen vacancies (Ov) on the Ti 4 O 7 surface was confirmed by electron paramagnetic resonance (EPR). The results showed that the introduction of Ti 4 O 7 increased the electrochemical active surface area electrode (ECSA) of the Pd/Ti 4 O 7 /Ti electrode, accelerated the electron transfer rate on the catalyst surface, and promoted the generation of electron-rich Pd, which in turn improved the dechlorination efficiency. The Pd/Ti 4 O 7 /Ti electrode had a removal efficiency of 99.6% for florfenicol (FLO) within 180 min. Meanwhile, the removal efficiency of the Pd/Ti 4 O 7 /Ti electrode was still above 95% in seven cycles, which significantly improved the catalytic activity and stability compared with that of the Pd/Ti electrode. In addition, the reaction pathway for the electrocatalytic hydrodechlorination process of FLO at Pd/Ti 4 O 7 /Ti electrode was proposed. The ecotoxicity of the pollutants was also evaluated by the Toxicity Estimation Software Tool (T.E.S.T) model. In this study, an efficient electrocatalyst for EHDC was explored, and the Pd/Ti 4 O 7 /Ti electrode provided strong support for pollutant removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yingze Lei,Keying Feng,Ao Zeng,Hongran Yang,Long Zhang,Zhiyong Liu,Zheng Chen
In this work, a method was developed to modulate the nanostructure of PEDOT films by constructing a ZnO interfacial modification layer on a substrate. Scanning electron microscopy (SEM) results revealed that the PEDOT film electrodeposited on the ZnO interfacial modification substrate had larger pores and a more three-dimensional structure. The PEDOT film showed a good electrochromic effect, and the transmittance changed from 51.04 % initially to 43.2 % after 8000 s cycles in the three-electrode system, which maintains an initial transmittance of 84.05 %, reflecting a great improvement in stability compared with that of pure PEDOT, which maintains 42.45 % of the original transmittance. In addition, after cycling for 8000 s, the response time of the film decays very little (1.8 s for coloring and 1.9 s for bleaching to 2 s for coloring and 2.1 s for bleaching), which is a great improvement over that of pure PEDOT (1.6 s for coloring and 1.8 s for bleaching to 15 s for coloring and 16.1 s for bleaching). This method is simple and inexpensive and provides a new option for modulating the morphology and structure of conductive polymers, which is conducive to the development of the commercialization direction.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 28
·13638-13645
·
IF 7.76
Jing Liu,Lixia Yuan,Kai Yuan,Zhen Li,Zhangxiang Hao,Jingwei Xiang,Yunhui Huang
The ithium–sulfur battery stands as one of the most promising successors of traditional lithium-ion batteries due to its super high theoretical energy density, but practical application still suffers from the shuttle effect arising from soluble intermediate polysulfides. Here, we report SnO2 as a chemical adsorbent for polysulfides. As an interlayer between the cathode and separator, SnO2 gives better results to prevent the polysulfides from diffusing to the lithium anode than as a modifier of the carbon matrix directly. The lithium–sulfur battery with an SnO2 interlayer delivers an initial reversible capacity of 996 mA h g−1 and retains 832 mA h g−1 at the 100th discharge at 0.5 C, with a fading rate of only 0.19% per cycle. The improvements benefit from the quasi-open space provided by the interlayer configuration for the diffused sulfur species, which can largely relieve the loss of active substances caused by the volume effect during the lithiation/delithiation process.
研究领域:
材料科学
·
能源存储
✓ 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）