Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 23
·12429-12437
·
IF 14.511
Shuang Li,Yunxiang Hou,Di Li,Bo Zou,Qingtang Zhang,Yang Cao,Guodong Tang
SnSe is considered one of the most intriguing new thermoelectric materials. Polycrystalline SnSe offers a wide range of thermoelectric applications due to its facile synthetic processing and machinability. Herein, we have achieved a high average ZT of 0.8 as well as a high peak ZT of 1.86 in solution-synthesized porous Zn and Ga codoped SnSe nanosheets, generating a maximum energy conversion efficiency of 13.3%. High-density micro/nanopores are induced in the SnSe matrix, which are more effective for scattering phonons and reducing the thermal conductivity. The high density of micro/nanopores, nanosheet structure and dislocations contribute to an ultralow lattice thermal conductivity (0.157 W m−1 K−1 at 873 K). Meanwhile, Ga incorporation can induce band convergence and create resonance levels, producing a large Seebeck coefficient. Ga and Zn codoping contributes to a sharp increase in carrier concentration and an obviously increased electrical conductivity. The enhanced Seebeck coefficient and increased carrier concentration help in achieving a significant enhancement of the power factor over a wide temperature range in the porous Zn and Ga codoped SnSe nanosheets. Consequently, high thermoelectric performance is realized over a wide temperature range via the decoupling of electron–phonon transport in SnSe. This work opens up a great opportunity for designing prospective materials for thermoelectric applications with the aid of the solution synthesis route.
研究领域:
材料科学
·
凝聚态物理
·
纳米科技
·
能源材料
·
半导体物理
·
热电转换
·
无机功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Jianwei Bai,Xiaofei Ma,Cen Gong,Yiming Chen,Huijun Yan,Kewei Wang,Jun Wang
Traditional adsorption resin prepared by a low efficiency method has a low porosity and surface area , which limits the adsorption performance of the resin. Therefore, a novel porous resin was developed by structural design of the resins through post- modification with HPA and a post-crosslinked method. The novel porous post-modification resin was successfully prepared by the multistep method. Meanwhile, the high surface area and abundant micropores in HCR-AO can improve the adsorption rate by accelerating the diffusion of uranium in the external diffusion stage. The removal capacity of HCR-AO increased 366% for HCR and 120% for PSD-AO at the same initial concentration. HCR-AO takes less time to reach equilibrium than PSD-AO and HCR. Excitingly, the adsorption amount of the material dropped only slightly even after 8 cycles. The short equilibrium time and outstanding removal efficiency makes it a novel candidate for further extraction of U (VI) from seawater .
研究领域:
环境化学
·
核化学
·
材料科学
·
吸附分离
·
海洋资源提取
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Xianqiang Yin,Yanji Jiang,Yuehui Tan,Xiangmin Meng,Huimin Sun,Nong Wang
The ability to predict the transport of heavy metal ions in porous media with different surface characteristics is crucial to protect groundwater quality and public health. In this study, the effects of graphene oxide (GO) on co-transport and remobilization of Pb 2+ and Cd 2+ in humic acid (HA), smectite , kaolinite , and ferrihydrite-coated sand media were evaluated via laboratory packed-column experiments. Scanning electron microscope and energy dispersive X-ray analysis showed that the surface morphology of the coated sands was quite different and that ∼56.7–89.9% of the surface was covered by the coating and the major elemental components were C, O, Si, Al, and Fe. GO exhibited high mobility in HA, kaolinite , and smectite-coated sand, but showed high retention in ferrihydrite-coated sand. While GO reduced the transport of Pb 2+ and Cd 2+ , both metal ions also reduced the mobility of GO in coated-sand columns. Elution experiments revealed that GO led to the remobilization and release of the previously sorbed Pb 2+ and Cd 2+ from the coated sand. However, GO could not release Pb 2+ and Cd 2+ from smectite-coated sand columns, probably because smectite has stronger adsorption affinity to the heavy metals than GO. Derjaguin-Landau-Verwey-Overbeek calculations were employed and explained the GO transport behavior in the columns well. Furthermore, the advection-dispersion-reaction equation simulated the cotransport of Pb 2+ and Cd 2+ with GO in the coated sand well. These results are expected to provide insight into the potential impact of coexisting nanomaterials with contaminants in vulnerable soil and groundwater systems.
研究领域:
环境地球化学
·
土壤学
·
水文地质学
·
纳米毒理学
·
环境污染与修复
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 117
·96862-96869
·
IF 3.84
Zhijie Gong,Qixing Wu,Fang Wang,Xu Li,Xianping Fan,Hui Yang,Zhongkuan Luo
Increasing the sulfur loading in the cathode of a lithium–sulfur battery is an important way to improve its capacity for practical applications. To achieve this, the present work proposes using PEDOT-PSS to encapsulate sulfur/carbon black (S/BP) by a facile solution mixing method and the formed composite is then coated on a porous carbon paper. It is believed that the formation of a core/shell structure in the PEDOT@S/BP composite can promote the electron transport and effectively impede the diffusion of polysulfides, and the porous carbon paper is able to retain the electrolyte containing the dissolved polysulfides in the cathode and alleviate the adverse effect of sulfur volumetric expansion. Due to such advantages, the proposed cathode, with a high sulfur loading of 3 mg cm−2, can yield a high reversible capacity of 1041 mA h g−1 and an excellent cycle stability with a capacity retention of 868 mA h g−1 after 100 cycles and an average coulombic efficiency of 99.4%.
研究领域:
电化学
·
能源材料
·
纳米复合材料
·
电池技术
·
功能高分子材料
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Zhe Zhang,Lei Xu,Yani Liu,Runtian Feng,Tong Zou,Yuanshuo Zhang,Yuru Kang,Pengxin Zhou
In order to improve the efficiency of the removal of methylene blue from wastewater, we synthesized activated carbon by thermally activating phosphoric acid-treated mangosteen peels. This activated carbon possessed a great specific surface area (1832 m 2 /g) and exhibited excellent adsorption capacity (871.49 mg/g) for methylene blue. In this study, we varied the impregnation ratios, activation temperatures, and activation time to determine the best conditions for preparing the mangosteen peel activated carbon (MPAC). The optimal conditions included a 1:3 impregnation ratio with activation for 60 min at 450 °C. We characterized the MPAC using a scanning electron microscope, powder X-ray diffraction, thermogravimetric analysis , differential scanning calorimetry , and Fourier transform infrared spectroscopy together with the Brunauer–Emmett–Teller approach. The adsorption experiment results conformed to the pseudo-second-order kinetic model and the Langmuir isotherm model. This proved that physical adsorption dominates in this adsorption process . The synthesized MPAC-5 showed great adsorption performance for a variety of dye wastewater. After three times of recycling, the removal rate of methylene blue is still above 40%. Compared with other biowastes, mangosteen peel has the potential to be synthesized into activated carbon with a high adsorption capacity for dyes.
研究领域:
环境科学
·
材料科学
·
化学工程
·
污染控制
·
吸附技术
·
废物资源化
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 17
·52018
·
IF 3.125
Xianggui Zhang,Xianglong Li,Antuo Wang,Bin Yang,Teng Hou,Yishen Lu,Jing Zhou
The separation of stable oil/water emulsions is an urgent global issue. In this work, a porous and superhydrophobic polytetrafluoroethylene (PTFE) fibrous membrane was obtained by first centrifugal spinning PTFE/potato starch fibers and then heat treating the fibers to remove the starch. Results showed that spherical protrusions and irregular striped protrusions appeared on the surface of the prepared PTFE fibers, which significantly increased the roughness and hydrophobicity of the fibrous membrane. In addition, number density and shapes of these protrusions could be tuned by changing the extent of the heat treatment and the potato amylose content during the fiber preparation. The water contact angle on the structured PTFE membranes was as high as 160°, and the water sliding angle was as low as 3.4°. The results of oil/water separation experiments showed that the oil removal rate reached 99.5% based a permeability of 3670 L/m 2 /h, which suggested that the obtained PTFE fibrous membrane has great potential for use in oil/water emulsions separation.
研究领域:
材料科学
·
环境工程
·
膜分离技术
·
表面科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Mengyi Wang,Li Yin,Mingqi Li,Shaohua Luo,Chao Wang
To develop low-cost, high-capacity and long-life anode materials for lithium-ion batteries, glucose-C and F-doped C coated SiO composites with adjustable pore structure (p-SiO@gl-C@F-doped C) are synthesized by facile and scalable methods. The combination of the heterogeneous dual-carbon shells and porous structure significantly promotes the reaction kinetics of the electrode, effectively suppresses and buffers the volume expansion of SiO, and largely enhances the stability of solid electrolyte interface of the electrode. In a half cell, the optimized p-SiO@gl-C@F-doped C (7:3) composite shows a stable discharge capacity of 785 mAh g −1 at a current density of 200 mA g −1 . The discharge capacity is maintained at 772 mAh g −1 after 200 cycles. At a current density of 400 mA g −1 , the electrode shows a discharge capacity of 633 mAh g −1 after 500 cycles, with a capacity degradation of ∼0.0096% per cycle from the 2nd cycle to the 500th cycle. The full cell which is composed of the commercial LiFePO 4 as a cathode and the optimized composite as an anode, exhibits high capacity and good cycling stability.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米复合材料
·
电池技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Weiguo Wang,Rongkai Du,Changzhi Dong,Jinwu Yan,Lei Zhang
A sensitive enzyme-linked immunosorbent assay (ELISA) has been developed based on the dual catalysis of dendritic Pd-Pt porous nanoparticles and horseradish peroxidase (HRP). The Pd-Pt porous nanoparticles, for the first time, were used to immobilize HRP. As a proof-of-concept demonstration, HRP functioned Pd-Pt porous nanoparticles were applied in hCG detection with a detection limit of 0.07 IU L −1 . The linear intervals is 0.1–6.4 IU L -1 . The Pd-Pt-HRP possesses a better sensitivity than the traditional BA-ELISA. Furthermore, the precision and reproducibility and selectivity were assessed to be eligible for the hCG monitoring.
研究领域:
生物化学
·
医学诊断
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Wei Teng,Nan Bai,Zehan Chen,Junming Shi,Jianwei Fan,Wei-xian Zhang
Porous carbon is the most important and most common adsorbent for the separation and treatment of organic pollutants. Characteristics such as accessible and large surface area, physical and chemical stability, and low-cost manufacturing method are desired for any adsorbent. Herein, a hierarchically porous carbon (HPC) was prepared by pyrolysis and graphitization of crystalline metal–organic frameworks (MOF-5) for enhanced adsorption of aromatic contaminants. The material treated at high temperature (950 °C) possesses large surface area (1512 m 2 /g), high porosity (0.94 cm 3 /g), and hierarchically porous structures. The generated mesopores around 4 nm improve the interconnectivity of micro- and macropores to make the porous material ideal for sorption of organic pollutants such as aromatic hydrocarbons. Effects of adsorbent dose, pH, ionic strength, contact time, and initial concentration on the adsorption of p -nitrophenol (PNP, as a model) were investigated. Adsorption isotherms and kinetics suggest that the adsorption is a spontaneous and endothermic physisorption process with monolayer surface coverage. The surface sites are electron-rich due to the graphitic layer, which has high affinity toward π electrons of the aromatic ring. The adsorption capacity of the hierarchically porous carbon (HPC) is nearly over 100% higher that of conventional activated carbon.
研究领域:
环境科学
·
材料科学
·
物理化学
·
吸附分离
·
污染治理
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2018
·Vol. 304
·期 1
·1800477
·
IF 2.69
Ziqiang Xu,Wenlei Li,Zhi Chen,Dongxia Wang,Tingting Feng,Hanna Potapenko,Mengqiang Wu
A novel porous membrane of chemically modified polyvinyl butyral (mPVB), with improved thermal properties and chemical stability for lithium ion battery applications, is successfully synthesized by utilizing the chain extension reaction of the OH units from PVB. The porous mPVB membranes are obtained via the tape casting and phase inversion method. The corresponding gel polymer electrolyte (GPE) is achieved by immersing the as-prepared membranes in the liquid electrolyte. The electrochemical performances of the GPE show that the mPVB membranes have the features of good uniformity, high porosity ( ≈ 90%), great thermal stability, and high mechanical strength. Moreover, the GPE exhibits good chemical stability, a wide electrochemical window, as well as high ionic conductivity ( ≈ 1.21 × 10 −3 S cm −1 ). A test of a Li/GPE/LiFePO 4 battery cell shows a capacity of 147.7 mAh g −1 and excellent cycling stability, demonstrating the great potential of the mPVB-based GPE for lithium ion battery applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 11
·4943-4947
·
IF 2.961
Li Ze,Li Yonghua,Xie Huan,Zuo Zhaoyang,Chu Peng
As a kind of anode materials, iron matrix oxide cannot be widely used in the lithium-ion batteries due to their poor electrical conductivity and huge volume change during the electrochemical cycles. Herein, the porous carbon@Fe 2 O 3 composites are prepared by hydrothermal method. Due to the porous structure and introduction of carbon, the electrical conductivity can be greatly improved. Additionally, the porous structure could buffer the volume change during electrochemical cycles. As a result, the as-prepared carbon@Fe 2 O 3 composites deliver a high initial specific capacity of 1168 mAh/g at 0.1 C. Moreover, the carbon@Fe 2 O 3 composites show outstanding rate performance and superior cycling stability. This work provides a potential anode material for high electrochemical performance Li-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能复合材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 12
·17056-17067
·
IF 4.672
Tao Lyu,Shiying Lin,Lanlan Mo,Feijun Wang,Ziqiang Shao
Summary Natural polyelectrolyte complex has designable structure, unique advantages of composite and strong intermolecular or intramolecular force without chemical cross-linking agents, showing the advantages of good biodegradability and low toxicity. This work reports an application research of natural polyelectrolyte in energy storage device. A multi-doped hierarchically porous carbon is fabricated from polyelectrolyte of sodium lignosulfonate and chitosan and used as electrode material of supercapacitor. The material characterization reveals its large specific surface area of 1768 m 2 g −1 , pore volume of 0.94 cm 3 g −1 with optimum 3D porous structure, and high heteroatom (oxygen, nitrogen, and sulfur) concentration. Benefit from these, the electrodes it made exhibit 354 F g −1 specific capacitance at 1 A g −1 current density, outstanding rate retention of 82.9% at a testing environment of 20 A g −1 , and 97.8% capacitance retention in 3 M KOH electrolyte after 10 000 cycles. Using this material, all-solid symmetric supercapacitor devices show 30.11 Wh kg −1 energy density at 520.88 W kg −1 power density and retains 20.90 Wh kg −1 at 1.03 kW kg −1 . These remarkable electrochemical performances prove the promising porous carbon in this work as electrode material with excellent performance for supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
·
碳材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）