ADVANCED POWDER TECHNOLOGY
·
2020
·
IF 4.217
Heng Guo,Huihui Song,Linli Gan,Liangjun Xia,Dan Sheng,Yang Liu,Aming Wang,Jinbang Hu,Wen Zhang,Weilin Xu,Yunli Wang
In order to make better use of wool powder and explore the feasibility of replacing pigment with dyed wool powder, the dyeing behavior of wool powder was studied firstly. Then, we conducted a series of tests and analyses of the microcosmic structure and properties of powder before and after dyeing. BET test results revealed that the specific surface area of original powder was larger than that of dyed powder. TG and DMA tests indicated that the dyed powder had better thermal stability than the original powder. At last, the dyed wool powder and pigment were mixed and printed on cotton fabric. The dry/wet-rubbing fastness and moisture permeability of cotton fabric printed with dyed powder are better than those of cotton fabric printed with pigment. This indicates that the waste- wool fiber can be processed into applicable printing pigments, which is environmentally friendly and makes full use of natural resources.
研究领域:
纺织材料科学
·
环境友好材料
·
天然资源利用
·
印染技术
·
高分子材料
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 75
·期 12
·2800-2810
·
IF 1.197
Wu Shi-chuan,You Xia,Yang Cao,Cheng Jian-hua
MIL-68(Al), a powdered aluminum-based metal organic framework (MOF), was synthesized and used to explore its adsorption behavior toward methyl orange (MO). The adsorption isotherm, thermodynamics, kinetics, and some key operating factors as well as changes in the material's structure were investigated. The adsorption isotherm conformed to the Langmuir isotherm model and the maximum equilibrium adsorption capacity was 341.30 mg g −1 . Thermodynamic data demonstrated that the adsorption process was spontaneous, endothermic and showed positive entropy. For kinetics, the process of MO adsorption onto MIL-68(Al) was more suitably described by a pseudo-second-order model. Electrostatic and hydrogen-bonding interactions contributed to dye adsorption, with electrostatic interactions considered to be the principal binding force between adsorbent and adsorbate. Furthermore, MIL-68(Al) maintained a stable structure after adsorption. From these results, MIL-68(Al) was suggested here to be a stable MOF adsorbent for removing MO from aqueous solution.
研究领域:
环境化学
·
材料科学
·
物理化学
·
污染控制
·
吸附科学
✓ 已验证
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2015
·
IF 0.357
Tingting Li,Xuemei Yin,Xianmei Xie
The interactive laminated nanocomposite takovite/montmorillonite (TE/MMT) was simply synthesized by in-situ method. This inorganic nanomaterial was composed of TE layers and MMT layers, which acted as inorganic building blocks. Some characterization techniques reveal that the TE/MMT has great specific surface area, and its thermal stability is better than that of TE alone. This novel synthetic route is practical and environment-friendly.
研究领域:
无机化学
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材料科学
·
纳米科技
·
环境友好合成
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Shusheng Li,Rui Kuang,Xiangzheng Kong,Xiaoli Zhu,Xubao Jiang
Highly efficient and robust electrocatalysts have been in urgent demand for oxygen evolution reaction (OER). For this purpose, high-cost carbon materials , such as graphene and carbon nanotubes , have been used as supports to metal oxides to enhance their catalytic activity . We report here a new Co 3 O 4 -based catalyst with nitrogen-doped porous carbon material as the support, prepared by pyrolysis of porous polyurea (PU) with Co(NO 3 ) 2 immobilized on its surface. To this end, PU was first synthesized, without any additive, through a very simple one-step precipitation polymerization of toluene diisocyanate in a binary mixture of H 2 O-acetone at room temperature . By immersing PU in an aqueous solution of Co(NO 3 ) 2 at room temperature, a cobalt coordinated polymer composite , Co(NO 3 ) 2 /PU, was obtained, which was heated at 500 °C in air for 2 h to get a hybrid, Co 3 O 4 /NC, consisting of Co 3 O 4 nanocrystals and sp 2 -hybridized N-doped carbon. Using this Co 3 O 4 /NC as a catalyst in OER, a current density of 10 mA·cm −2 was readily achieved with a low overpotential of 293 mV with a Tafel slope of 87 mV·dec −1 , a high catalytic activity. This high performance was well retained after 1000 recycled uses, demonstrating its good durability. This work provides therefore a facile yet simple pathway to fabrication of a new transition metal oxides-based N-doped carbon catalyst for OER with high performance.
研究领域:
材料科学
·
电化学
·
催化化学
·
能源材料
·
纳米科技
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2012
·
IF 2.08
Chongwen Jiang,Aixian Su,Xuemei Li,Tao Zhou,Dewen He
A series of MCM-41 mesoporous molecular sieves with different Si/Al molar ratio has been synthesized by hydrothermal crystalline method using cetyltrimethylammonium bromide as structural template, sodium silicate as silica source and sodium aluminate as aluminum source in alkaline solution. The results show that all the samples have hexagonal mesoporous structure. The secondary restructured materials exhibit well defined structure and the long distance order of the mesopores . The mesoporous structure for Si/Al = 25 MCM-41 with high specific area can be maintained after hydrothermal stability test in boiling water more than 12 h, showing that the secondary restructure can enhance the hydrothermal stability of MCM-41 with the pore diameter size of larger than 3.3 nm and BET surface area of more than 800 m 2 ·g − 1 . Furthermore, MCM-41 with Si/Al = 25 has the optimal hydrothermal stability due to the introduction of Al atom.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
多孔材料
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yuankai Yang,Xudong Zhang,Zhiguo Tian,Guido Deissmann,Dirk Bosbach,Peng Liang,Moran Wang
Understanding of thermal effects on ion transport in porous media is very important for environmental applications. The movement of ions along a temperature gradient is named thermophoresis or thermodiffusion. In nanoporous media, where the interaction of ions with solid–liquid interfaces has a significant influence on their migration, the theoretical understanding of thermodiffusion is still incomplete. Herein, we present experimental results for the thermodiffusion of cations in saturated nanoporous silica by the through-diffusion method. Both the experimental data and theoretical analysis indicate that the temperature-induced polarization of surface charges strongly influences ionic transport. Stated simply, the electric field in a liquid electrolyte confined in nanopores changes when the applied temperature gradients are altered, thereby affecting the motion of the nanoconfined ionic species. By applying an external temperature field, the gradient of the surface charge density leads to the charged aqueous species exhibiting strong temperature gradient-dependent electrophoretic mobility. When the thickness of the electrical double layer is comparable to the size of the nanopores, the theory used herein indicates that this kind of nonisothermal ionic mobility is up to one order of magnitude larger than classical thermophoretic mobility. This study improves the understanding of the underlying mechanisms that govern the transport of ions in nanoporous media, which could set the stage for diffusional metamaterials induced by specific thermal fields.
研究领域:
物理化学
·
纳米科学与技术
·
电化学
·
环境科学
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
Energy Technology
·
2018
·Vol. 7
·期 4
·1800769
·
IF 3.175
Yijia Shao,Bin Huang,Zhiyuan Lu,Yanchen Liu,Xiangbo Meng,Li Du,Huiyu Song,Shijun Liao
A high-performance LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathode with a uniform pinecone-like morphology is reported, which is prepared by a solvothermal process, using urea to tune the pH of a mixed solvent of ethylene glycol and water, and a subsequent calcination process. The material has uniform, well-defined pinecone-like particles with lengths of 3–4 μm and widths of 1–2 μm. It exhibits a significantly enhanced cathodic performance in a Li-ion battery, with a reversible discharging capacity of up to 199 mAh g −1 when it is charged to 4.6 V at a charge/discharge rate of 0.2 C and of 159.2 mAh g −1 at a rate of 2 C. After 100 charge/discharge cycles, the capacity retention is 91%, demonstrating its superior capacity and stability in comparison with a sample prepared via the coprecipitation method. The cyclic voltammetry and electrochemical impendence spectroscopy results reveal that the pinecone-like LiNi 1/3 Co 1/3 Mn 1/3 O 2 material has markedly lower polarization and lower resistance to the migration of lithium ions than the coprecipitation sample. The material's high performance, especially its outstanding capacity at a high discharge rate and its significantly enhanced cyclability, makes the synthesized pinecone-like LiNi 1/3 Co 1/3 Mn 1/3 O 2 a promising high-performance cathode material for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米结构材料
✓ 已验证
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 10
·4825-4833
·
IF 2.394
Liu Jiuqing,Xi Yang,Li Qihou,Li Jie,Liu Meng,Wang Cheng,Hong Zikun,Song Feifei,Bai Lishun,Zeng Fanli
The high performance and safety of lithium-sulfur (Li-S) batteries are the focus of research in recent years. The separator is an important part of the battery, whose performance stability directly affects the performance of the battery. What’s more, there are still many defects in the commercial polyolefin separator. In this work, a polyethylene/polyetherimide (PE/PEI) composite separator is designed by surface coating and non-solvent-induced phase separation (NIPS) method. The film breakage temperature and anti-puncture strength of the PE/PEI composite separator (181.96 °C, 7.90 N) are higher than those of the commercial PE separator (153.00 °C, 6.20 N), which will greatly ensure the safety problems caused by internal self-heating and external short circuit of Li-S batteries. The PE/PEI composite separator–based Li-S battery delivers a high initial specific capacity of 1265 mAh g −1 at 0.2 C and exhibits excellent rate capability compared with the commercial PE separator. Therefore, the PE/PEI composite separator is a candidate separator for the high-performance and high-safety Li-S battery.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子材料
·
电池技术
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2017
·Vol. 1
·期 9
·1944-1949
·
IF 0
Sheng Huang,Chao Meng,Min Xiao,Shan Ren,Shuanjin Wang,Dongmei Han,Yuning Li,Yuezhong Meng
Tin phosphide (Sn4P3) combined with the good conductivity of tin (Sn) and high capacity of phosphorus has been reported to be a potential anode material for the sodium ion battery (SIB). However, the preparation of Sn4P3 is limited to ball-milling and compositing with carbon materials. The novel and detailed structure of Sn4P3 itself has so far not been revealed. In this research, the multi-shell Sn4P3 nano-structure was obtained, for the first time, using a simple and general low temperature solvothermal method. The multi-shell structure with a larger specific surface area and interlayer space endows this new anode material with a short cut pathway for sodium ion diffusion and a buffer space for volume expansion during sodiation, thus avoiding electrode pulverization and improving the cycling performance of the SIB. The as-prepared multi-shell Sn4P3 delivers an excellent specific capacity of 770 mAh g−1 with capacity retention of 96% after 50 cycles at the current density of 50 mA g−1, demonstrating the superiority of structure optimization in SIB anode preparation.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
✓ 已验证
DOI
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2024
·
IF 4.7
Chen LIANG,Bang TONG,Shi LI,Ze-sen WEI,Jin-hua SUN,Qing-song WANG
To reveal how the performance of LiNi x Co y Mn z O 2 (NCM) changes as a function of transition metal (TM) composition, the effect of TM ratio on the structure, morphology, electrochemical performance and thermal behavior of different NCMs was systematically investigated. Increasing Ni content leads to higher reversible capacity but worse rate capability and cycling stability. Inhibited kinetics of Li + and poor electronic conductivity cause major capacity loss in Ni-rich NCMs. Comparison of thermal behaviors was carried out via in-situ and ex-situ micro-calorimetry. With the decrease of Ni content, the thermal stability is significantly improved. The oxygen release related to phase transitions was evaluated based on Li residuals in delithiated NCMs, which verifies that Ni-rich materials exhibit severer structural deterioration, lower onset temperature and more heat release. Comprehensive characterization identifies that LiNi 0.5 Co 0.3 Mn 0.2 O 2 strikes a well-balanced combination of electrochemical performance and safety features.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
热分析
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Lingyan Wang,Linhai Zhuo,Yancun Yu,Fengyu Zhao
Two-dimensional (2D) SnS 2 nanoplates were synthesized through a facile hydrothermal method . The influences of reaction conditions such as temperature and pH on the size, crystallinity and the forming process of SnS 2 were investigated in detail. At low temperature (160 °C), the SnS 2 nanoplates showed poor crystallinity; while at higher temperatures above 200 °C, the crystallinity and thickness of the SnS 2 nanoplates tended to increase. In addition, pH had notable impact on the nucleation velocity of SnO 2 and the conversion speed from SnO 2 to SnS 2 in further as well. When used as anode materials in rechargeable lithium ion batteries , the SnS 2 nanoplates synthesized at 200 °C and pH = 10.5 (SnS 2 -200-10.5) showed the best lithium storage capacity, good cycling stability and excellent rate capability. It retained a high reversible capacity of 521 mA h g −1 over 50 cycles at a current of 100 mA g −1 , equal to 90.0% of the initial reversible capacity. In addition, the coulombic efficiency increased from 36% in the first cycle to over 97% in the subsequent cycles. Even at high current densities of 1, 2 and 3 A g −1 , the electrodes could still delivery as high as 472, 397 and 340 mA h g −1 , respectively. The enhanced electrochemical performance of the SnS 2 -200-10.5 can be attributed to the compact and regular crystal structure with a moderate thickness and crystallinity, which is beneficial for maintaining the stability of the structure and fast ion transport during lithiation/delithiation processes.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机功能材料
✓ 已验证
DOI
高影响因子
SURFACE ENGINEERING
·
2025
·
IF 2.6
Xiaobing Li,Ruijie Lu,Zhenping Wu,Jianfeng Chen
In this study, a multi-step synergistic process combining chemical etching, hydrothermal deposition and stearic acid modification was proposed for the corrosion protection needs of aluminium alloys in marine environments, and micro- and nano-composite superhydrophobic coatings (STZ) were successfully constructed on the surface of aluminium bases. Scanning electron microscopy, EDS, and XRD confirmed the presence of zinc oxide particles with micron-level rough structures on the coating surface. Contact angle testing showed a static contact angle of up to 156° and a rolling angle of less than 5°, which is consistent with superhydrophobic properties. Electrochemical tests showed that the corrosion current density of the STZ coating was three orders of magnitude lower than that of the untreated substrate, and the charge transfer resistance was significantly higher, confirming a significant increase in corrosion resistance. After 400 linear abrasion cycles, the coating retained 70% of its hydrophobic properties. In self-cleaning tests, the rate of contaminant adhesion was reduced by 75% compared to the untreated substrate.This process provides a feasible solution for the long-term protection of aluminium alloys in harsh environments.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
纳米材料
·
功能涂层
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）