JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Zhenlian Yang,Yangyi Gu,Baoling Yuan,Yuanmeng Tian,Jin Shang,Daniel C.W. Tsang,Mingxian Liu,Lihua Gan,Shun Mao,Liangchun Li
Covalent triazine frameworks (CTFs) as a kind of covalent organic framework (COF) materials show great potential for practical application by virtue of their high stability and facile large-scale synthesis. In this work, we developed three CTFs (MSCTF-1, MSCTF-2, and xSCTF-2) of different pore size decorated with S-groups using different functionalization methods for achieving selective Hg 2+ removal from aqueous solutions. The material structures were comprehensively studied by gas adsorption, IR and XPS, etc. Among them, the MSCTF-2 with 24.45% S content showed the highest Hg 2+ adsorption capacity of 840.5 mg g ‒1 , while MSCTF-1 exhibiting much larger distribution coefficient of 1.67 × 10 8 mL g ‒1 renders an exceptionally high efficiency for reducing the concentration of Hg 2+ contaminated water to less than 0.03 μg L ‒1 . Moreover, the MSCTFs show distinct features of: (i) high selectivity toward Hg 2+ over various transition metal ions; (ii) high stability over a wide pH range from pH 1 to 12; and (iii) good recyclability with 94% of Hg 2+ removal over five consecutive cycles. The Hg 2+ adsorption on functionalized CTFs followed pseudo-second-order kinetics and Langmuir isotherm. Our results revealed the material structure-performance relationship that the adsorption capacities depend on the binding site density whereas the distribution coefficient is essential to the removal efficiency.
研究领域:
环境化学
·
材料科学
·
吸附分离
·
功能材料
·
环境污染治理
✓ 已验证
DOI
高影响因子
CARBON
·
2015
·
IF 6.196
Yuanqin Chang,Fei Hong,Jinxin Liu,Minsui Xie,Qianling Zhang,Chuanxin He,Hanben Niu,Jianhong Liu
Ordered mesoporous carbon (OMC) was synthesized by nano-casting method using novel fluidic precursor – acrylonitrile telomer (ANT). By the penetration of mesoporous silica template with pure ANT, followed by the stabilization, carbonization and removal of the template, we obtained highly ordered mesoporous carbon rods (specific area 408 m 2 g −1 ). When an acetone solution of ANT (66 and 33 wt.%) was used instead of pure ANT, carbon materials with mesopore ranging from 2 to 7 nm were obtained (specific area 843 and 1012 m 2 g −1 respectively). Both nitrogen and sulfur atoms were doped into mesoporous carbon with 4 and 0.6 at.% using nitrogen containing monomer and sulfur containing chain transfer agent, without involving complicated synthetic technique and poisonous gaseous compounds. This method was proved to be a facile way to synthesize nitrogen and sulfur containing OMC with partially controllable pore distribution and morphology. More importantly, due to unique mesopore structure and heteroatom doping, Pt nano-particles deposited on the OMCs showed electrocatalytic activity as high as 508 mA mg −1 Pt in methanol oxidation which is 1.7-fold of activity of Pt deposited on commercial Vulcan carbon black.
研究领域:
材料化学
·
电化学
·
纳米催化
·
能源材料
·
物理化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Tingting Jiang,Yi Wang,Kun Wang,Yeru Liang,Dingcai Wu,Panagiotis Tsiakaras,Shuqin Song
Despite nitrogen doped carbon (N C) materials as metal-free electrocatalysts for oxygen reduction reaction (ORR) have shown desirable performance, the state-of-the-art of N C materials is still far from satisfaction for practical fuel cell applications. In the present work, sulfur (S) and nitrogen (N) dual doped ordered mesoporous carbon (SN-OMC) materials are for the first time successfully obtained by the aid of a convenient method under the same conditions, using polythiophene (PTh) and polypyrrole (PPy) as the precursors, ordered mesoporous silica (SBA-15) as the hard template, and FeCl 3 as the catalyst. The preparation conditions of the adopted method are gentle and easy to control and regulate. The experimental results have demonstrated that the obtained materials possess high ordering degree, large specific surface area and adjustable sulfur and nitrogen contents. It is found that the S 1 N 5 -OMC (the PTh/PPy feeding volume ratio is 0.5:2.5) exhibits excellent ORR electrocatalytic activity in alkaline media with desirable current density, methanol tolerance and long-term stability. Such excellent performance could be attributed to the synergistic effect between S and N, the high density of catalytic sites for ORR provided by high S-N heteroatoms loading, and the excellent mass transfer benefiting from ordered mesoporous pore structure. The present investigation provides a new approach to prepare S and N dual doped mesoporous carbons, which show great potential to be applied as fuel cell cathode electrocatalysts.
研究领域:
材料科学
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电化学
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能源材料
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纳米科技
·
催化化学
✓ 已验证
DOI
高影响因子
Materials Today Sustainability
·
2024
·
IF 7.1
Yuanmei Xu,Xueshi Li,Xiatong Wang,Qijia Weng,Weijun Sun
The main issues encountered in aqueous zinc-ion batteries (ZIBs) include corrosion and passivation of the zinc anode , electrolyte decomposition leading to hydrogen evolution , and dissolution consumption of cathode materials . This study proposes the use of ammonium persulfate (APS) as an electrolyte additive to enhance battery performance. The addition of APS not only adjusts the solvation structure of Zn 2+ , reduces water activity, but also allows NH 4+ ions to preferentially adsorb onto the surface of the zinc electrode, forming a protective layer and achieving dendrite-free zinc anodes. Results indicate that the inclusion of APS additive in the electrolyte can increase the specific capacity of zinc-ion batteries from 321 mAh g −1 to 418 mAh g −1 . Additionally, batteries with APS exhibit superior stability. Under low current density , the battery lifespan can reach 2100 h and a coulombic efficiency can up to 99.6%. This study delves into the design of multifunctional electrolyte additives and provides valuable insights for the development of practical ZIBs.
研究领域:
电化学
·
能源材料
·
储能技术
·
电池化学
·
界面化学
✓ 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
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
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 44
·16413-16420
·
IF 4
Hankun Tan,Lei Zhang,Kaiyue Gao,Li Sun,Yihe Zhang,Feng Xie
2H phase MoS2 with a two-dimensional nanostructure, high chemical stability and large theoretical capacity has been considered as a potential anode material for lithium-ion batteries. However, some practical problems hinder the direct use of 2H-MoS2 for lithium storage, such as its volume expansion effect that leads to capacity loss and its semiconductor properties that cannot provide sufficient conductivity. Herein, the surface of an MXene with abundant surface groups was modified with CTAB to promote its ability to adsorb MoO42− anions, and then 2H-MoS2 with a few layers was directly grown on the surface of MXene sheets vertically. Thanks to the conductive MXene sheets and the vertically-supported high-capacity MoS2 on them, the as-obtained composite MXene@MoS2 offers enhanced performance in specific capacity, long cycling stability and high rate capability. A reversible specific capacity of 1198 mA h g−1 was retained after 100 cycles at 200 mA g−1 and a specific capacity of 717 mA h g−1 was exhibited at 8000 mA g−1.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
半导体材料
✓ 已验证
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 9
·3034-3045
·
IF 8.8
Ning Xue-Er,Jia Dian-Zeng,Li Shan-Hao,Khan Muhammad Farooq,Hao Ai-Ze
A highly efficient piezocatalyst of oxygen-incorporated MoS 2 (O-MoS 2 ) was designed and successfully synthesized via facile modulation of hydrothermal process temperature method. Remarkably, a superior piezocatalytic H 2 evolution rate of 46.1 μmol·g −1 ·h −1 in pure water and 921.0 μmol·g −1 ·h −1 in methanol solution is obtained on optimal O-MoS 2 -180 (with a hydrothermal process temperature of 180 °C), outperforming pristine MoS 2 and most of the reported other catalysts. Moreover, piezocatalytic activity of O-MoS 2 toward the degradation of organic pollutants depends on hydrothermal temperatures. The suitable temperature of O-MoS 2 -180 presents dramatically excellent piezocatalytic capacity compared with the pristine MoS 2 for degradation of methylene blue (MB) dye. The reaction rate constant of O-MoS 2 -180 reaches to 54.6 × 10 −3 min −1 , which is nearly 18 and 4-folds in contrast with pristine MoS 2 and O-MoS 2 -140 (with a hydrothermal process temperature of 140 °C), respectively. Simultaneously, it also manifests that O-MoS 2 -180 endows relatively high degradation efficiency (84.6% within 30 min) and excellent stability. Moreover, it is also demonstrated that optimal O-MoS 2 can dramatically promote charge carriers transport and separation. Furthermore, our theoretical calculation results suggest that the oxygen-incorporated can modulate the surface electronic state, enhance active sites as well as optimize the hydrogen adsorption Gibbs free energy of MoS 2 , thus extremely boosting piezocatalytic efficiency. Ultimately, an innovative piezocatalytic mechanism is proposed to reveal and expound the relationship between piezocatalytic property and oxygen-incorporated role. Graphical abstract
研究领域:
材料科学
·
环境科学
·
物理化学
·
纳米催化
·
能源材料
·
表面科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 11
·17156-17163
·
IF 0
Zhu Meng,Zhu Jinglin,Peng Juanjuan,Zhang Bingliang,Liu Shaomin
Phosphonates have received a widespread attention in wastewater treatment due to their potential threat to the water environment. Advanced oxidation processes (AOPs) are feasible methods to degrade phosphonates, and most of the coexisting substances in water show a negative factor during their oxidation. However, the effect of bromide (Br − ) on the degradation of phosphonates in peroxymonosulfate (PMS) activation is still unclear. Herein, using 1-hydroxyethane 1,1-diphosphonic acid (HEDP) as a target phosphonate, Br − could remarkably enhance the degradation of HEDP in PMS activation compared to the PMS alone. Under the condition of pH = 7.0, the optimal degradation efficiency of HEDP is 84.8% in the PMS/Br − process after 30-min reaction, whereas no significant oxidation is obtained in the PMS/I − and PMS/Cl − processes. Multiple experiments (i.e., electron paramagnetic resonance (EPR), radical quenching experiments and chemical probs) confirm that free bromine, SO 4 •− and HO• paly a minor role in HEDP removal, and bromine radical species make a dominant responsible for HEDP oxidation. Additionally, NO 3 − , SO 4 2− , Cl − , and HCO 3 − have a little effect on the degradation of HEDP, but the HEDP removal is greatly inhibited in the presence of humic acid (HA). However, the degradation efficiency of HEDP using PMS/Br − process in river and sewage is a much higher than UV/persulfate (PDS) and UV/H 2 O 2 processes. This study provides a new sight into the effect of Br − on the degradation phosphonates in PMS activation process.
研究领域:
环境化学
·
水处理
·
化学工程
·
环境科学
✓ 已验证
DOI
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Jiaying Zhang,Zhendong Yao,Wenzhen Zou,Qiang Shen,Meiqiang Fan,Tingli Ma
Transition trimetallic sulfide NiCoMn–S attracts great attention due to its high specific capacity for hybrid supercapacitors , as well as Ti 3 C 2 is considered essentially as a potential new electrode material with iconic two-dimensional layered structure and excellent conductivity. Herein, NiCoMn–S nanoparticles are composited with two-dimensional layered Ti 3 C 2 via simple one-step hydrothermal method , which is first applied as positive electrode in hybrid supercapacitors (HSCs). A large number of NiCoMn–S nanoparticles distribute on the surface of Ti 3 C 2 and even insert into the Ti 3 C 2 layers, providing abundant electrochemical active sites for redox reaction and enhancing the mechanical stability for composites. Moreover, the NiCoMn–S/Ti 3 C 2 composites show lower charge-transfer resistance than pure NiCoMn–S, illustrating that the two-dimensional layered structure of Ti 3 C 2 improve the conductivity and supply additional electronic channels for ion transportation. The NiCoMn–S/Ti 3 C 2 -3.4% delivers a specific capacity of 347.1 C g −1 at a specific density of 1 A g −1 , which is 28% higher than that of pure NiCoMn–S (270.2 C g −1 at 1 A g −1 ). Finally, a hybrid supercapacitor (HSC) is assembled by using NiCoMn–S/Ti 3 C 2 -3.4% as positive electrode and RGO as negative electrode, realizing a specific capacity of 164.3 C g −1 at 1 A g −1 and high specific energy of 16.2 Wh kg −1 at a specific power of 15 kW kg −1 .
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
FUEL
·
2014
·
IF 3.406
Wenqing Li,Liying Wang,Yu Qiao,Jian-Ying Lin,Meijun Wang,Liping Chang
Understanding the effect of the atmosphere on the release of alkali and alkaline-earth metals (AAEM) during oxy-fuel combustion is important for the development of oxy-fuel combustion technologies with reduced problems with particulate formation and corrosion. To this end, we examined the release behavior of AAEM during oxy-fuel combustion in different gas environments. A drop-tube reactor and ion chromatography were used to investigate the release rates of AAEM. Our results show that the release rates of Na and K were higher than those of Ca and Mg in all types of gas environments. Experimental conditions that favor combustion, namely, higher temperature, higher oxygen content, and longer residence time, markedly increased the release rates of Na and K, whereas changes in the release rates of Ca and Mg were much smaller. The presence of SO 2 in the atmosphere suppressed the release of AAEM via formation of sulfates, whereas the presence of H 2 O promoted it. A synergistic effect of H 2 O and SO 2 on the release of AAEM during oxy-fuel combustion was observed.
研究领域:
燃烧化学
·
能源工程
·
环境化学
·
材料腐蚀
·
颗粒物形成
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Wenyuan He,Xuejun Zheng,Jinfeng Peng,Qiang Zhang,Dazhao Pei,Xinyang Yan
A facile one-step solid-phase synthesis strategy is developed for synthesizing a binder-free molybdenum disulfide/carbon fibers paper (MoS 2 /CFP) anode. The microstructure, composition, morphology and electrochemical performances were investigated. It is found that the thin MoS 2 layers are well anchored on the interlaced carbon fibers to form MoS 2 /CFP, which has mesoporous structure and large specific surface area of ∼18.8 m 2 g -1 . As a result, the obtained MoS 2 /CFP anode exhibits a reversible capacity of 261 mAh·g −1 with 31.2% loading ratio of MoS 2 . After subtracting the capacity of CFP, the MoS 2 in the composite anode delivers a reversible capacity of 539 mAh·g −1 and shows better cycle stability than commercial MoS 2 after 100 cycles at 100 mA g −1 . The remarkable electrochemical performances could be attributed to the buffer space among carbon fibers for the volume changes of MoS 2 as well as the highly conductive carbon fibers network, suggesting that the MoS 2 /CFP is a promising binder-free anode for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）