DESALINATION
·
2013
·
IF 3.041
Mufang Li,Xiao Xue,Dong Wang,Ying Lu,Zhihong Wu,Hanzhi Zou
A novel high performance hydrophilic poly(vinyl alcohol- co -ethylene) (PVA- co -PE) nanofiber membrane for filtration media was prepared and characterized in this study. The PVA- co -PE nanofibers for the membrane preparation were fabricated based on a high throughput, cost effective and environmental friendly method developed by us. The basic properties of PVA- co -PE nanofibrous membrane and commercially available membrane (mixed cellulose ester membrane) including morphology, pore size distribution, contact angle, mechanics, water flux and filtration efficiency were investigated. The rejection rate of PVA- co -PE nanofibrous membrane (nanofiber density is 3 g/m 2 ) to TiO 2 suspension was above 99%, and such unique hydrophilic nanofibrous membrane exhibited a flux rate significantly higher than the commercial microfiltration membrane. The results indicated that PVA- co -PE nanofibrous membrane prepared by this method was a hydrophilic and high performance membrane which could be used in the microfiltration fields.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Dongyan Shen,Yong Liu,Guangxing Yang,Hao Yu,Peng-Fei Liu,Feng Peng
The electrooxidation of carbon monoxide is a typical example of structure sensitivity in electrocatalysis for fuel cells. Understanding the structure sensitivity is crucial in designing highly efficient catalysts and elucidating reaction mechanisms. Conventionally, only the reactivity of active sites was considered and optimized. However, how the reactant chemically moves to the active site has not been well studied. In this work, we found that CO ad hopping is a general phenomenon on noble metal surfaces such as platinum, iridium, rhodium, and palladium in the case of CO monolayer electrooxidation. Differences in the performances of CO ad stripping on platinum nanoparticles with different surface structures reveal that the CO ad hopping rate is structure sensitive as well. Assisted by a diffusion modeling and density functional theory calculations, it is demonstrated that the structure sensitivity is as a result of a compromise between CO ad chemical diffusivity and reactivity with OH ad .
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·Vol. 28
·期 8
·2515-2530
·
IF 2.6
Liu Cansen,Tai Xiaoming,Xu Jianyu,Xie Huisi,Li Jinyan
Rubber tire mold fouling is a severe problem leading to mold surface corrosion, tire defects, and extra energy consumption. Traditional mechanical and chemical cleaning is inefficient and induces mold surface damage. Low surface energy organic coating displays antiadhesive behavior but is susceptible to wear. Here, we develop a bioinspired Co-CeO 2 /MoS 2 coating with effective mechanical robustness, corrosion resistance, and antifouling behavior by leveraging a slippery liquid-infused surface (SLIPS) strategy. The micro-nanostructure of the coating serves as mechanical stability and anticorrosion skeleton with the infused lubricant acting as a slippery antifouling surface. The variation of microstructure, mechanical strength, corrosion resistance, and antifouling behavior of the coating with individual and synergistic addition of CeO 2 and MoS 2 is systematically characterized. The slippery Co-CeO 2 /MoS 2 coating shows excellent mechanical stiffness, corrosion resistance, and antifouling performances in rubber vulcanization conditions. Graphical abstract
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SURFACE REVIEW AND LETTERS
·
2020
·
IF 0.835
PENGHUI CAO,YUHUA YAN,XINLI TIAN,RUIZHUO OUYANG,YUQING MIAO
Oxygen evolution reaction (OER) is of great importance in splitting water. However, the sluggish OER kinetics at the anode severely hinders the H 2 evolution at the cathode which is a crucial procedure for energy storage. Herein, we report the synthesis of a new OER catalyst of Co(OH) x (WO 4 ) y via a one-step hydrothermal method, where the incorporation of WO 4 2 − as a condenser greatly enhanced the electrocatalytic activity of Co(OH) 2 toward OER. Moreover, the introduction of mesoporous carbon (MC) further improves the electrocatalytic performance of Co(OH) x (WO 4 ) y by forming the nanocomposites of Co(OH) x (WO 4 ) y /MC. The synergism between Co(OH) 2 and WO 4 2 − and the synergistic catalytic effect of Co(OH) x (WO 4 ) y and MC majorly contributed to the apparently enhanced electrocatalysis of Co(OH) x (WO 4 ) y /MC toward OER. This work provides an efficient strategy to improve the electrocatalytic activity of Co(OH) 2 by introducing WO 4 2 − and forming nanocomposites between Co(OH) x (WO 4 ) y and MC for low-cost, convenient and highly efficient water oxidation.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Le Han,Jiaqiang Liu,Peng Liu,Bohan Li,Xianliang Li,Yan Xu
Ratiometric fluorescent sensing materials based on dual-emissive luminescent centers have been widely researched due to their highly stable self-calibrating monitoring performance. In this work, Eu 3+ , Tb 3+ co-doped gadolinium molybdate [Gd 2 (MoO 4 ) 3 ] phosphors were successfully prepared through a facile precipitation and a following heat treatment process. Dual-emissive Gd 2 (MoO 4 ) 3 : Eu 3+ , Tb 3+ phosphor showed characteristic emission peaks at 592, 617, and 703 nm corresponding to the transitions of 5 D 0 – 7 F 1 , 5 D 0 – 7 F 2 and 5 D 0 – 7 F 4 for Eu 3+ ions, and the other emissions at 488 and 543 nm were ascribed to 5 D 4 – 7 F 6 and 5 D 4 – 7 F 5 transitions for Tb 3+ , respectively. The temperature sensitivities of Gd 2 (MoO 4 ) 3 : Eu 3+ , Tb 3+ based on a multimode fluorescence intensity ratio (FIR) technique were investigated for monitoring temperature changes in the range of 80–450 K. The maximum relative sensitivities of the four modes of FIR (I Tb 3+ /I Eu 3+ ) techniques were successfully achieved with range of 0.37–0.50% K −1 . The results also demonstrated the high reversibility of Gd 2 (MoO 4 ) 3 : Eu 3+ , Tb 3+ phosphor used as a self-calibrating thermometer for thermal-sensing application.
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高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Danfeng Wu,Sixu Liu,Mingqi Zhong,Jiafei Zhao,Congcong Du,Yanling Yang,Yifei Sun,Jingdong Lin,Shaolong Wan,Shuai Wang,Jianyu Huang,Yali Yao,Zhe Li,Haifeng Xiong
Metal single-atom catalysts (SACs) have attracted extensive interest because of their maximum atom efficiency and potentially good performances. However, the understanding of the catalytic behavior and the stability of SACs in high-temperature catalytic reactions remains a major challenge, especially under reducing conditions. In this work, we investigated the nature and stability of Rh/CeO2 SACs with different Rh loadings (0.2–4 wt % Rh) during syngas conversion (260 °C, 2 MPa). Using CO-DRIFTS, we found that atomically dispersed Rh was dispersed on Rh/CeO2 catalysts with an Rh loading up to 3 wt %. The Rh/CeO2 catalysts were stable in H2 up to 350 °C, while Rh nanoclusters were formed in CO at 200 °C. During syngas conversion at 260 °C, the Rh single atoms (Rhiso) on a 0.5 wt % Rh/CeO2 SAC slowly agglomerated to form Rh nanoclusters (RhNC) and a Rhiso/RhNC ratio of ∼1:2.5 was obtained after ∼10 h time-on-stream run. Furthermore, the Rhiso/RhNC ratio did not change with further reaction, indicating that the reaction reached steady state after a 10 h run. After the catalysts reached steady state (∼10 h), the Rhiso/RhNC ratio on the spent Rh/CeO2 catalysts decreased with the increase in Rh loadings, while the reactivity increased first and then decreased. We observed an optimal value of Rhiso/RhNC ≈ 1:3 on the 1 wt % Rh/CeO2 catalyst, showing the maximum reaction rates of CO (rCO) and ethanol selectivity (SEtOH) of 85.8 μmol/s/gRh and 26.2%, respectively. This indicated that the combination of Rh single atoms and Rh nanoclusters is beneficial to the ethanol selectivity and reaction rate, which was confirmed by DFT simulations. Moreover, the ratios of Rhiso/RhNC on the spent catalysts under the steady state have good relationships with the CO conversion rate and product selectivity in the reaction.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Si-Yuan Ye,Jia-Qian Wu,Bin-Bin Yu,Yi-Wei Hua,Zongsu Han,Zi-Yi He,Zheng Yan,Meng-Li Li,Yan Meng,Xuebo Cao
Basic requirements for advanced and practical supercapacitors need electrode materials with strong stability, high surface area, well-defined porosity, and enhanced capability of ion insertion and electron transfer. It is worth mentioning that the two-dimensional cluster-based Ni/Co–organic layer (Ni0.7Co0.3-CMOL) inherits high stability from the Kagóme lattice and shows excellent pseudocapacitance behavior. As an optimized atomic composition, this crystalline CMOL exhibits excellent performance and stability both in 1.0 M KOH and All-Solid-State Flexible Asymmetric Supercapacitor (ASCs). The specific capacitance values are 1211 and 394 F g–1 and the energy density is 54.67 Wh kg–1 at 1 A g–1. Good cycling stability is characterized by its capacitance retention, maintained at 92.4% after 5000 cycles in a three-electrode system and 90% after 2000 cycles at 20 A g–1 for assembled All-Solid-State Flexible ASCs. An in situ XRD technique was used in the three-electrode system, which showed that there was no signal of crystalline substance that affected the cyclic stability of the material while charging and discharging. These superior results prove that Ni0.7Co0.3-CMOL is a promising candidate for supercapacitor applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yi Wu,Junliang Chen,Jie Liu,Linjie Zhang,Reza Abazari,Ting-Ting Li,Jinjie Qian
The energy crisis heightens interest in proton exchange membrane fuel cells (PEMFCs), where the oxygen reduction reaction (ORR) is a critical cathodic process hindered by its intrinsic sluggish kinetics. Single-atom catalysts (SACs) at the molecular level, notably those featuring an Fe-N 4 structure derived from iron phthalocyanine (FePc), exhibit significant potential but confront the challenges of aggregation and inadequate electrical conductivity. Herein, we present a novel FePc coupled with defect-rich CoN x -doped hollow carbon nanostraw derived from cobalt-doped indium-based metal–organic frameworks (MOFs). This enhancement is attributed to the CoN x structure’s effective modulation of the Fe-N 4 active sites, further complemented by the hollow nanostraw structure, which significantly increases the accessibility of active sites, thereby promoting enhanced catalytic performance. FePc@HCoNC demonstrates exceptional ORR performance with an oxygen reduction potential of 0.903 V, half-wave potential of 0.914 V, and limiting current density of 5.18 mA cm −2 . For zinc-air batteries (ZABs), FePc@HCoNC achieves an open-circuit voltage of 1.524 V, peak power density of 153.06 mW cm −2 , specific capacity of 758.10 mAh g −1 , and stable cycling for 150 h. These findings underscore its potential as a superior alternative to precious metal-based catalysts, offering a pathway to more sustainable and efficient energy conversion technologies.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Shao Weipeng,Zhang Yi,Zhou Zhiwen,Li Na,Jiao Feng,Ling Yunjian,Li Yangsheng,Zhou Zeyu,Cao Yunjun,Liu Zhi,Pan Xiulian,Fu Qiang,Wöll Christof,Liu Ping,Bao Xinhe,Yang Fan
Ceria (CeO 2 ) is a widely used oxide catalyst, yet the nature of its active sites remains elusive. This study combines model and powder catalyst studies to elucidate the structure-activity relationships in ceria-catalyzed CO activation and hydrogenation. Well-defined ceria clusters are synthesized on planar CeO 2 (111) and exhibit dynamic and tunable ranges of Ce coordination numbers, which enhance their interaction with CO. Reduced ceria clusters (e.g., Ce 3 O 3 ) bind CO strongly and facilitate its dissociation, while near-stoichiometric clusters (e.g., Ce 3 O 7 ) adsorb CO weakly and promote oxidation via carbonate formation. Unlike planar ceria surfaces, supported ceria clusters exhibit dynamic properties and enhanced catalytic activity, that mimic those of powder ceria catalysts. Insight from model studies provide a method to quantify active sites on powder ceria and guide further optimization of ceria catalysts for syngas conversion. This work marks a leap toward model-guided catalyst design and highlights the importance of site-specific catalysis.
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高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 45
·31500-31507
·
IF 10.7
Yuying Wang,Fanjun Guo,Mengzhen Zhou,Qian Wu,Tao You,Zhengxiang Zhong,Jiankun Yang,Li Liu,Yudong Huang,Mingqiang Wang
Lithium metal batteries (LMBs) have been regarded as promising electrochemical energy storage systems due to the high theoretical specific capacity of metallic lithium. However, the uncontrolled growth of lithium dendrites, stemming from uneven lithium deposition, poses a significant challenge to their practical implementation. To tackle this issue, an ultra-thin composite separator, consisting of octamethacryloyloxy sesquioxane (MA–POSS), methacryloyloxy trimethoxysilane grafted holey graphene oxide (MPS–HGO), and aramid nanofibers (ANF), was prepared through a combination of phase transition-induced co-assembly and in situ polymerization techniques. Experiments indicate that the composite separator, with a thickness of only 3.8 μm, exhibits exceptional mechanical properties, specifically a tensile strength of 104 ± 5.1 MPa and a modulus of 3.23 ± 0.2 GPa, due to extensive hydrogen bonding and π–π interactions between the HGO sheets and ANF. Furthermore, benefiting from the synergistic effect of the abundant pores in MPS–HGO and the inhibition of stacking through the copolymerization of MPS–HGO and MA–POSS, the composite separator also demonstrates good electrolyte infiltration and a high lithium-ion transport number (tLi+ = 0.87), which not only acts as a physical obstacle but also efficiently regulates Li-ion transport to hinder irregular dendritic growth. The simultaneous regulation of Li-ion transport and mitigation of dendrite growth resulted in a long cycle life for Li|Li cells without dendrite deposition after 1500 cycles at a high current density of 5 mA cm−2. Moreover, the LiFePO4 (LFP)|Li battery with the composite separator displayed a capacity of 154 mA h g−1, a coulombic efficiency of 99%, and a high capacity retention of 99.6% after 250 cycles at 0.5C (85.7% after 1000 cycles at 2C). This work provides a promising new approach to fabricating high-performance lithium battery separators.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 24
·16557-16566
·
IF 2.993
Wu Jiahao,Huang Shaolong,Jin Zhengyuan,Chen Jiaqi,Hu Liang,Long Yaojia,Lu Jianguo,Ruan Shuangchen,Zeng Yu-Jia
Black phosphorus (BP), a phosphorus analog of graphene, is a two-dimensional material with the thickness-dependent bandgap and a high carrier mobility, which emerges as a promising material in nanoelectronics and optoelectronics. In this study, BP loaded with surface hydroxyl has been prepared by liquid ultrasonic exfoliation and used as the co-catalyst, which results in 341% photocatalytic hydrogen evolution enhancement to the anatase TiO 2 under the simulated sunlight irradiation and a quantum efficiency as high as 18.23% at 365 nm. The improved photocatalytic activity has been ascribed to the Z-scheme mechanism. These results indicate that 2D surface hydroxyl-loaded BP can be used as a broadband photocatalyst by forming type II heterostructures with other wide-bandgap semiconductors.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Jinghui Zhu,Ya Liu,Liubiao Zhong,Jianyong Wang,Huanhui Chen,Sanfei Zhao,Yejun Qiu
Herein, a novel composite nanofiber , which consists of TiO-TiO 2 heterostructure nanoparticles and boron, nitrogen co-doped carbon nanofibers (BNCNF), has been successfully prepared through a facile electrospinning method. Remarkably, as interlayer for Li S batteries, the TiO-TiO 2 heterostructure not only enhances the adsorbability of the interlayer to lithium polysulfides (LiPSs) via the Lewis acid-base interactions, but also accelerates the redox reaction kinetics of the Li S batteries dramatically. Moreover, the BNCNF as a flexible framework can remit the volumetric change of the sulfur cathode, physically retard the migration of LiPSs and chemically adsorb to the LiPSs. Attributing to the synergistic effect of TiO-TiO 2 nanoparticle and BNCNF membrane, the Li S batteries with the novel composite interlayer (named as TiO-TiO 2 /BNCNF) exhibit outstanding cycling stability and high discharge capacity, especially at high current density. With the sulfur loading of 2.5 mg cm −2 , the cell with the TiO-TiO 2 /BNCNF interlayer delivers a high initial discharge capacity of 1014.7 mA h g −1 with a decay rate of 0.092% over 400 cycles at 0.5C, and also possesses excellent initial discharge capacity of 650.0 mA h g −1 with a decay rate of 0.068% over 120 cycles even at 2.0C.
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高影响因子
危险品化学品经营许可证（带存储）