CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Huijuan Wang,Heping Cui,Xuejiao Wang,Chao Lin,Shuqin Xia,Khizar Hayat,Shahzad Hussain,Muhammad Usman Tahir,Xiaoming Zhang
To obtain chitosan (CTS) with narrower molecular weight distribution, CTS with weight-average molecular weight ( M W ) of 197.30 kDa was first metal complexed and then degraded into five CTSs with M W of 107.90, 56.48, 10.40, 5.67 (CTS-4) and 3.66 kDa. Decrease of M W did not cause a significant change in chemical structure of the residue CTS, but the crystal structure was transformed significantly. The moisture retention increased firstly and then decreased as the M W of CTS decreased. CTS-4 was superior to CTSs with other M W and propylene glycol in terms of the moisture retention. The lower water activity and increase of net isosteric heat were observed in CTS-4, which was due to the migration of immobilized water to a bound-state caused by mounting newly formed chain-end hydrophilic groups per unit weight. CTS-4 could effectively improve moisture retention, showing a potential to substitute commonly used humectant such as propylene glycol.
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2017
·
IF 6.844
Shanshan Liu,Xu Zhao,Yanbin Wang,Huixin Shao,Meng Qiao,Yan Wang,Shen Zhao
In this paper, a photoelectrocatalytic (PEC) system consisting of γ-Bi 2 MoO 6 anode and Co 3 O 4 loaded carbon fiber paper (Co 3 O 4 /CFP) cathode prepared by a hydrothermal method was established and used to degrade phenol . In order to enhance the PEC degradation efficiency of phenol, peroxymonosulfate (PMS) was introduced into this system. At an applied bias of 1.5 V, the removal efficiency of 10 mg/L phenol was increased from 6% to 100% with 2 mM PMS addition into the PEC process. The degradation rate constant of phenol was also increased to be 0.0496 min −1 . Effects of PMS concentration, applied bias and initial pH were investigated. Based on the ESR analysis, sulfate radicals (SO 4 − ) and hydroxyl radicals (HO ) were proved to be the dominant oxidizing species for phenol degradation in the combined system. The PMS was activated to generate SO 4 − by loaded Co 3 O 4 , in which photogenerated-electrons accelerated the cobalt cycle process on the cathode. As a result, Co leaching was largely inhibited. The stability of the PEC system for organics degradation was exhibited.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Qing Li,Wenjun Yan,Ye Liu,Haiyan Du,Zhongde Wang,Xiaogang Hao,Guoqing Guan
Transition-metal chalcogenides as the promising alternatives to noble-metal-based electrocatalysts for hydrogen evolution reaction (HER) with high activity and durability in water splitting have attracted extensive attention in recent years. Herein, Co z Ni y S x @PPy composites with three-dimensional (3D) cauliflower-like were firstly prepared on carbon fiber paper (CFP) via a simple and efficient electrochemical reduction of elemental sulfur in the precursor of S@PPy composite coated on CFP to react with Co and Ni ions in the electrolyte. The optimum electrode, i.e., Co z Ni y S x @PPy/CFP-6 (A-6) prepared by using an electrolyte with a Co/Ni molar ratio of 0/6, showed excellent catalytic activity (with an overpotential of 185 mV@10 mA cm −2 and a small Tafel slope of 78.13 mV dec −1 ) as well as long-term stability (at least 100 h) in 1 M KOH solutions. This work provides a novel way to fabricate effective and non-noble-metal electrodes for HER in water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Yang Yang,Ming Zhou,Wenlong Guo,Xun Cui,Yanhong Li,Feila Liu,Peng Xiao,Yunhuai Zhang
Water oxidation is a critical step in water splitting to make hydrogen fuel. We report a hybrid material consisting of NiCoO 2 nanowires grown on carbon fiber paper (denoted as NiCoO 2 @CFP) as a highly efficient oxygen evolution reaction (OER) electrocatalyst. In 0.1 M KOH, the highly nanostructured NiCoO 2 catalyst presents a small overpotential of ∼0.303 V at a current density of 10 mA cm −2 and a low Tafel slope of ∼57 mV dec −1 , comparable to the commercial precious RuO 2 catalyst. Such a good performance for OER may be attributed to the NaCl-type structure of the NiCoO 2 nanowires and CFP substrate, which can boost the formation of active Ni-Co layered hydroxide/oxyhydroxide species during the catalysis process. Additionally, the aligned 3D structure of NiCoO 2 @CFP plays an important role in the high catalytic activity for OER. These merits combined with the satisfactory stability of the hybrid material indicate that it is a promising material for water oxidation.
研究领域:
材料科学
·
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8636-8648
·
IF 2.324
Yuan Xiaofang,Tang Bin,Sui Yanwei,Huang Saifang,Qi Jiqiu,Pu Yuguang,Wei Fuxiang,He Yezeng,Meng Qingkun,Cao Peng
In this study, CuCo 2 S 4 directly grown on carbon fiber papers (CFP) were prepared by a low-cost hydrothermal method. We also studied the influence of two different sulfur sources on the morphology and performance of CuCo 2 S 4 . Compared to TAA as sulfur source, the performance and morphology of CuCo 2 S 4 by Na 2 S·9H 2 O are better. The CuCo 2 S 4 –Na 2 S nanotubes possess irregular diameters from 100 to 200 nm. An electrode made of the synthesized CuCo 2 S 4 –Na 2 S nanotubes/CFP composite exhibits a maximum specific capacitance of 456 F g −1 at 1 A g −1 and 83% of capacitance retention after 5000 cycles at 5 A g −1 . The synthesized CuCo 2 S 4 –Na 2 S/CFP is used to construct an all-solid-state asymmetric supercapacitor (ASC) as the positive electrode, while and the negative electrode is made of a Fe 2 O 3 /reduced graphene oxide (rGO) composite on Ni foam. This asymmetric device has delivered an energy density of 50 W h kg −1 and a power density of 700 W kg −1 at an operating voltage of 1.5 V. It retains a long cycling life—78.2% capacity retention ratio after 5000 cycles. This work demonstrates the feasibility of the CuCo 2 S 4 –Na 2 S nanotubes in the applications of high-performance supercapacitors.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2023
·
IF 8.9
Xueqi Wang,Kai Sun,Han Wang
Nucleic acid biomarkers play important roles in early diagnosis, routine management, and prognosis of diseases. However, current nucleic acid testing (NAT) approaches either require cumbersome instruments or lack sensitivity for short detection time, making point-of-care (POC) NAT challenging. Here, we report an ultrasensitive carbon fiber paper (CFP)-based electrochemical biosensor with one-step branched DNA (bDNA)-based molecular signal amplification system for rapid, sensitive, and low-cost replication-free NAT. For nucleic acid quantification, the proposed biosensor exhibits a wide linear range of 10 aM–1 μM and a low limit of detection (LOD) of 1.4 aM. For fast semi-quantitative detection, the biosensor can evaluate the concentration of nucleic acids within 10 min with a threshold as low as 1 fM. Furthermore, the biosensor demonstrates negligible batch-to-batch variation with a relative standard deviation (RSD) of 4.25% at the cost of less than $1/device. The present one-step bDNA-based electrochemical biosensor serves as a promising and universal method for rapid, sensitive, and portable NAT.
研究领域:
生物医学工程
·
分子诊断学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ao Zhang,Wei Wang,Ruopeng Cui,An Du,Jinsheng Jia,Yonggang Huang,Chunlei Wan,Ruina Ma
The preparation of multifunctional microwave absorbing materials with the characteristics of stronger absorption, wider bandwidth, lighter weight, higher strength and thinner thickness is an urgent research direction. Due to the difficulty of controllable distribution of absorbers, excellent microwave absorption performance is usually accompanied by large absorber amount and thickness, which can result in microwave absorption composite materials lack flexibility, mechanical properties, and adaptability to the environment. In this study, Ti 3 C 2 T x /Fe 3 O 4 /glass fiber paper composite was prepared by vacuum-assisted filtration. The controllable pore structure constructed by glass fiber enables uniform distribution of MXene/Fe 3 O 4 and effectively spreading of MXene monolayer film, enhancing conductivity loss and interface loss. By controlling the diameter of glass fiber, the pore size and the distribution of absorber can be regulated, thereby achieving a minimum reflection loss of up to −57.2 dB at an ultra-low filling ratio of 1.66 wt%. With the addition amount of 1.90 wt%, the effective absorption bandwidth can cover the whole X-band. The ultra-low specific reflection loss exceeds most of fabric materials and MXene-based absorbers. Meanwhile, the composite material exhibited excellent mechanical properties with a tensile strength of 3.054 kN/m and a burst resistance of 290 kPa. In addition, the adhesion between the filler and the glass fiber was increased by adding acrylic resin-based aqueous adhesive, and the surface grafting functional group (-F) made the composite material superhydrophobic. This work provides a new strategy to synthesize multifunctional absorbing material with low filling ratio and strong environmental practicality.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yajie Guo,Dong Guo,Feng Ye,Ke Wang,Zhongqi Shi,Xianjue Chen,Chuan Zhao
NiSe2 nanowire (NW) arrays grown on flexible carbon fiber paper (CFP) were synthesized, for the first time, through a novel thermal selenization method in vacuum instead of flowing inert gas. The ultrathin NiSe2 NWs uniformly cover the CFP, contributing to the large surface area and fast charge transportation. Desirably, this binder-free and hierarchical electrode shows favorable activity for hydrogen evolution reaction (HER). It only requires an overpotential of 172 mV to afford the current density of 100 mA cm–2 in 0.5 M H2SO4, corresponding to a low Tafel slope of 32.44 mV dec–1. After 1000 continuous cycles, the HER activity of NiSe2 NWs is well-maintained. Moreover, the current density remains unchanged in prolonged electrolysis, indicating an excellent durability of NiSe2 NWs. The novel preparation method described in this study could inspire future work on the synthesis of transition-metal dichalcogenides with high purity and ultrasmall nanostructure toward improved electrocatalytic activity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Wenhui Dang,Chengjun Dong,Zhifang Zhang,Gang Chen,Yude Wang,Hongtao Guan
MnO 2 was self-grown on carbon fiber paper (CFP) via a facile redox reaction , which is constructed by interconnected ultrathin nanosheets array. The CFP acts as both a supporting scaffold and a reducing agent for MnO 2 growth. The obtained MnO 2 /CFP composite was directly used as electrodes for supercapacitors , delivering a high specific capacitance of 713.7 F/g (0.5 A/g). Cyclic stability testing of the MnO 2 /CFP electrode reveals 86.8% retention in specific capacitance after 1200 cycles at 5.0 A/g. The nanosheet morphology of the MnO 2 on CFP brings about more efficient electroactive sites and facilitates the electrolyte penetration, allowing greater access for ions to active reaction sites. Hence, the attractive electrochemical performances exhibited by this MnO 2 /CFP electrode endow them potentially promising candidates for supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2019
·
IF 6.944
Wenxin Zhu,Yi Zhang,Jiandong Gong,Yiyue Ma,Jing Sun,Tao Li,Jianlong Wang
In this work, we introduce our recent finding that the carbon fiber paper (CFP) treated by simple air annealing (OCFP) could be used for exceptionally high-performance electrochemical nitrite sensing. The air-annealing process endows the pristine CFP with higher defective edge/plane sites, more oxygen-containing functional groups, higher roughness, and improved wettability. The electrochemical studies show that the OCFP exhibits excellent sensing performance for nitrite, with an ultralow determination limit of 0.1 μM and a detection limit of 0.07 μM, an ultrawide linear determination range of 0.1–3838.5 μM, a fast current response of 1 s, and a high sensitivity of 930.4 μA mM–1 cm–2. These performance values are comparable or even superior to those for most reported noble- or transition-metal-based advanced nitrite sensors. Besides, this electrode also presents satisfactory stability, reproducibility, and feasibility of nitrite sensing in food samples. As an ideal monolithic and metal-free catalyst with ultrahigh and stable detection performance, the OCFP has a high potential to be integrated into next-generation electrochemical sensing devices.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Lan Sun,Tao Wang,Long Zhang,Yunjin Sun,Kewei Xu,Zhengfei Dai,Fei Ma
The rational design and preparation of earth-abundant, stable and efficient electrocatalysts for hydrogen production is currently the subject in extensive scientific and technological researches toward the future of a clean-energy society. Herein, a mace-like MoS 2 /NiCo 2 S 4 hierarchical structure is designed and synthesized on carbon fiber paper via a facile hydrothermal method , and evaluated as electrocatalyst for hydrogen evolution reaction . In the MoS 2 /NiCo 2 S 4 /carbon fiber paper hierarchical structures, MoS 2 nanosheets are dispersively distributed on the surface of NiCo 2 S 4 nanowires, which provides an enlarged surface area , abundant interfaces and catalytic active sites. As for hydrogen evolution reaction , such MoS 2 /NiCo 2 S 4 /carbon fiber paper heterostructures give rise to a hydrogen evolution reaction catalytic current density of 10 mA cm −2 with a lower overpotential of 139 mV and a smaller Tafel slope of 37 mV·dec −1 than those of MoS 2 /carbon fiber paper and NiCo 2 S 4 /carbon fiber paper counterparts, exhibiting a prominent electrocatalytic performance. Moreover, the electrocatalytic properties change little after 5000 CV cycles and continual electrolysis for 12 h without obvious decay, respectively, demonstrating high durability and stability. The excellent hydrogen evolution reaction performances endow the hierarchical configuration MoS 2 /NiCo 2 S 4 /carbon fiber paper with promising alternative in HER and other related renewable energy fields.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 2
·1-12
·
IF 2.4
Wang Xiuxiu,Zhao Jiawei,Zhao Chuanjun,Zhang Yexin,Mahmud Sakil,Zhang Jian
The catalytic removal of trace formaldehyde (HCHO) at ambient temperatures is crucial for improving indoor air quality, necessitating the use of monolithic catalysts over traditional powder forms for real-world applications. In this study, an aluminosilicate fiber-woven ceramic filter paper (CFP) was selected as the substrate, onto which a Mn 2 O 3 catalyst was in situ coated via a combustion method utilizing Mn(NO 3 ) 2 as the oxidant and glycine as the fuel. The resulting monolithic Mn 2 O 3 /CFP catalyst was compared to a MnO 2 /CFP catalyst, prepared by direct decomposition of Mn(NO 3 ) 2 on the same substrate. The Mn 2 O 3 /CFP catalyst exhibited superior characteristics for HCHO oxidation, including a more porous architecture, higher redox capability, and an abundance of surface-active oxygen species with enhanced mobility of surface lattice oxygen. These features enabled the Mn 2 O 3 /CFP catalyst to achieve significantly higher HCHO conversion at room temperature (90%) compared to the MnO 2 /CFP catalyst (21%). Additionally, in a durability test carried out in a mode of dynamic flow at room temperature, the Mn 2 O 3 /CFP catalyst maintained a high HCHO conversion rate of 66% over 11 days, demonstrating its potential for practical indoor air purification applications. Graphical abstract
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
危险品化学品经营许可证（带存储）