JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 48
·46892
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IF 1.901
H.L. Guan,D.L. Yong,M.X. Fan,X.L. Yu,Z. Wang,J.J. Liu,J.B. Li
The superabsorbent resin (SAR) containing sodium humate (SH) has been synthesized by free-radical graft copolymerization with acrylic acid, 2-acrylamido-2-methylpropane sulfonic acid, and SH as monomers in aqueous solution, using N,N ′-methylenebisacrylamide as crosslinking reagent and potassium persulfate as initiator. The structure and morphology of the as-prepared SARs were fully characterized by Fourier transform infrared , scanning electron microscopy and thermogravimetric analysis, respectively. Meanwhile, the effects of crosslinking reagent, initiator, SH, and neutralization degree on the water absorbency of SAR were studied. The results showed that the adding of SH in the SAR enhanced the salt-tolerating and moisture-resisting capacities obviously. The SAR without SH [poly(acrylic acid) (PAA)/2-acrylamido-2-methyl-1-propanesulfonic (AMPS)] showed a maximum water absorbency of 600 g g −1 in distilled water and 60 g g −1 in 0.9 wt % NaCl solution, while SAR modified by SH (PAA/AMPS/SH) exhibited the maximum water absorbency of 1380 g g −1 in distilled water and 117 g g −1 in 0.9 wt % NaCl solution. Furthermore, the moisture-resisting capacity of PAA/AMPS/SH decreases to 8 wt % compared with PAA/AMPS. PAA/AMPS/SH also has better water absorbency in different cation solutions. The results indicated that the introduction of SH could enhance the performance of SAR obviously. The possible reasons with this enhancement were also investigated. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46892.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaogang Guo,Taotao Liang,A. Segun Giwa
Development of the structural, anti-wetting and exothermic stability of composite metal based-energetic composite is still a great challenge, especially used in complex environments (e.g. moisture circumstances). Thus, this paper firstly proposed electrophoretic controlled assembly (ECA) technique and facile modification process to construct the multifunctional nano-Al based NiO/perfluorosilane energetic composite films with even distribution of nanoscale particles and triple (a: microstructure, b: anti-wetting and c: exothermic performance) stability of for three years. The ECA dynamics study of Al/NiO particles was deeply explored as a “controlled bridge” to adjusting the reaction ratio of Al to NiO in product. The target film displays an outstanding high water contact angle of 171 ± 1° with an almost perfect sphere of droplet placed on that surface, and shows a small fluctuation of anti-wetting ability after immersed and exposure tests. In addition, the total heat output (Q) of product can reach up to ~2.5 kJ/g with a low activation energy of 247.624 kJ/mol, and shows ultra-long exothermic stability for three years. The realization of target film highly compatible with microelectromechanical systems (MEMS) here will largely improve the safety level of propellant or detonator system.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
THIN SOLID FILMS
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2023
·
IF 2.1
Tingting Wang,Longhua Li,Zhaolu Yin,Shaoyong Chen,Junli Wang
Semiconductor-sensitized TiO 2 thin films have been widely applied in optoelectronic devices. Here we prepared narrow bandgap (∼1.77 eV) selenium (Se)-sensitized TiO 2 thin films by spin-coating of Se inks onto a TiO 2 mesoporous layer, which forms a p-Se/n-TiO 2 heterojunction interface and holds promise for self-driven visible-light detection and sensing. Under irradiation by simulated sunlight and monochromatic visible-light, the resultant films exhibit large on-off switch ratio, fast response speed, and high spectral responsivity and detectivity at zero bias. Meantime, the p-Se/n-TiO 2 films show notable photoresponse stability and can maintain 92% and 64% of photocurrent of the pristine device after 2-month air storage and 72 h water soaking, respectively. Such good oxygen and moisture resistance of Se/TiO 2 thin films would be promising as applied in environmentally-stable heterojunction optoelectronic devices.
研究领域:
材料科学
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光电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 12
·1835
·
IF 5.3
Min Zhang,Jinzhu Zhang
In this paper, the heterostructure of MoS2/WS2was prepared by a hydrothermal method; the n-n heterostructure was demonstrated using TEM combined with Mott-Schottky analysis. The valence and conduction band positions were further identified by the XPS valence band spectra. The NH3-sensing properties were assessed at room temperature by changing the mass ratio of the MoS2and WS2components. The 50 wt%-MoS2/WS2sample exhibited the best performance, with a peak response of 23643% to NH3at a concentration of 500 ppm, a minimum detection limit of 20 ppm, and a fast recovery time of 2.6 s. Furthermore, the composites-based sensors demonstrated an excellent humidity immune property with less than one order of magnitude in the humidity range of 11–95% RH, revealing the practical application value of these sensors. These results suggest that the MoS2/WS2heterojunction is an intriguing candidate for fabricating NH3sensors.Keywords:MoS2/WS2;anti-humidity;ammonia sensing properties;heterojunction
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yuhong Zhang,Yanchang Liu,Junlong Liu,Zhihao Qu,Siye Tian,Hang Liu
Here, Ce-doped ZnO flower-like nanosheets are prepared by one-step hydrothermal method . The sensor based on Ce–ZnO composite exhibits excellent gas-sensing properties to acetone. Compared with pure ZnO, the response of Ce–ZnO composite is increased by 5.5 times, and the optimum operating temperature is reduced by 60 °C. The gas-sensing properties of the sensor to acetone under different humidity conditions are investigated. The redox reaction of Ce element increases the anti-humidity of Ce–ZnO sensor. Finally, the gas sensing mechanism of Ce–ZnO nanomaterial and anti-humidity principle are discussed in detail. The result can provide a new material for develop high sensitivity acetone sensor and a new anti-humidity strategy for designing gas sensing materials.
研究领域:
材料科学
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传感技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 33
·10247-10256
·
IF 6.641
Wei-Hsiang Chen,Linlin Qiu,Pengyun Zhang,Pei-Cheng Jiang,Pingfan Du,Lixin Song,Jie Xiong,Frank Ko
To significantly increase the applicability of inverted-planar flexible perovskite solar cells (PSCs), the achievement of high electrical conductivity, excellent moisture resistance and reproducibility of a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transport layer with simple fabrication (low cost and ease of mass manufacture) during spin-coating is the goal pursued by researchers. Herein, for the first time, we propose a facile strategy of cryo-controlled quasi-congealing spin-coating to improve the PEDOT:PSS quality to a new extent. The congealed surface and strengthened hydrogen-bonds between solvent and PSS chains can effectively suppress the moisture corrosion during spin-coating. In addition, the electrical conductivity of PEDOT:PSS can be further enhanced owing to the uniformity of PEDOT:PSS grains and a greater co-solvent effect facilitated by induced Young's modulus during spin-coating. A considerably smooth and uniform film with improved conductivity can be achieved even when fabricated in a high humidity environment. Furthermore, this smooth and passivated PEDOT:PSS can facilitate highly crystalline perovskite and better interfacial contact between them, which not only enhances the efficiency, but also greatly improves repeated mechanical deformation stability of PSCs. As a result, the power conversion efficiency (PCE) of rigid and flexible PSCs can be improved to 17.65% and 15.13%, respectively. Both devices show about 14% enhancement in PCE compared to the conventional one.
研究领域:
材料科学
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能源技术
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纳米技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 21
·15039-15047
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IF 3.9
Zhixiang Deng,Zhixuan Wu,Xinkuan Liu,Zhengai Chen,Yan Sun,Ning Dai,Meiying Ge
The influence of ambient humidity on the gas-sensing characteristics of metal oxide semiconductors has been one of the greatest obstacles for gas-sensing applications. In this paper, the pure WO3 and CeO2-modified WO3 nanocubes were prepared by a simple hydrothermal method, and their gas-sensing characteristics in dry and humid atmospheres were investigated. The results show that CeO2/WO3 demonstrated excellent gas-sensing properties toward H2S with high sensitivity and high selectivity at 115 °C. Noteworthy, the humidity independence of the CeO2/WO3 increased compared to the WO3. The response retentions over the whole humidity range of the CeO2/WO3-6 and CeO2/WO3-15 sensors were 70.3, and 76%, respectively, which were much higher than the WO3 sensor (17.9%). The gas-sensing mechanism of CeO2-modified WO3 is discussed based on the gas sensitivity properties. The obtained results provide a promising route to enhance the anti-humidity properties of metal oxide semiconductor gas sensors.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 39
·91262-91275
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IF 5.8
Cheng Tangying,Li Jinjin,Ma Xiuwei,Yang Linjun,Zhou Lei,Wu Hao
Various materials have been developed to capture volatile organic compounds (VOCs) to mitigate air pollution. However, sorbent materials with excellent resistance to water are rare. Here, several Fe/N-doped activated carbons (ACs) have been prepared to capture VOCs in humid environments. The ACs were analyzed by various characterization techniques, such as BET, SEM, XPS, XRD, FTIR, and Raman. The results showed that Fe/N doping resulted in the specific surface area of the ACs increasing by 500 to 1000 m 2 g −1 , the average pore size increasing to approximately 2 nm, improved mesoporous structure, higher graphitization, lower hydrophilicity, and polarity. The VOCs adsorption performance of the ACs was evaluated by static and dynamic adsorption experiments. The uptake of toluene and ethyl acetate by ACs was enhanced to 224 mg g −1 and 135 mg g −1 , respectively. And ACs were able to maintain 70 to 80% VOCs adsorption capacity for VOCs at 80% relative humidity. Furthermore, the microscopic mechanisms were investigated by the grand canonical Monte Carlo method (GCMC). The highly graphitized structure and the N functional groups favored the VOC adsorption process and discouraged the adsorption of water vapor. This work affirmed the dominance of Fe/N-doped carbon, which will contribute to the evolution of water-resistant VOCs adsorbent materials. Graphical Abstract
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liyong Du,Guoli Yang,Yi Liu
The research on the synthesis of three-dimensional (3D) porous structures has garnered significant interest among scholars. In this study, ZnSnO 3 /ZnO heterostructures are prepared using butterfly wings as biotemplates, resulting in the formation of a hierarchical porous network structure characterized by regular ridges and pillars. Subsequently, we construct a resistive gas sensor utilizing these ZnSnO 3 /ZnO heterostructures, which exhibits not only a relatively high responses (14.7) but also rapid response and recovery speed (1 s/6 s) when exposed to 100 ppm n-propanol at 220 °C. Furthermore, the sensor demonstrates a low limit of detection (LOD) of 432 ppb, strong repeatability, good long-term stability (80 days), and excellent anti-humidity properties (S 84 % /S 33 % ≈ 0.84). The enhanced gas sensing performance is primarily attributed to the formation of ZnSnO 3 /ZnO n-n heterostructures, the increase in oxygen vacancies, and the presence of ordered open porous structures. Consequently, ZnSnO 3 /ZnO heterostructures show significant potential for the detection of n-propanol gas in practical applications. This work also presents a promising strategy for the development of homogeneous/heterogeneous materials with a 3D open porous structure, which can be applied in surface-related fields.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
ACS Applied Engineering Materials
·
2023
·
IF 0
Wenjuan Zhang,Zhanqiang Li,Zijian Zhou,Fan Yang,Zhaoli Liu,Liyan Xue,Heng Chen,Yong Zheng
Negative thermal expansion (NTE) has been an attractive topic in engineering application and functional materials. However, the narrow operating-temperature window and the hygroscopicity have become bottlenecks restricting the NTE behavior. In this work, a design strategy for effectively ameliorating the NTE property, rare-earth based high-entropy (Y0.2Yb0.2Er0.2Tm0.2A0.2)2Mo3O12 (A = Sc, Gd, Lu) (HE-RE2Mo3O12) ceramics, is demonstrated for the first time. The as-synthesized HE-RE2Mo3O12 ceramics exhibit an orthorhombic crystal structure with a uniform distribution of rare-earth elements. Furthermore, the coefficients of thermal expansion (CTEs) of (Y0.2Yb0.2Er0.2Tm0.2Sc0.2)2Mo3O12 and (Y0.2Yb0.2Er0.2Tm0.2Lu0.2)2Mo3O12 ceramics are −4.96 × 10–6 K–1 and −4.58 × 10–6 K–1 with high service temperatures (100–800 °C). Fascinatingly, the large ionic radius Gd(III) is incorporated into the orthorhombic (Y0.2Yb0.2Er0.2Tm0.2Gd0.2)2Mo3O12 ceramic, and a lower negative thermal expansion property (−0.76 × 10–6 K–1) with broad operating-temperature window (100–800 °C) is achieved. Remarkably, the antihygroscopicity ability of the high-entropy specimens is improved, and the water absorption of such ceramics is reduced by 61.4%. Moreover, the improvements of the tunable thermal expansion and antihygroscopicity property of HE-RE2Mo3O12 ceramics are ascribed to the lattice distortion effect. The present study provides a promising strategy for the development of NTE functional materials.
研究领域:
材料科学
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无机化学
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固态物理学
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热工学
✓ 已验证
DOI
LANGMUIR
·
2023
·
IF 3.9
Jiao Yan,Li Wang,Chunxia Zhao,Dong Xiang,Hui Li,Jingjuan Lai,Bin Wang,Zhenyu Li,Hongsheng Lu,Hongwei Zhou,Yuanpeng Wu
Wearable strain sensors of conductive hydrogels have very broad application prospects in electronic skins and human–machine interfaces. However, conductive hydrogels suffer from unstable signal transmission due to environmental humidity and inherent shortcomings of their materials. Herein, we introduce a novel moisture-proof conductive hydrogel with high toughness (2.89 MJ m–3), mechanical strength (1.00 MPa), and high moisture-proof sensing performance by using dopamine-functionalized gold nanoparticles as conductive fillers into carboxymethyl guar gum and acrylamide. Moreover, the hydrogel can realize real-time monitoring of major and subtle human movements with good sensitivity and repeatability. In addition, the hydrogel-assembled strain sensor exhibits stable sensing signals after being left for 1 h, and the relative resistance change rate under different strains (25–300%) shows no obvious noise signal up to 99% relative humidity. Notably, the wearable strain sensing is suitable for wearable sensor devices with high relative humidity.
研究领域:
材料科学
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生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jiayi Qu,Yujun Guo,Xingtai Chen,Hongsen Xie,Shuheng Ding,Haoyun Zhao,Xiaoning Wang,Davoud Dastan,Xi-Tao Yin,Xiaoguang Ma
This paper reports the first hydrothermal synthesis of Nd-doped (1–4 mol%) CdS gas sensor materials. After gas sensitivity testing, it was found that sensors doped with 3 mol% performed best in detecting n-butanol gas at 275 °C: the response to 100 ppm n-butanol reached 127 (approximately 3.34 times that of pure CdS), Compared with common VOC gases in daily life, the sensor has good selectivity for n-butanol, with an extremely fast recovery time (3 s). It also demonstrated extremely high detection accuracy (R² = 0.96857) across a concentration range of 10–300 ppm n-butanol, along with excellent humidity resistance and long-term stability. Characterization of the material was conducted using XRD (X-ray diffraction), SEM (scanning electron microscope), TEM (transmission electron microscope), and XPS (X-ray photoelectron spectroscopy), revealing the following reasons for the enhanced gas-sensing performance: 1. Nd³ ⁺ doping causes lattice distortion, forming a highly active region around the sulfur vacancy and enhancing the gas-vacancy electron exchange efficiency. 2. Lattice distortion inhibits grain growth (≈26.85 nm), providing more gas adsorption/reaction sites and significantly improving the response value. reaction sites, significantly improving the response value. 3. Nd³ ⁺ reduces the adsorption energy of n-butanol, promoting gas adsorption/reaction processes while accelerating desorption. This paper provides materials with practical application value for sensors used in n-butanol detection.
研究领域:
材料科学
·
化学传感器
·
纳米技术
·
气体传感
·
分析化学
✓ 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）