JOURNAL OF FLUORINE CHEMISTRY
·
2021
·
IF 2.05
Tao Zhang,Huihui Liu,Jingyu Shuai,Ziru Gao,Qingfeng Dong,Guannan Wang,Yabo Xiong,Qing Zhu,Houbin Li
The energetic polymeric binders play a key role in the solid propellants, and it create an important need for the development of the energetic binder performance. In this work, we developed a strategy for obtaining a novel fluorine-containing copolymer P(FPO/NIMMO) by the cationic ring-opening polymerization of 2-(2,2,3,3-tetrafluoro-propoxymethyl)-oxirane (FPO) and 3-nitratomethyl-3-methyloxetane (NIMMO). The chemical structure of P(FPO/NIMMO) was systemically characterized by Fourier transform infrared (FT-IR), 1 H and 13 C nuclear magnetic resonance ( 1 H NMR and 13 C NMR), and gel permeation chromatography (GPC). Thermogravimetric analysis (TGA-DTG) was utilized to evaluate the thermal stability of (FPO/NIMMO) and the result showed that the sharp weight loss temperature was at 215.7 °C. In comparison with PNIMMO, the P(FPO/NIMMO) had a lower glass transition temperature (T g ) of -42.7 °C detecting by the differential scanning calorimetry (DSC), indicating that it developed the better stability performance. This new strategy is devised for the utility of P(FPO/NIMMO) copolymer , enabling their extension to be potential energetic binder for solid propellants.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Jie Peng,Xiaoyu Pan,Peng Fei Hou,Bo Li
The pyroelectric-piezoelectric dual-mode sensor simultaneously decodes temperature and strain, serving as a core component for health monitoring, human-machine interfaces, and bionic skin applications. To achieve high fidelity, self-powering, and long-term endurance, the sensing materials must balance sensitivity, stability, and multi-physics field coordination across multiple scales. This study employs a synergistic strategy combining barium titanate (BaTiO3) doping with proton irradiation to regulate polyvinylidene fluoride-trifluoroethylene copolymer (P(VDF-TrFE)). By enhancing crystallinity and β-phase content of P(VDF-TrFE) while introducing oxygen vacancies and lattice distortions within the BaTiO3 lattice, the strategy significantly strengthens interfacial polarization coupling and charge transport efficiency. As a result, doping with 2wt% BaTiO3 increases pyroelectric coefficient (p) to 66.1 μC/m2•K. Although piezoelectric coefficient (d33) slightly decreases from 22.0 pC/N to 20.1 pC/N, its variation range (standard deviation) narrows from 3.9 to 3.1. Subsequent proton irradiation at 1×1010 p/cm2 further increases p to 86.6 μC/m2•K, accompanied by a slight decrease in d33. At 5×1010 p/cm2 fluence, p maintains a 6.8% increase compare to pre-irradiation levels, and d33 recovers to 20.0 pC/N with a standard deviation reduced to 2.4, effectively balancing piezoelectric uniformity and stability with high pyroelectric sensitivity. The composite film exhibits a linear sensitivity of 1.2 V/K over a temperature range of 0.1-12.2 K, with no degradation observed after 103 thermal cycles. It conformally adheres to the human body and enables real-time analysis of respiration, pulse, and touch signals, offering a novel approach for high-sensitivity, high-reliability dual-mode sensing in wearable electronics and bionic skin applications.
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 92
·89821-89826
·
IF 3.289
Xinyu Wang,Defeng Xing,Nanqi Ren
The biocathode bioelectrochemical system (bioc-BES) was used for p-nitrophenol (PNP) degradation with sodium bicarbonate as the carbon source. The PNP degradation efficiency in bioc-BES with applied voltage of 0.5 V reached 96.1% ± 0.5% within 72 h, which was much higher than that obtained in the biocathode BES without applied voltage (bioc-BES-NAP), open circuit biocathode BES (OC-bioc-BES) or abiotic cathode BES (abioc-BES). With the increase in the PNP concentration from 20 mg L−1 to 60 mg L−1, the PNP concentration of the effluent decreased from 21.66 ± 2.94 mg L−1 to 0.38 ± 0.1 mg L−1 in 48 h. The final reductive product of PNP was p-aminophenol (PAP) in the biocathode chamber. High-throughput 454 pyrosequencing showed that predominant populations in the biocathode biofilm of bioc-BES were affiliated with electrochemically active Delftia and Diaphorobacter, while Aminobacter was the predominant population in the biocathode biofilm of the bioc-BES-NAP and OC-bioc-BES. These results suggested that microbial electrocatalysis and electrochemically active bacteria on the cathodic electrode accelerated PNP degradation in the biocathode BES (bioc-BES). The biocathode BES will be a promising treatment technology for PNP-containing wastewater.
研究领域:
环境微生物学
·
环境工程
·
生物电化学
·
污染物降解
·
废水处理
·
微生物生态学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 16
·11563-11568
·
IF 2.019
Sun Xinjie,Tong Hua,Yuan Xiao,Liu Cui,Yuan Shuanglong,Chen Guorong,Yang Yunxia
Thermal boron diffusion, which forms highly doped and shallow p-emitters on phosphor-doped silicon wafers, is one of the primary processes in commercial-scale production of n-type cells. Here, we report on the use of nontoxic and nonvolatile borosiloxane sols as the spin-on boron source. In comparison to the tribromide (BBr 3 ) boron diffusion that is applied in the production of most commercial n-type cells, borosiloxane boron diffusion may have potential advantages in terms of cost, safety, operability, etc. The borosiloxane sols studied here were formed from a cross-linking reaction between boron acid and a mixture of two types of silicon alkoxides, methyltriethoxysilane (MTEOS) and dimethyldiethoxysilane (DMDEOS). The MTEOS/DMDEOS ratio was found to be the key factor determining the synthetic period, net structure, thermal transformation property, and coating behavior of the borosiloxane sols. In combination with the spin-coating method, the performance of borosiloxane boron diffusion into phosphor-doped silicon wafers (1–3 Ω·cm) was systematically investigated by varying the borosiloxane composition (boron/silicon or MTEOS/DMDEOS ratio) and the diffusion process parameters (temperature, ambience, and period of individual sub-steps), and by relating them to the resulting sheet resistance and boron doping profile. The results show that under the diffusion conditions in conventional cell production lines, the formed p-emitters can have variable sheet resistance in the range of 35–582 Ω/□ and boron doping depth of 100–300 nm.
研究领域:
材料科学
·
半导体物理
·
光伏技术
·
表面工程
·
纳米材料
·
化学气相沉积
·
微电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Yan Sang,Xi Cao,Guangdong Dai,Lvxuan Wang,Yin Peng,Baoyou Geng
The construction of heterojunction system can promote the separation and transfer of photogenerated electron-hole pairs, which is conducive to the degradation of sewage. In this paper, heterostructured Bi 2 O 3 /Bi 2 S 3 nanoflowers are fabricated by a one-step hydrothermal method. The microstructure and optical absorption properties are studied through the detailed characterization of this heterojunction. The visible light photocatalytic ability of as-prepared Bi 2 O 3 /Bi 2 S 3 heterojunctions are investigated by photocatalytic removals of RhB and Cr(VI). The results of photocatalysis indicate that removal efficiencies of RhB and Cr(VI) over Bi 2 O 3 /Bi 2 S 3 heterojunction are higher than those of pure Bi 2 O 3 and Bi 2 S 3 . The improved photocatalytic performance of the Bi 2 O 3 /Bi 2 S 3 heterojunctions could be attributed to a combination of the p-n junction between the p-type Bi 2 S 3 and n-type Bi 2 O 3 , and large specific surface areas (46.31 m 2 g −1 ). Moreover, the probable photocatalytic mechanism of composite photocatalysts is explored in detail by active species trapping experiments, N 2 adsorption–desorption, the transient photovoltage electrochemical impedance spectroscopy and photoluminescence measurements. This work provides new insights into building of the efficient and novel heterogeneous photocatalysts and other energy-related devices.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 3
·834-840
·
IF 6.813
Chunwei Liu,Yancheng Hu,Guangyi Li,Aiqin Wang,Yu Cong,Xiaodong Wang,Tao Zhang,Ning Li
Decalins are the main component of JP-900, a coal-based thermal stable advanced aviation fuel. Meanwhile, these compounds are also widely used as additives to improve the volumetric heat value and thermal stability of aviation fuels. Herein, a brand new three-step route was developed for the synthesis of renewable alkylated decalins from 2-methyl-2,4-pentanediol (MPD) and p-quinone, two platform compounds that can be derived from lignocellulose. First, a mixture of C6 dienes was obtained from the dehydration of 2-methyl-2,4-pentanediol under the catalysis of choline chloride (ChCl) based acidic deep eutectic solvents (DES). Among the investigated reaction media, the ChCl/MSA DES prepared with ChCl and methanesulfonic acid (MSA) demonstrated the highest activity and selectivity for the dehydration of MPD. This can be rationalized by the relatively higher acid strength of the MSA. By the Diels–Alder reaction of C6 dienes and p-quinone, C12 cycloadducts with double six-membered ring carbon chain structures were formed in the absence of any catalyst. Finally, the C12 cycloadducts were further hydrodeoxygenated to alkylated decalins with high-density (0.91 g mL−1) and low freezing point (225–236 K) over a physical mixture of Pd/C and H-Y zeolite.
研究领域:
化学工程
·
可再生能源
·
催化科学
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DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Zheng Jiang,Jun Wang,Enyi Hu,Jingjing Liu,Lei Yu,Faze Wang
The p-i-n junction structure has garnered great interest from researchers due to its increased photoactive area and wider space charger region compared with that of the p-n junction. Herein the ultrawide bandgap (∼6.7 eV) semiconductor alumina (Al2O3) has been introduced to construct a p-i-n junction with ZnO and NiO. ZnO–Al2O3–NiO powders are suitable for electrolyte membrane material of low-temperature solid oxide fuel cells (LT-SOFCs). The insulating Al2O3 brings a doubled depletion region and more effective charge separation compared with the p-n junction consisting of ZnO and NiO. The fuel cell based on the p-i-n junction membrane material delivers an enhanced maximum power density (MPD) of 917 mW cm–2 along with a high open-circuit voltage (OCV) of 1.013 V at 550 °C. An analysis based on the space charge region and energy band alignment in the p-i-n junction is proposed to account for the appreciable cell performance and ionic conductivity, as well as the electron blocking and charge separation ability. This study presents a practical p-i-n junction design based on ZnO–Al2O3–NiO via a solution process for LT-SOFC electrolyte material and sheds light on the extensive exploration of p-i-n junctions applied in LT-SOFCs.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shumin Li,Jun Tan,Zhejun Jiang,Jin Wang,Zhengquan Li
Dye-sensitized systems show promising in photocatalysis because they can separate the tasks of light absorption, charge generation and surface catalysis to two coupled components. In this system, it is crucial to develop suitable catalysts capable of receiving dye-injected charges and having high activity to a given reaction. Aiming to photocatalytic H 2 and O 2 production, we present a metal-organic framework derived route to prepare bimetallic Fe-Ni-P nanotubes using Fe-Ni-MIL-88 nanorods as templates. When integrated with different dyes, these Fe-Ni-P nanotubes can serve as efficient catalysts for photocatalytic H 2 and O 2 production, respectively. Additionally, catalytic activities of such dye-sensitized systems can be conveniently regulated by tailoring the metal compositions in Fe-Ni-P nanotubes. The photocatalytic H 2 production of Fe 1 -Ni 2 -P can reach 5420 μmol g cat −1 h −1 under eosin-Y sensitization, which is 24 times and 6.7 times higher than Fe 2 P and Ni 2 P, respectively. The photocatalytic O 2 production of Fe 1 -Ni 2 -P can reach 900.3 μmol g cat −1 h −1 under [Ru(bpy) 3 ]Cl 2 sensitization, about 4.6 times and 2.9 times higher than Fe 2 P and Ni 2 P. The roles of different components in the system have been explored and corresponding working mechanism is proposed. This work demonstrates a new type of dye-sensitized systems consisting of bimetallic phosphides and provides a facile route to regulate their photocatalytic performance.
研究领域:
材料科学
·
光催化
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zhi Li,Qingxiang Zhou,Shuangying Li,Menghua Liu,Yanhui Li,Chunmao Chen
In this study, a label-free “turn off” fluorescent sensor has been resoundingly fabricated using carbon dots (CDs) for ultrasensitive detection of copper ions (Cu 2+ ). CDs are prepared by solid phase carbonization method using p-toluidine and l -cysteine as the precursors. The synthesized CDs exhibited the highest fluorescence intensity with excitation and emission wavelengths set at 300 nm and 400 nm, respectively. The CDs were selective and sensitive to Cu 2+ due to the static quenching mechanism. The concentration of CDs, and solution pH and incubation time were important parameters for the developed sensor. The experimental results showed that 20 mgL −1 was enough for the analysis. As the solution pH was concerned, it was apparent that the sensor was endowed with an excellent response signal to Cu 2+ and provided high sensitivity at pH 12. The interaction occurred very quickly, and the incubation time could be set at 1 min. The sensor provided a two-stage calibration curve to Cu 2+ in the range of 0.05–0.7 and 0.7–4 μM with a limit of detection of 47 nM. The obtained results clearly demonstrated that this facile method was fast, reliable and selective for detecting Cu 2+ , which would explore a prospective strategy for developing effective and low-cost sensors for monitoring metal ions in aqueous environments.
研究领域:
分析化学
·
环境科学
·
材料科学
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 41
·24533-24541
·
IF 3.119
Huiling Chen,Yuehua Wen,Yue Wang,Songtong Zhang,Pengcheng Zhao,Hai Ming,Gaoping Cao,Jingyi Qiu
For high-voltage cycling of lithium-ion batteries, a gel polymer Li-ion conductor layer, P(VDF-HFP)/LiTFSI (PHL) with high electrochemical stability has been coated on the surfaces of as-formed LiCoO2 (LCO) cathodes by a solution-casting technique at low temperature. An LCO cathode coated with around 3 μm thickness of the PHL ultrathin membrane, retains 88.4% of its original capacity (184.3 mA h g−1) after 200 cycles in the 3.0–4.6 V range with a standard carbonate electrolyte, while the non-coated one retains only 80.4% of its original capacity (171.5 mA h g−1). The reason for the better electrochemical behaviors and high-voltage cycling is related to the distinctive characteristics of the PHL coating layer that is compact, has highly-continuous surface coverage and penetrates the bulk of LCO, forming an integrated electrode. The PHL coating layer plays the role of an ion-conductive protection barrier to inhibit side reactions between the charged LCO surface and electrolyte, reduces the dissolution of cobalt ions and maintains the structural stability of LCO. Further, the PHL coated LCO cathode is well preserved, compared to the uncoated one which is severely cracked after 200 cycles at a charging cut-off voltage of 4.6 V.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 27
·13010-13020
·
IF 3.925
Jianke Tang,Yanfeng Xue,Chunlei Ma,Shengjian Zhang,Qiaoling Li
The construction of p–n heterojunctions instead of p-type or n-type semiconductors can improve the separation efficiency of photoinduced electrons and holes. In this work, BiOI/tetrapod-like ZnO whisker (T-ZnOw) p–n heterojunction photocatalysts with different Bi/Zn molar ratios were prepared by the in situ precipitation of BiOI on a T-ZnOw substrate. The BiOI/T-ZnOw photocatalysts efficiently degraded rhodamine B (RhB) and oxytetracycline (OTC) under visible light irradiation. The photocatalyst with a Bi/Zn molar ratio of 1 : 10 (BZ-10) exhibited the highest photocatalytic activity, with 97.1% and 88.0% removal of RhB and OTC, respectively. After degradation cycling experiments, the OTC removal efficiency was still 80.7%. The photocatalytic activity of the BZ-10 composite was improved compared to those of pure T-ZnOw and BiOI. This was attributed to the large specific surface area and the efficient separation of charge carriers caused by the formation of p–n heterojunctions between BiOI and T-ZnOw. The photodegradation mechanism was put forward based on radical trapping experiments and electron spin resonance (ESR) results. The synthesized BiOI/T-ZnOw heterojunction composite could be a promising photocatalyst in environmental photocatalysis.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 65
·52809-52816
·
IF 3.84
Hang Luo,Dou Zhang,Lu Wang,Chao Chen,Jing Zhou,Kechao Zhou
A sandwich-structured composite consisted of a pure poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) central layer and two BaTiO3–P(VDF-HFP) neighboring layers was developed for high energy storage density. The sandwiched structure effectively enhanced dielectric properties and energy storage capacity of the composites. Breakdown strength and energy storage density of the composite with 35 vol% P(VDF-HFP) central layer reached 315 kV mm−1 and 5.22 J cm−3, which were enhanced by 68% and 125% compared to 187 kV mm−1 and 2.32 J cm−3 of the single layer composite, respectively. The dielectric constant of the composites with sandwich-structure was approximately 3 times higher than the pure P(VDF-HFP) and the dielectric loss was as low as 0.026 at 1 kHz. These results demonstrated that the sandwich-structured ceramics/polymer composite was an effective way to produce high energy density composites.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
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