MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 222
·期 10
·2000418
·
IF 2.527
Haoting Zheng,Kun Wu,Weilong Chen,Bingfei Nan,Zhencai Qu,Mangeng Lu
A series of copolymers of poly3-alkylthiophene (PTm) with different side chain lengths and copolymers of 3-butylthiophene and 3-butoxythiophene (PTDx) with different ratios are synthesized by oxidative polymerization. As the length of the side chain decreases, WAXD patterns of PTm show an increase in crystallinity. An increment of 50% in thermal conductivity is observed and the maximum thermal conductivity reaches to 0.320 Wm –1 K –1 . For PTDx, as the proportion of 3-butoxythiophene increases, the UV spectrum appears red-shifted, indicating an enhanced degree of p-π conjugation. The thermal conductivity of PTDx is increased from 0.340 to 0.374 Wm –1 K –1 , which is around twice that of traditional thermoplastics. Molecular dynamics (MD) is used to simulate the changes in the volume and dihedral angle overlap of the polymer at different temperatures, and achieves the same result as the experiment. MD simulations and experimental measurements have shown that reducing steric hindrance and enhancing p-π conjugation can increase the thermal conductivity of the polymer. Young's modulus of PTDx (around 1.86 GPa) is lower than that of conventional plastics, and its flexibility makes it more versatile.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Jiajia Wang,Xin Hua,Baokang Jin
A facile method for the in situ fabrication of chitosan/polythiophene/CdTe (CS/PTh/CdTe) nanocomposite has been developed. It was then connected with anti-CEA (Ab), which was evoked for the electrochemical detection of carcinoembryonic antigen (CEA, Ag) within K4Fe(CN)6. The results indicate that CS/PTh/CdTe/GCE has a high selectivity for the detection of CEA with a wide linear range of 0.0001–10000 ng/mL and excellent sensitivity with a low detection limit of 40 fg/mL. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and in situ FT-IR spectra are evoked to study the mechanism of detection of CEA via CS/PTh/CdTe/GCE. The high sensitivity of the electrochemical sensor is due to the fact that the electrochemical oxidation products of K4Fe(CN)6 can directly oxidize CdTe from a low energy state to a high energy state (CdTe)*, making CdTe more prone to be oxidized and facilitate electron transfer. The developed electrochemical biosensor can be used for the detection of real samples, providing a precise method for the detection of CEA with potential application in the clinical detection of tumors.
研究领域:
生物医学工程
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分析化学
·
肿瘤学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2014
·Vol. 7
·期 5
·3786-3801
·
IF 1.879
Ruxangul Jamal,Yakupjan Osman,Adalet Rahman,Ahmat Ali,Yu Zhang,Tursun Abdiryim
Poly(3,4-propylenedioxy-2,2′:5′,2″-terthiophene)/TiO2and poly(3,4-(2,2-dimethylenepropylenedioxy)-2,2′:5′,2″-terthiophene)/TiO2nanocomposites were synthesized by a simple solid-state method. Additionally, the poly(3,4-propylenedioxy thiophene)/TiO2and poly(3,4-2,2-dimethylenepropylenedioxythiophene)/TiO2nanocomposites were synthesized in a similar manner for comparison. The structure and morphology were characterized by Fourier transform infrared (FTIR), ultraviolet-visible (UV-Vis) absorption spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). The photocatalytic activities of the nanocomposites were examined through the degradation processes of a methylene blue (MB) solution under UV light and sunlight irradiation. The results of FTIR and UV-Vis spectra showed that the composites were successfully synthesized by solid-state method and the poly(3,4-propylenedioxy-2,2′:5′,2″-terthiophene)/TiO2and poly(3,4-(2,2-dimethylenepropylenedioxy)-2,2′:5′,2″-terthiophene)/TiO2nanocomposite had a higher oxidation degree and conjugation length than others. The results also indicated that the TiO2had no effect on the crystallinity of composites, but was well embedded in the polymer matrix. Additionally, the highest degradation efficiency of 90.5% occurred in the case of the poly(3,4-propylenedioxy-2,2′:5′,2″-terthiophene)/TiO2nanocomposite.Keywords:polyterthiophene derivative;nano-TiO2;solid-state method;photocatalyst
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Jianing Li,Dongkui Zhang,Jiangbin Xia
Herein, hydrothermal method was used to prepare a series of multi-color polythiophene modified carbon quantum dots. Under UV excitation, fluorescence their maximum emission wavelengths appear at 612 nm, 570 nm, and 540 nm respectively. The prepared CD-BTH and CD-BN can have specific detection of Au 3+ and Hg 2+ through fluorescence quenching effect. The detection limits for Au 3+ are 3 nM and 5.4 nM respectively, and for Hg 2+ are 23 nM and 90 nM respectively. CD-KN detects Au 3+ specifically through fluorescence resonance, with a detection limit of 33 nM. Under the interference of other metal ions, three types of polythiophene modified quantum carbon dots exhibit excellent selectivity for the responsive ions. Meanwhile, this article also elucidates the law that as the electron withdrawing ability of the side chains of polythiophene derivatives increasing, the fluorescence emission peaks of the prepared polythiophene modified carbon dots shifts red and the fluorescence quantum yield is higher.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2024
·
IF 9.8
Wei Shen,Yanxing He,Yanfeng Chen,Shuo Chen,Zhihua Chen,Chenxi Liu,Hao Cui,Suyun Liu,Lihui Liu,Gang Cheng,Shufen Chen
Poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is one of the most widely used functional materials for hole transport layer in perovskite light-emitting diode (LED). Tuning its work function (WF) and conductivity (κ) is a key issue for promoting perovskite LED performance. While decreasing its WF always reduces its κ and vice versa. Solving such contradiction is quite significant for promoting the development and commercialization of perovskite LED. Herein, the aniline (Ani) is employed for PEDOT:PSS interface modification. Ani inserted between PEDOT and PSS to weaken electrostatic interaction between sulfonic acid group in PSS chain and thiophene group in PEDOT chain, which results in increased delocalized electrons to enhance its κ. More importantly, the acid–base reaction decreases high acidity of PEDOT:PSS, which is an effective way to increase its WF and decrease its interface defects density. Meanwhile, such interface modification avoids PEDOT:PSS phase separation and ensures the uniformity of film. After Ani modification, the WF of PEDOT:PSS increase from 5.16 to 5.31 eV, the κ increases from 0.30 to 8.62 S cm −1 , and the hole mobility enhances from 0.716 × 10 −6 to 1.306 × 10 −6 cm 2 V −1 s −1 . Modified PEDOT:PSS boost CsPbI 3 LED achieving a maximum external quantum efficiency of 17.70%.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2011
·
IF 1.871
Cunyuan Lai,Wenjuan Guo,Xinde Tang,Guangyou Zhang,Qiwei Pan,Meishan Pei
The electropolymerization and deposition of conjugated polythiophene network films on planar indium tin oxide electrode surfaces were described. The precursor polymer, a polymethacrylate functionalized with thiophene, poly[3-(hexyl methacrylate)]thiophene (P3HMAT), was synthesized and then electropolymerized on ITO substrates in boron trifluoride diethyl etherate (BFEE)/CH 2 Cl 2 (v/v = 6:4) binary solution system, resulting in poly{poly[3-(hexyl methacrylate)]thiophene} (PP3HMAT). The possibility of inter- and intramolecular polymerization resulted in a cross-linking conjugated network microstructure. The fluorescence spectra indicated that PP3HMAT films can be used as yellow-green-light emitters even they could not be dissolved in common solvents. The thermal analyses demonstrated that PP3HMAT has good thermal stability. In addition, the molecular weight and distribution of P3HMAT were characterized by GPC, and the molecular structures of the monomer and the polymers were characterized by 1 H NMR and FTIR, and optical properties of the monomer and polymers were characterized by UV–vis spectroscopy.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2020
·
IF 6.444
Yan-Jun Wan,Xing-Miao Li,Peng-Li Zhu,Rong Sun,Ching-Ping Wong,Wei-Hsin Liao
How to obtain high strength while remain the good shielding performance of MXene film is a big challenge, which limits its further application. Herein, we report on fabrication of mechanically strong and high-performance EMI shielding Ti 3 C 2 T x composite film by incorporating of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) and then treatment with concentrated sulfuric acid to remove the insulating PSS. By introducing of 30 wt% PEDOT:PSS into Ti 3 C 2 T x film and with acid post-treatment, the EMI SE of composite film with thickness of ~6.6 μm is up to 40.5 dB while the tensile strength is 38.5 ± 2.9 MPa and the increment in tensile strength is as high as 155% when compared to that of Ti 3 C 2 T x film. It achieves a good balance between shielding performance and mechanical property, which has not been achieved in reported literatures. The combination of mechanical and shielding performances portfolio outperforms the counterpart of other polymer composites filled with MXene.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Changzhou Chen,Wenyao Feng,Weixin Wu,Yuanyuan Yu,Guangfu Qian,Lianhua Fu,Douyong Min
In the development of the modern electronics industry, the high mechanical performance, the green, and high-performance electromagnetic interference (EMI) shielding materials need to urgently be developed. Herein, polythiophene/Wood (PEDOT/wood) was fabricated through in situ polymerizing thiophene in the delignified paulownia wood. The results indicated that PEDOT were evenly distributed on the carbohydrates framework of the wood, endowing the composite with a highly electrical conductivity of 112.8 S m −1 and a superior electromagnetic shielding effectiveness of 46.2 dB at 2 mm thickness. The normalized SE (EMI SE/thickness) of the composite calculated as 213 dB/cm. Meanwhile, a high compressive strength and tensile strength of the prepared PEDOT/wood composite were tested as 50.9 MPa and 67.8 MPa, respectively. Such a high conductivity, strong mechanical properties and renewable PEDOT/wood suggests it as a potential candidate for the application in electromagnetic interference shielding and paves a new way for the biomass-based electromagnetic shielding materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yu Zhang,Yaolong Zhang,Ruxangul Jamal,Shuyue Xie,Abdukeyum Abdurexit,Tursun Abdiryim,Hongtao Yang,Kai Song
To improve the efficiency of the methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs), it is essential to develop catalysts with high catalytic activity. However, constructing polyatomic doped carbon nanomaterials and understanding the interaction mechanisms between dopant elements remain significant challenges. In this study, we propose nitrogen-doped carbon nanobox (CNB) derived from Zeolitic Imidazolate Framework-67 (ZIF-67) crystals as precursors to serve as carriers for highly efficient platinum nanoparticles (Pt NPs). We synthesized platinum/poly(3,4-propylenedioxythiophene)/carbon nanobox (Pt/PProDOT/CNB) composites by wrapping CNB around PProDOT films via in situ oxidative polymerization. This unique structural design provides several advantages to the catalyst, including a large active surface area, numerous accessible electrocatalytic active centers, an optimized electronic structure, and good electronic conductivity. The Pt/PProDOT/CNB composites demonstrated excellent methanol oxidation performance, with a remarkable mass activity (MA) of 1639.9 mA mg -1 Pt and a high electrochemical active surface area (ECSA) of 160.8 m 2 /g. Furthermore, the catalyst exhibited good CO resistance and outstanding durability.
研究领域:
材料科学
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催化化学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mingyu Wang,Honglin Kuang,Lu Zhou,Mengru Shan,Sihao Jiang,Danying Ma,Shiwen Lv,Yanqing Cong,Yingqi Song,Yi Zhang
Sea urchin-like Cu x S nanoflowers were prepared on copper foam substrate by in situ thermal oxidation and hydrothermal vulcanization. Then, thiophene (Th) was copolymerized with MgAl layered double hydroxide (MgAl-LDH) on Cu x S to obtain a polythiophene (PTh)/MgAl-LDH@Cu x S composite photocathode. Under visible-light irradiation, the electrode exhibits high photocurrent response and excellent stability for 72 h. Under an applied voltage of 3 V, the photogenic carrier was effectively separated, and combined with the graphite anode to generate highly oxidizing reactive oxygen species (ROS) and active chlorine directly and indirectly, which can achieve logarithmic inactivation of 7.57 and 7.07 log 10 CFU/mL against Escherichia coli and Bacillus subtilis within 15 and 25 min, respectively. The mechanism of photoelectrocatalytic reaction for disinfection was explored through cell membrane integrity, DNA/protein leakage and active substances analysis, and a free radical capture experiment proved that O 2 ∙– and h + played key roles in the disinfection process. The purification and degradation of different actual wastewaters show that the photoelectrocatalytic system has great practical application potential in water disinfection.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Qiang Zhang,Zengsheng Weng,Kun Wu,Weilong Chen,Mangeng Lu
Two kinds of thiophene monomers (thiophene and thiophene carboxylic acid) are used to synthesize a series of polythiophene matrix materials with different ratios. Polythiophene carboxylic acid can form strong hydrogen bonds between molecules, and the conjugated thiophene ring can be used to obtain higher thermal conductivity. The core–shell structure of polythiophene-coated polyethylene glycol and nano zinc oxide was synthesized by in situ polymerization to form a shaped phase change composite. The electron micrograph shows this phenomenon very well. Comparing the thermal conductivity and heat storage performance of two different polythiophene matrix composites, it can be explained that the chemical interaction between molecules is conducive to the formation of heat conduction pathways. Thermal decomposition temperature of polythiophene carboxylic acid and its polyethylene glycol composite structure is about 10 °C higher than that of polythiophene, which, on the other hand, also indicates the tight molecular arrangement. It is derived from the differentiation of its molecular structure, and this compact structure plays a positive role in the improvement of its thermal conductivity. However, excessive intermolecular force hinders the regular arrangement of polyethylene glycol. Under the condition that the amount of thermal conductive filler is 25%, the thermal conductivity is increased from 0.895 to 1.05 W · m–1k–1 and the phase transition is decreased from 149 J/g to less than 135 J/g. Finally, the stability of the shaped phase change composite was good, the solid form was maintained near the phase transition temperature, and no leakage was observed.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 107
·62096-62104
·
IF 3.708
Junjie Li,Lei Wang,Xiaole Jia,Xiongzhi Xiang,Cheuk-Lam Ho,Wai-Yeung Wong,Hua Li
Polymer–inorganic composites show great potential for use as thermoelectric (TE) materials. However, the TE performance of these materials needs to be improved. One way to improve the TE performance would be to synthesize novel conductive polymers with high Seebeck coefficients to prepare polymer–inorganic TE composites. In this study, acidized and ammoniated forms of poly[(3-methylthiophene-2,5-diyl)(diphenylaminobenzylidene)(3-methylthiophene quinodimethane-2,5-diyl)] (PMTDPABQ) were successfully synthesized with high Seebeck coefficients. These polymers were used to prepare a series of PMTDPABQ/graphite (G) bulk composites by mechanical ball milling and cold pressing. The morphology, thermal stability, and TE performance of these composites were evaluated. The G was uniformly dispersed in the polymer matrix, and the composite materials exhibited good thermal stability at temperatures up to 200 °C. The acidized PMTDPABQ/G composites exhibited better TE performance than the ammoniated PMTDPABQ/G composites. The highest TE figure of merit, ZT = 5.32 × 10−3, was obtained using acidized PMTDPABQ/G and was approximately 3 times greater than that of polythiophene (PTh)/G (1.37 × 10−3).
研究领域:
材料科学
·
聚合物化学
✓ 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）