RSC Advances
·
2021
·Vol. 11
·期 52
·32671-32679
·
IF 3.361
Hailian Bao,Xiaodi Chen,Rui Yuan,Chao Zhang,Shiai Xu
A surface heterojunction catalyst of g-C3N4–PEDOT/P3HT with P3HT and PEDOT as the polymer sensitizer and hole transport pathway is successfully prepared. The as constructed g-C3N4–PEDOT/P3HT composite exhibits a photocatalyst H2 evolution rate up to 427703.3 μmol h−1 g−1 which is 1059 times higher than that of g-C3N4, 118 times higher than that of g-C3N4–PEDOT with ascorbic acid as sacrificial reagents. What's more, the g-C3N4–PEDOT/P3HT can even show an obviously enhanced photocatalytic H2 evolution rate which is 6.1 times higher than that of pure g-C3N4 in pure water without any sacrificial reagent. Combining the experimental results and molecular dynamic (MD) simulation results, a possible mechanism can be drawn that the existed PEDOT possesses relatively higher hole mobility and can be used as a hole conductor between g-C3N4 and P3HT. Then, the photogenerated holes migration can be accelerated by PEDOT from the VB of g-C3N4 to the VB of P3HT. All those factors may benefit the synergy among g-C3N4, PEDOT and P3HT, which finally facilitates the rapid migration of photoinduced electron–hole pairs and eventually improves the photocatalytic H2 activity process of g-C3N4–PEDOT/P3HT with visible light. The present work may provide useful insights for designing a surface heterojunction composite photocatalyst with high photocatalytic activity for H2 production.
研究领域:
材料科学
·
化学
·
光催化
·
可再生能源
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2018
·Vol. 13
·期 21
·3246-3253
·
IF 3.692
Sanyin Qu,Qin Yao,Bingxue Yu,Kaiyang Zeng,Wei Shi,Yanling Chen,Lidong Chen
Graphical Weight problem : Poly(3-hexylthiophene) (P3HT) films with various molecular weights are successfully prepared, and both their molecular structures and thermoelectric (TE) properties are investigated. The molecular weight of P3HT is found to have an important effect on the carrier-transport properties by affecting the molecular structure and, as a result, also has an effect on the TE performance. Poly(3-hexylthiophene) (P3HT) films with various molecular weights (MWs) were successfully prepared, and both their molecular structures and thermoelectric (TE) properties were investigated. It was found that the molecular weight of P3HT had an important effect on the carrier-transport properties by affecting the molecular structure and, as a result, also had an effect on the TE performance. The electrical conductivity of the P3HT films first increased upon increasing the molecular weight and then decreased at high molecular weights, whereas the Seebeck coefficient remained at the same level. As a result, the P3HT-M 50k (MW≈50 000 g mol −1 ) film reached an electrical conductivity of (103.8±1.2) S cm, which is more than 20 times higher than the electrical conductivity of P3HT-M 10k (MW≈10 000 g mol −1 ) and almost 30 % higher than the electrical conductivity of P3HT-M 100k (MW≈100 000 g mol −1 ). Consequently, the maximum TE power factor of P3HT-M 50k at room temperature was as high as (22.6±0.6) μW mK −2 , which is much higher than that of either P3HT-M 10k or P3HT-M 100k . Microstructure analysis combined with C-AFM suggested that carrier transport between most of the ordered and amorphous regions was unconnected in films with low molecular weights, and this resulted in a high migration barrier and poor carrier mobility. Upon increasing the molecular weight, the long molecular chain provided enough connectivity for the charge to move through the ordered regions, which decreased the carrier barrier and increased carrier mobility. Therefore, both the conductivity and Seebeck coefficient were significantly improved. However, a too-high molecular weight could cause more folding of the polymer chain, which would deteriorate the electrical-transport properties. The experimental results not only reveal the intrinsic effect of molecular weight on the electric transporting properties of conducting polymers but also suggest that molecular-weight engineering is an effective way to design and screen high-performance polymer TE materials.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Na Yang,Jiarui Xue,Yuanxiao Ji,Jiyuan Zhang,Weiye Zhang,Xuexia He,Qi Li,zhibin lei,Zonghuai Liu,Jie Sun
Lithium Sulfur (Li-S) batteries have attracted great attention in recent years due to their high theoretical energy density (2600 Wh kg-1) and specific capacity (1675 mAh g-1), abundant reserves and environmental friendly. However, the well-known poor electrical conductivity of sulfur/Li2S, shuttle effect of Lithium Polysulfides (LiPSs) and the in-situ formation of lithium dendrites during cycling process extremely hinders the large fabrication of Li-S batteries. In this work, we have designed and prepared a Poly (3,4-ethylenedioxythiophene) (PEDOT) and Fe3C nanoparticles co-decorated Carbon Nanofibers (CNFs) membrane as a self-supporting Li2S host to enhance the electrochemical performance of Li-S batteries. The PEDOT coating layer can tightly connect Fe3C nanoparticles with the CNFs to form a conductive network, which significantly enhancing the conductivity of the cathode. At the same time, the strong chemical adsorption of PEDOT and the catalytic effect of Fe3C can effectively accelerate the conversion kinetics of LiPSs, thereby improving the battery performance. As a result, the optimized PEDOT@CNFs@Fe3C-16wt%/Li2S composite cathode can achieve a high initial specific capacity of 816 mAh g-1 at the current density of 0.1 C. While such cathode also exhibits only 0.033% capacity decay per cycle at 0.5 C after 1000 cycles, showing its advantages as a high-performance self-supporting flexible Li-S composite cathode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2018
·Vol. 10
·期 8
·815
·
IF 2.935
Sanyin Qu,Chen Ming,Qin Yao,Wanheng Lu,Kaiyang Zeng,Wei Shi,Xun Shi,Ctirad Uher,Lidong Chen
The fundamental understanding of the influence of molecular structure on the carrier transport properties in the field of organic thermoelectrics (OTEs) is a big challenge since the carrier transport behavior in conducting polymers reveals average properties contributed from all carrier transport channels, including those through intra-chain, inter-chain, inter-grain, and hopping between disordered localized sites. Here, combining molecular dynamics simulations and experiments, we investigated the carrier transport properties of doped highly oriented poly(3-hexylthiophene) (P3HT) films with different side-chain regioregularity. It is demonstrated that the substitution of side chains can not only take effect on the carrier transport edge, but also on the dimensionality of the transport paths and as a result, on the carrier mobility. Conductive atomic force microscopy (C-AFM) study as well as temperature-dependent measurements of the electrical conductivity clearly showed ordered local current paths in the regular side chain P3HT films, while random paths prevailed in the irregular sample. Regular side chain substitution can be activated more easily and favors one-dimensional transport along the backbone chain direction, while the irregular sample presents the three-dimensional electron hopping behavior. As a consequence, the regular side chain P3HT samples demonstrated high carrier mobility of 2.9 ± 0.3 cm2/V·s, which is more than one order of magnitude higher than that in irregular side chain P3HT films, resulting in a maximum thermoelectric (TE) power factor of 39.1 ± 2.5 μW/mK2at room temperature. These findings would formulate design rules for organic semiconductors based on these complex systems, and especially assist in the design of high performance OTE polymers.Keywords:organic thermoelectric;poly(3-hexylthiophene);regioregularity;carrier transport
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 19
·15577-15584
·
IF 3.289
Haixia Xuan,Xi Chen,Yinghui Wu,Kena Song,Yuenan Li,Ruchuan Liu
The impact of the nanostructures of conjugated polymers on their electronic properties is significant. We notice that poly(3-hexylthiophene-2,5-diyl) (P3HT) can form nano-islands and nano-fibrils, and both of them show an similar single-layer thickness (∼1.5–1.6 nm) as evaluated by atomic force microscopy (AFM). The Raman spectra indicate the highest degree of chain planarity and crystallinity in the nano-islands. By using scanning Kelvin probe microscopy (SKPM) and electrostatic force microscopy (EFM), we image the surface potential at the nanometer scale and quantitatively estimate the charges on these nanostructures as modulated by light. Both results are consistent with each other: the surface potential increases on switching on the light, and the photo-induced charges are around 15–25% and positive. A similar amount of the photo-induced charges in both P3HT islands and fibril is consistent with the π–π stacking nature of these nanostructures. As P3HT is a hole-conducting molecule, positive charges are found easily injected into a single island by a positively biased EFM tip, and then the injected charges are able to propagate all over the island.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Sihang Li,Juan Wang,Yujie Zhang,Anran Cheng,Peng Cai,Jinzhao Su,Yi Shen,Min Zhou,Kai Jiang,Kangli Wang
To reduce the dependence on traditional fossil energy, developing efficient energy storage systems is urgent. The reserves of aluminum resources in the earth’s crust are extremely rich, which makes aluminum-ion batteries a promising competitor of new energy storage devices. Here, we report a poly(3-methylthiophene)/graphene (P3TH/Graphene) composite as the cathode of an aluminum-ion battery. The adjustment of polymer chain spacing by the methyl side chain provides a channel conducive to the transport of large-size AlCl4– complexes. The addition of electron donor groups also changes the electron delocalization characteristics of polymers and improves the specific capacity of the material. At the same time, the in situ composite of graphene can enhance the Π–Π interaction to form a favorable electronic transmission channel. At a current density of 200 mA g–1, the P3TH/Graphene composite showed a specific capacity of ∼150 mA g–1. The flexible structure of the polymer also guarantees the excellent rate capability of the composite.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2018
·
IF 3.716
Jianlin Peng,Meiling Qi
This work describes the investigation of utilizing a chain-typed thiophene-based π-conjugated polymer, i . e ., poly(3-hexylthiophene) (P3HT), as the stationary phase for gas chromatography (GC). The P3HT column was statically prepared and investigated for its column efficiency, polarity, separation performance, repeatability and thermal stability. As a result, it showed moderate polarity and column efficiencies of 3260, 3310 and 3790 plates/m for 1-octanol, naphthalene and n -dodecane, respectively. As evidenced, it exhibited high-resolution performance for aliphatic and aromatic isomers, including those critical pairs such as phenanthrene/anthracene and p -/ m -benzenediol isomers. Moreover, it displayed stronger retention for alkanes, alcohols and phenols in comparison to the polysiloxane stationary phase with close polarity. Also, the P3HT column had good repeatability and reproducibility with the RSD values less than 0.05% for run-to-run, 0.17–0.54% for day-to-day and 2.7–5.2% for column-to-column, and good thermal stability up to 260 °C. This work demonstrates the promising future of the thiophene-based polymer and its derivatives in separation science.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2013
·Vol. 10
·期 5
·659-668
·
IF 1.094
Zhu Guang,Hou Jian,Zhu Hongfei,Qiu Ri,Xu Jingkun
Poly(3,4-ethylenedioxythiophene) (PEDOT) coatings have been electrochemically prepared on stainless steel (SS) in acetonitrile and aqueous media, respectively, by the cyclic voltammetry technique. The corrosion behavior of the coated SS was evaluated in 3.5 wt% NaCl solution using anodic polarization and electrochemical impedance spectroscopy, which demonstrate that the polymer coatings are able to mitigate the corrosion of the SS substrate in chloride solution. PEDOT works as the electron exchange medium to passivate the SS underneath and reduce the oxygen on the surface. By comparing the performances, it was clear that PEDOT electrodeposited from an aqueous solution can afford better corrosion inhibition capability.
研究领域:
材料科学
·
电化学
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Zhenglong Yang,Jing Yu,Kangyu Fu,Fengfeng Tang
The poly(3-hexylthiophene) - multiwalled carbon nanotube hybrid material (P3HT-MWCNT) was successfully prepared in the Cu(I)/DBU catalyst system via in-situ click reaction. The properties of P3HT-MWCNT were measured by FTIR, 1 H NMR, UV-vis, XRD , TEM , SEM . The fluorescence spectrum of P3HT-MWCNT proved the covalent bond between P3HT and MWCNT, and P3HT could be coated on the surface of MWCNT. Compared with the physical blends of P3HT and MWCNT, P3HT-MWCNT prepared by click chemistry exhibited better thermal stability and a higher melting point of 243.2 °C. TG results also indicated that P3HT content of P3HT-MWCNT was 21.4%. It was expected to prepare novel organic-inorganic donor-acceptor hybrid material with good solubility, optical and thermal stability, which may be a promising material applied in preparation of organic photoelectron in the future.
研究领域:
材料科学
·
有机化学
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 23
·期 4
·997-1003
·
IF 2.119
Fan Xiaojian,Lin Peipei,Liang Shaoping,Hui Ni,Zhang Ruiqiao,Feng Jiuju,Xu Guiyun
Poly(3,4-ethylenedioxythiophene) (PEDOT) doped with bovine serum albumin-stabilized Au nanoclusters (AuNCs) was successfully synthesized through electrochemical polymerization in a solution containing EDOT monomer and AuNCs. The obtained PEDOT/AuNCs composite possessed a microstructure with AuNCs evenly distributed within the PEDOT film as dopants. The PEDOT/AuNCs modified electrode exhibited high electrocatalytic activity toward nitrite oxidation, and it was further developed into an amperometric sensor for nitrite. If operated at 0.80 V (vs. SCE), the linear range of the sensor was from 0.05 to 2600 μM, with a very low limit of detection of 17 nM (S/ N = 3).
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-8
·
IF 5.228
Li Yu-Tao,Tang Li-Na,Ning Yong,Shu Qing,Liang Feng-Xia,Wang Hua,Zhang Guo-Jun
Acupuncture treatment is amazing but controversial. Up to now, the mechanism of treating diseases by acupuncture and moxibustion is still unclear, especially the occurrence of the molecular events in local acupoints. Herein, we report an extremely stable microsensor by modifying carbon nanotube (CNT) to the tip surface of acupuncture needle and applying this CNT-modified acupuncture needle for real time monitoring of serotonin (5-HT) in vivo . To stabilize CNT modification on the needle tip surface, poly(3,4-ethylenedioxythiophene)(PEDOT) was employed as glue water to stick CNT on the needle. The detection limit of the CNT-modified needle was found to be approximately 50 nM and 78 nM in the PBS and the cell medium, respectively. In addition, the needle showed good selectivity to some inflammatory mediators and some electroactive molecules. For the first time, the CNT-modified needle could be directly probed into rat body for real time monitoring of 5-HT in vivo , showing a great potential for better understanding the mechanism of acupuncture treatment.
研究领域:
生物医学工程
·
神经科学
✓ 已验证
DOI
PubMed
高影响因子
CELLULOSE
·
2016
·Vol. 24
·期 2
·591-607
·
IF 3.195
Xiao Guifa,Ding Chunyue,Song Feiyu,Qian Xueren,An Xianhui
A facile strategy for preparation of alkyne-functionalized cellulose fibers with click reactivity is reported herein. Poly(3-ethynylaniline) [poly(3-EA)] with pendant alkynyl groups was obtained by chemical oxidation polymerization of 3-ethynylaniline with ammonium persulfate in low-concentration hydrochloric acid solution at ice-bath temperature and used to generate alkyne-functionalized cellulose fibers in situ from pulp fibres. Successful preparation of alkyne-functionalized cellulose fibers was confirmed by attenuated total reflectance Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. The effects of process variables on poly(3-EA) deposition and fiber loss were investigated, and suitable preparation conditions identified. Deposition of poly(3-EA) did not change the crystallinity or hydrophilicity of the cellulose fibers. Poly(3-EA) and alkyne-functionalized cellulose fibers reacted with azides by Cu(I)-catalyzed alkyne–azide 1,3-dipolar cycloaddition. Thus, this in situ chemical polymerization technology provides a new platform for click functionalization of cellulose fibers. Applications of cellulose fibers produced in this way are limited to those without demanding requirements in terms of product strength or color.
研究领域:
材料科学
·
化学工程
✓ 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）