SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
·
IF 6.3
Wei Xie,Xiaoke Li,Jiaying Zhou,Fei Yin,Yaogang Jiang,Liu Yang
In this study, a novel approach for the synthesis of eco-friendly and cost-effective composite nanomaterials PPy@HNTs was introduced. The proposed synthesis method offers environmental friendliness, simplicity, and cost-effectiveness. The resulting PPy@HNTs nanofluids , obtained through dispersion in a specially formulated base solution, demonstrate excellent dispersion stability , desirable thermophysical properties , and remarkable photothermal conversion performance. At a concentration of 800 ppm, the PPy@HNTs nanofluids exhibited an impressive efficiency of 79.2 %, surpassing the performance of conventional heat transfer fluids (HTFs). This research presents a promising avenue for the utilization of low-cost nanofluids in the field of photothermal applications.
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高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Jialin Zhuang,Lingchao Wang,Yingmo Hu,Yechen Wang,Liping Lin,Jiaying Xiao,Yunfan Chen,Xiaowei Li,Huiqiang Liu,Qian Zhang,Qi An
Photopiezocatalysts can take advantage of both solar light and environmental mechanical energy, holding high significance in building a sustainable society. However, designing high potent photopiezocatalysts remains challenging. In this study, we propose the asymmetric ternary heterojunction as an efficient strategy for achieving effective photopiezocatalysts. The BTO/PPy/TiO2 catalyst composed of BaTiO3 (BTO) and TiO2 nanosheets and polypyrrole (PPy) nanoparticles present both enhanced asymmetric interfacial charge separation as well as deformability under mechanical stimuli, leading to appealing photopiezocatalytic capabilities. The d33 of the ternary BTO/PPy/TiO2 heterojunction is 3.1 times that of the binary BTO/TiO2 counterparts. In-situ synchrotron-radiation-IR measurements indicates that electric fields excite electrons to higher energy levels and lead to larger electron densities in the heterojunction. The piezoelectric fields also enhance charge separations. Using cycled assembly, the ternary BTO/PPy/TiO2 heterojunctions are facilely constructed on a copper mesh substrate, and its application in effective photopiezocatalytic degradation reactions are demonstrated. We expect the study elucidate the mechanism underlining efficient energy conversion and application in the photopiezocatalytically active asymmetric heterojunction and inspire the design of efficient catalysts.
研究领域:
材料科学
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催化
·
能量转换
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纳米技术
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环境科学
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高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 40
·e202402217
·
IF 1.9
Xiaowei Liu,Mengnan Ruan,Bo Li,Weixue Cao,Yuxin Sun,Ke Ruan,Zhifeng Liu
In order to obtain high dielectric properties nitrile rubber (NBR) dielectric elastomer composites, in this work, polypyrrole (PPy) was encapsulated on the surface of SrTiO 3 (STO) ceramic particles, and an insulating layer of poly (catechol/polyamine) (PCPA) was also covered on the outer surface of the STO-PPy core-shell particles (denoted as STO-PPy-PCPA particles), then the dielectric elastomer composites were prepared by adding STO and STO-PPy-PCPA to NBR, respectively. Due to the electrical conductivity of PPy, the dielectric constant of the STO-PPy-PCPA particles increases substantially. At the same time, the insulating layer of PCPA further prevents current leakage from the composite, which not only avoids premature electrical breakdown but also effectively reduces the dielectric loss. Compared with pure NBR, the dielectric constant of the prepared dielectric elastomer composites increased from 13 to 17.19 (20 phr STO-PPy-PCPA/NBR), and the actuated strain increased from 3.28 % to 13.86 % (5 phr STO-PPy-PCPA/NBR), which is 4.2 times that of pure NBR. This work successfully solves the current problems of requiring a large amount of ceramics to improve the dielectric constant and the tendency of conductive particles to agglomerate and premature breakdown. Graphical In this work, high performance NBR dielectric elastomer composites are obtained by synthesising the core-shell structure STO-PPy-PCPA and the actuated strain is enhanced from 3.28 % (pure NBR) to 13.86 (5 phr STO-PPy-PCPA/NBR).
研究领域:
材料科学
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聚合物复合材料
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介电与绝缘
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智能材料
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机电致动器
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2012
·Vol. 378
·期 1
·30-35
·
IF 3.07
Shangkun Li,Xiaofeng Lu,Xiang Li,Yanpeng Xue,Chengcheng Zhang,Junyu Lei,Ce Wang
A reactive-template vapor phase polymerization method for the preparation of bamboo-like polypyrrole (PPy) nanotubes has been successfully demonstrated in this paper. Herein, electrospun V 2 O 5 nanofibers were chosen as templates to deposit PPy, which served as the oxidants as well. This method can provide the fabrication of PPy nanostructures more easily than conventional routes due to its independence of removing template, which is usually a complex and tedious experimental process. The application of bamboo-like PPy nanotubes for Cr(VI) ions removal in aqueous solution has been explored. The resulting bamboo-like PPy nanotubes exhibited much higher adsorption performance than traditional PPy nanoparticles.
研究领域:
环境科学
·
纳米材料
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高分子化学
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环境污染治理
·
吸附技术
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高影响因子
NANOTECHNOLOGY
·
2017
·Vol. 28
·期 31
·315701
·
IF 3.44
Yingzhi Jiao,Fan Wu,Kun Zhang,Mengxiao Sun,Aming Xie,Wei Dong
Ribbon-like nano-structures possess high aspect ratios, and thus have great potential in the development of high-performance microwave absorption (MA) materials that can effectively eliminate adverse electromagnetic radiation. However, these nano-structures have been scarcely constructed in the field of MA, because of the lack of efficient synthetic routes. Herein, we developed an efficient method to successfully construct polypyrrole (PPy) nano-ribbons using the self-assembly aggregates of a racemic surfactant as the seeds. The frequency range with a reflection loss value of lower than −10 dB reached 7.68 GHz in the frequency range of 10.32–18.00 GHz, and surpassed all the currently reported PPy nano-structures, as well as most other MA nano-materials. Through changing the amount of surfactant, both the nano-structures and MA performance can be effectively regulated. Furthermore, the reason behind the high-performance MA of PPy nano-ribbons has been deeply explored. It opens up the opportunity for the application of conducting polymer nano-ribbons as a lightweight and tunable high-performance MA material, especially in applications of special aircraft and flexible electronics.
研究领域:
材料科学
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电磁学
·
高分子化学
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高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 16
·1015
·
IF 4.8
Xin Lin,Jiayi Tu,Jinyun Zhao,Fangfang Wu,Xingping Fu,Hao Lin,Jiapeng Hu
In this study, a hierarchical rod-assembled, polypyrrole-modified Ce–Al–La trimetallic metal–organic framework (Ce–Al–La–MOFs@PPy) composite was successfully synthesized through a solvothermal method combined with in situ polymerization for efficient fluoride removal from aqueous solutions. The incorporation of conductive polypyrrole (PPy) into the multimetallic MOFs effectively enhanced the structural stability, surface properties, and adsorption performance of the material. Adsorption experiments demonstrated that the optimal metal-to-ligand molar ratio was 3:1, and the prepared adsorbent exhibited excellent fluoride removal performance under weakly acidic conditions (pH = 5). The maximum adsorption capacity calculated from the Langmuir model reached 216.92 mg·g−1at 45 °C. Adsorption kinetics were well fitted by the pseudo-second-order model, indicating that the adsorption process was mainly governed by chemisorption. Mechanism investigations based on FTIR and XPS analyses demonstrated that fluoride removal mainly occurred through electrostatic attraction and coordination exchange between fluoride ions and the Ce/La active sites. In addition, the composite exhibited good selectivity, anti-interference ability toward coexisting ions, and satisfactory fluoride removal performance in practical industrial wastewater. These findings suggest that Ce–Al–La–MOFs@PPy is a promising adsorbent for efficient fluoride-contaminated wastewater treatment.
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Xiaoyan He,Yanling Liang,Xiaosu Cheng,Hui Fan,Zhentong Zhu,Yuxuan Zhang,Yihao Guo,Jing Li,Yuanyuan Lu,Zhiqiang Wang,Xiaoquan Lu
PPy/SrTiO 3 -Bi composites let biomass hydrogel evaporators combine photothermal conversion with photocatalytic degradation. • Adsorption interception coupled with photocatalytic degradation gives the evaporator excellent VOC removal efficiency. • The evaporator achieves a VOC removal efficiency of up to 99.3% under one-sun irradiation. • Under the same illumination condition, a high-water evaporation rate of 3.13 kg m −2 h −1 is also obtained. • This evaporator exhibits excellent salt resistance and water purification capabilities. Solar-driven interfacial evaporation technology has become an important approach to addressing the global water crisis due to its advantages such as being green and sustainable. However, due to the inherent volatility of volatile organic compounds (VOCs), the technology still faces severe challenges in removing VOCs from distilled water. In this paper, a biomass-based hydrogel evaporator (PSBH) integrating solar steam generation and photocatalytic degradation was constructed by immobilizing polypyrrole (PPy)-coated SrTiO 3 -Bi composites into an acrylamide (AM)/Kapok fibres composite hydrogel network via a one-pot method. This evaporator can effectively remove phenol (a typical VOC) that is volatilized along with water vapor, while achieving efficient solar-powered water evaporation. The introduction of kapok fibres endows AM hydrogels with superior structural stability and water transport efficiency, while reducing the energy required for the evaporation process, thereby enhancing the overall water transport and evaporation performance. PPy-coated SrTiO 3 -Bi composites achieve photothermal-photocatalytic synergy. The introduction of semimetal Bi nanoparticles enhances visible-light absorption and promotes spatial charge separation through its dual functional role as an electron trap and a plasmonic hot-electron donor, imparting excellent photocatalytic activity and photothermal conversion efficiency. Under 1 sun illumination, the interfacial evaporation rate can reach 3.13 kg m −2 h −1 . Meanwhile, the removal efficiency of a typical VOC (phenol) reaches 99.3%, enabling the simultaneous achievement of highly efficient seawater desalination and VOC removal. It is worth noting that the evaporation rate of this evaporator can still reach 2.22 kg m −2 h −1 in 20 wt% salt solution concentration, showing excellent environmental tolerance. This design offers a feasible strategy for multifunctional photothermal materials and a novel solution to VOCs pollution in solar interfacial evaporation. Download: Download high-res image (209KB) Download: Download full-size image
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高影响因子
CARBON
·
2026
·
IF 12.7
Tingwen Sun,Zijing Dong,Ziyue Yan,Hailin Wei,Yingnan Wu,Ye Hu,Jie Dong,Chao Zhi,Runjun Sun
Dual-shelled CoFe@C@PPy fibers are fabricated via microwave hydrothermal and in situ pyrrole polymerization. • PPy loading tunes magnetic-dielectric balance to optimize impedance matching. • Max RCS reduction hits 37.6 dB m² at 35°, RCS <−10 dB·m² for |θ|≥ 4°. • 134.2° contact angle brings excellent hydrophobicity and moisture resistance. The development of microwave absorbing materials (MAMs) with both wide-angle radar stealth capability and moisture resistance has become an urgent requirement for practical deployment. In this work, CoFe@C precursors are rapidly prepared via a microwave-assisted hydrothermal method, followed by in situ polymerization of pyrrole (Py) to construct dual-shelled CoFe@C@PPy hybrid fibers with different PPy loadings. The dual-shell architecture enables systematic regulation of the magnetic-dielectric balance and impedance matching. At an ultrathin thickness of 2.1 mm, the optimal sample achieves a minimum reflection loss (RL) of −52.06 dB at 13.14 GHz and a maximum effective absorption bandwidth (EAB) of 5.92 GHz. More importantly, wide-angle (0–90°) radar cross-section (RCS) simulations reveal outstanding suppression capability, with a maximum RCS reduction of 37.6 dB m 2 at an incident angle of 35°, demonstrating stable performance under oblique illumination in real radar detection scenarios. In addition, the optimal sample exhibits a water contact angle of 134.2°, showing good anti-humidity performance. This work provides a strategy for the design of dual-shelled microwave absorbers with excellent wide-angle radar cross-section reduction through interfacial polarization engineering. Download: Download high-res image (473KB) Download: Download full-size image
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 8
·337
·
IF 3.5
Wang Kai,Li Aiyuan,Zhou Xiaoyan,Yu Shibeike,Chen Bifen,Sun Xiangdong,Zhang Chenyang
Congo red (CR) is a representative benzidine-based anionic azo dye with high toxicity, carcinogenicity, and poor biodegradability, posing substantial threats to human health and aquatic ecosystems. Therefore, its effective removal from wastewater remains a major environmental challenge. To address this, magnetic Fe 3 O 4 @SiO 2 @PPy-CTAB composite microspheres (PPy: polypyrrole; CTAB: cetyltrimethylammonium bromide) were fabricated using a hydrothermal technique in combination with surface modification and in-situ polymerization. The composite was systematically examined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), and X-ray photoelectron spectroscopy (XPS), showing a well-defined core-shell framework, with a specific surface area (SSA) of 52.96 m 2 /g, a saturation magnetization of 42.8 emu·g − 1 , and a positively charged surface as a result of CTAB modification. Under optimal conditions (pH = 5, Fe 3 O 4 :CTAB mass ratio = 1:1.5), the CR adsorption capacity reached a maximum of 612.68 mg/g. Kinetic, isothermal, and thermodynamic analyses indicated that the adsorption process was best described by the pseudo-second-order kinetic model and the Langmuir isotherm model, suggesting a spontaneous, endothermic, and entropy-driven chemisorption process. The adsorption mechanism was primarily governed by electrostatic interactions, synergistic π-π stacking, and hydrogen bonding. After ten desorption-adsorption cycles, the adsorption capacity retained 87.1% of its initial adsorption capacity, demonstrating good reusability. The Fe 3 O 4 @SiO 2 @PPy-CTAB composite demonstrates high CR adsorption capacity (612.68 mg/g) and good reusability (87.1% retention after 10 cycles), making it a promising candidate for magnetic separation-based dye wastewater treatment. However, the use of CTAB and organic solvents limits the designation as “green”, and real-world validation is needed before practical application.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Taipeng Jiang,Jian Wu,Jingjing He,Sheng Chen,Jianyong Tang,Yingying Wang,Lingling Zeng,Ruiyi Han,Haiyang Huang,Jin Li,Zhuwei Gao
To address marine oil spills, developing highly efficient recovery technologies for high-viscosity crude oil has become a research priority. This study employs processed, delignified lightweight wood (WA) as a substrate. Through in-situ polymerization of polypyrrole (PPy) and coating modification with polydimethylsiloxane (PDMS), a composite aerogel (PDMS@PPy@WA) was successfully developed, exhibiting superhydrophobicity, rapid thermal responsiveness, and outstanding stability. This material fully preserves the three-dimensional porous framework of wood, exhibiting lightweight and highly permeable structural characteristics. It demonstrates a water contact angle as high as 159.30° and possesses rapid heating capabilities under both photothermal and electrothermal dual-drive conditions. Under 1-sun solar irradiance (1 kW/m 2 ), the material surface temperature can rise to 82.4 °C within 2 min. When driven by a 6 V voltage, it can similarly reach 82.6 °C within 2 min via the Joule heating effect. Additionally, this aerogel exhibits outstanding mechanical and chemical stability, withstanding pressures equivalent to 3,780 times its own weight. It maintains stable performance after 72 h of immersion in strong acid or strong alkali environments. Based on green, renewable biomass feedstocks and employing a streamlined functionalization strategy, this work provides a sustainable material solution with application potential for efficient, all-weather crude oil recovery.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Wei Zhang,Hengrui Wang,Siyi Ji,Yongqian Shi,Jiefeng Gao,Long-Cheng Tang,Pingan Song
In today's digital era, electromagnetic radiation pollution and fire hazard stand as a dual-edged sword, not only diminishing the efficacy of sophisticated electronic devices but also threatening human health. As a result, the pursuit of advanced electromagnetic shielding materials with high flame retardancy has ascended to the forefront of research priorities, underscoring their crucial role in mitigating these risks. In this study, pyrrole polymerization was employed to obtain a modified PPy-MXene, which was used to construct flame retardant modified MXene aerogel composites by the "Concreting" method. It was found that peak heat release rate, the total heat release, peak CO₂ production rate, peak smoke production rate and total smoke release of the C 1 M 2 MT FRs were reduced by 67.7 %, 46.7 %, 71.4 %, 71.7 % and 77.3 %, respectively. Furthermore, the average electromagnetic interference shielding effectiveness of C 1 M 2 MT FRs in the X-band and K-band reached 67.3 dB and 91.4 dB, respectively. It was noted that CMMT FRs had the ultra-low reflectivity (as low as 0.14). Additionally, the mechanical durability and strength of the aerogel composites were obviously enhanced, with compressive stress increased by a factor of 3.2, in comparison with that of the CNF aerogel.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Yinchun Fang,Xianglu Zhao,Xuchen Tao
High refractive index metal oxides can produce structural colors through Mie scattering, which have been studied for use in eco-friendly textiles coloring. However, the inherently low structural order of Mie scattering structural colors hinders the formation of brilliant color on white substrates, limiting the application fields. In this research, Cu 2 O@PPy core-shell microspheres with varying particle sizes (382, 414, 452, 500 and 563 nm) were synthesized, which were used to construct the structural color coatings with blue, green, yellowish green, yellow and bright yellow on poly(acrylate) (PA) adhesive-pretreated white polyester fabric via spray-coating. Cu 2 O@PPy microsphere structural color coating on the fabrics obtained superhydrophobicity with the water contact angles (WCA) greater than 150° by spraying polydimethylsiloxane (PDMS), thus endowing them with self-cleaning function. The PDMS treatment would not have a significant impact on the color of structural color coating on fabrics. The introduction of PA adhesive imparted excellent fastness to the structural color coating on fabrics with only minimal impact on physical properties. This research presents a novel method for fabricating functional structural color coatings on white fabrics using black polymer-coated core-shell microspheres.
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高影响因子
危险品化学品经营许可证（带存储）