DESALINATION
·
2014
·
IF 3.96
Yaojie Li,Lifen Liu,Jiadong Liu,Fenglin Yang,Nanqi Ren
To increase effluent quality and membrane flux , membrane bioreactor was integrated with microbial fuel cell (MBR/MFC), in which functional cathode membranes could enable fouling reduction and even electro-catalytic pollutant degradation using the bio-generated electricity. Modifying stainless steel mesh (SSM) with only polypyrrole (PPy) or cheap ARS (Alizarin Red's) or expensive AQS (9,10-anthraquinone-2-sulfonic acid) doped PPy film, helped obtain high ORR (oxygen reduction reaction) activity and higher power output in the integrated MBR/MFC system. The ARS and PPy modified cathode membranes, could not only increase the degradation of (MB) methylene blue (> 90%, 1 h), but also enable higher antifouling property in filtrations. Most importantly, replacing the blank SSM, the use of PPy/AQS, PPy/ARS and PPy modified SSM, increased power density 31.37, 27.06 and 23.7 times respectively in the integrated MBR/MFC system. The new system has great application potential and economic feasibility in effective removal of COD and NH 4 + -N nutrients, has better effluent qualities and has higher energy recovery.
研究领域:
环境科学
·
生物技术
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Li Gang,Ren Haifang,Geng Chunping,Wu Xiang
Electrical energy storage devices (EES) play an important role in the development of portable electronic devices, power grids, and electric vehicles. Supercapacitors (SCs) become the focus of the EES field due to their high power density and high energy density. ZnCo 2 O 4 ternary metal oxides show considerable potential as electrodes for SCs. In this work, Ni(OH) 2 and PPy materials are combined on the surface of ZnCo 2 O 4 samples. The synthesized products possess a specific capacitance of 1256 C/g at 1 A/g and an energy density of 69 Wh/kg at 1350 W/kg. Moreover, the assembled device retains 81% of its capacity after being fully charged and discharged 10,000 times.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 12
·2449
·
IF 4.324
Shiliang Heng,Lei Li,Weiwei Li,Haiyan Li,Jingyu Pang,Mengzhen Zhang,Yan Bai,Dongbin Dang
The development of high-efficiency, recyclable, and inexpensive photocatalysts for water splitting for hydrogen production is of great significance to the application of solar energy. Herein, a series of graphene-decorated polyoxoniobate photocatalysts Nb6/PPy-RGO (Nb6= K7HNb6O19, RGO = reduced graphene oxide, PPy = polypyrrole), with the bridging effect of polypyrrole were prepared through a simple one-step solvothermal method, which is the first example of polyoxoniobate-graphene-based nanocomposites. The as-fabricated photocatalyst showed a photocatalytic H2evolution activity without any co-catalyst. The rate of 1038 µmol g−1in 5 h under optimal condition is almost 43 times higher than that of pure K7HNb6O19·13H2O. The influencing factors for photocatalysts in photocatalytic hydrogen production under simulated sunlight were studied in detail and the feasible mechanism is presented in this paper. These results demonstrate that Nb6O19acts as the main catalyst and electron donor, RGO provides active sites, and PPy acted as an electronic bridge to extend the lifetime of photo-generated carriers, which are crucial factors for photocatalytic H2production.Keywords:polyoxoniobate;Nb6/PPy-RGO composites;electronic bridge;H2production
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Fengsen Xie,Yajie Wang,Shixun Zhang,Yamin Pan,Chuntai Liu,Changyu Shen,Xianhu Liu
Composite films composed of biodegradable materials possessing flexibility, thermal regulation capabilities, and electromagnetic interference shielding attributes represent optimal selections for wearable items and the packaging of devices. Here, we employ a simple alternating immersion and spray-coating process to fabricate flexible multifunctional films by combining hydrophobic PLA electrospun film with PPy and MXene , and investigate the thermal management and electromagnetic interference shielding properties of the films. Through alternating immersion, PPy can be rapidly in-situ polymerized on the PLA film, enhancing the surface roughness of the fibers, enabling firm integration of MXene with the film. Benefiting from the broad wavelength absorption characteristics of PPy, the solar absorption capacity of the film is significantly enhanced (97.16 %), endowing it with excellent photothermal conversion capability. Meanwhile, the high conductivity of MXene imparts the composite film with controllable and stable active heating ability, meeting heating demands under complex weather conditions. Finally, inspired by origami techniques the electromagnetic interference shielding performance of films with different folding frequencies was compared. It was found that attributed to the increased reflection paths, the film exhibited a significant improvement in electromagnetic interference shielding performance (32.58 dB to 51.96 dB) after folding. In brief, this biodegradable multifunctional composite film is an attractive candidate for future wearable products or devices packaging.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Qiyang Guo,Ruixiang Yao,Huili Cheng,Kai Yin,Xiangrong Chen,Yaqing Lu,Ashish Paramane
The strategy of functionalized PS-NPs via PPy (PPy@PS-NPs) forming heterogeneous interface composition is highly efficient in increasing the insulation properties of linear low-density polyethylene (LLDPE). The morphology results show that PPy@PS-NPs are monodispersed in the LLDPE matrix after melting blend, which exhibits unparalleled engineering application value. The electrical insulation results show that PPy@PS-NPs introduced into the LLDPE matrix can reduce its DC electrical conductivity, enhance DC breakdown strength, and inhibit space charge accumulation. When the PPy@PS-NPs concentration is 0.5 wt%, the DC breakdown strength is 35.3 % higher than that of LLDPE. Mechanism research indicates that the depths of carrier traps are decreased due to high electron affinity caused by the introduction of PPy@PS-NPs, but the trap density is increased. The reported strategy of using functionalized polymer nanoparticles to improve the polymer insulation property provides new insights for developing future high-insulation materials and other functional materials based on functionalized polymer nanofillers.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Tiansheng Liu,Na Liu,Qingda An,Zuoyi Xiao,Shangru Zhai,Zhongcheng Li
The unique features of 2D layered structure, native defects and abundant functional groups provide special peculiarities for exploring Ti 3 C 2 T x MXenes in microwave absorption field. Nonetheless, both bad conductivity and poor impedance matching of Ti 3 C 2 T x MXenes lead to relatively poor EM absorption performance. Herein, by modifying Ti 3 C 2 T x MXenes with conductive PPy microspheres , a new core-shell like delaminated structure composites were fabricated for significant enhancement of absorption performance. It demonstrated that the obtained Ti 3 C 2 T x @PPy composites showed excellent microwave absorption performance due to synergistic effect between Ti 3 C 2 T x and PPy microspheres. The 10 wt% Ti 3 C 2 T x @PPy composites in wax matrix displayed a minimum reflection loss (RL) of −49.5 dB at 7.6 GHz with 3.6 mm in thickness, and the effective absorption bandwidth was 5.14 GHz from 6.44 to 11.58 GHz. The widest effective absorption bandwidth was 6.63 GHz from 8.55 to 15.18 GHz, the RL reached −42.6 dB in 12.4 GHz at only 2.7 mm matching thickness. More importantly, the composites can cover 4–18 GHz by simply adjusting matching thickness of 2–5.5 mm. The fantastic absorption performance could be ascribed to the unique properties of Ti 3 C 2 T x MXenes and heterojunction in Ti 3 C 2 T x @PPy, which might be a promising material in microwave absorption applied aspects.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wenyu Bai,Guangpeng Ma,Xinpu Zhou,Tongtong Gao,Yu Luo,Di Yu,Shuang Wang
Traditional two-dimensional transition metal carbides/nitrides (MXene) have gained much academic concern due to their excellent physicochemical properties, but their susceptibility to self-stacking leads to poor cyclic stability. In this paper, an MXene-based electrode active material was successfully prepared. The generated modified PPy (g-PPy) increases the active site, increases the accessibility of ions, and can give full play to the pseudocapacitance. By the combination of modified PPy (g-PPy) nanoparticles with pseudocapacitive behavior polymerized in situ on sulfonated cellulose (SC) and MXene , not only the electrochemical performance was improved by exploiting the synergy between different electrode materials and different energy storage mechanisms, but also the MXene as a skeleton limited the volume expansion and contraction of PPy during charge/discharge cycles and the g-PPy and SC composites (g-PPy@SC) as a spacer supported the MXene layer, resulting in much higher cycle stability. Cycle stability of 98.4 % even after 10,000 cycle tests. In addition, a symmetric supercapacitor assembled from this electrode material maintains a stability of 84.4 % under 10,000 cycles at a low temperature of −40 °C. Therefore, this study provides a feasible method for the preparation of MXene-based electrodes with high cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Wenjie Zhao,Meng Zhou,Lizhang Lv,Heqing Fu
Self-healing hydrogel has become a hot spot for various practical applications such as biomedical materials and electron devices. However, developing composite hydrogels with self-healing, conductive, magnetic and other properties still remains a serious challenge. In this paper, we developed self-healing, conductive and magnetic ZnFe 2 O 4 /MCNT/PPy ternary composite hydrogels based on PVA . The composite hydrogels possessed several features including a high stretchability (about 800%), good electrical conductivity (0.3465 S m −1 ) and nice magnetism (4.10 emu g −1 ). Furthermore, the composite hydrogels exhibited excellent self-healing property owed to the dynamic interactions (boric acid ester bonds and hydrogen bonds). Due to the conductivity, magnetism, self-healing and other properties, the novel composite hydrogels were expected to be a promising material in many advanced applications, such as electronic skins, drug delivery carriers and electromagnetic interference shielding . In addition, we have reason to believe that the biocompatibility and easy-remolding property of the composite hydrogels would make them a great candidate for 3D printing technique of human organs.
研究领域:
材料科学
·
生物医学工程
·
电子器件
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Y.H. Lei,G.J. Ye,B.C. Jiang,L. Wen,X.C. Mo,X.J. Lei,Y.L. Zhang,Y. Yuan,X.T. Chang
Developing a superhydrophobic a superhydrophobic anti-icing coating with robust mechanical attributes and chemical resilience is essential for effective anti-icing protection. This study employed fluorine-modified epoxy resin as the resin matrix and Fe 3 O 4 @PPy as the photothermal filler to fabricate an ice-resistant superhydrophobic coating, renowned for its exceptional mechanical endurance and corrosion resistance. With its unique micro-nano structure, the resulting coating exhibited an impressive contact angle (CA) of 158.7° and a minimal sliding angle (SA) of <1°. Even after enduring 260 cycles of sandpaper abrasion and tape peeling tests, the coating retained a CA of 157.8° and 154.2° respectively, demonstrating remarkable mechanical durability. The Fe3O4@PPy coatings exhibit excellent ice resistance with water droplets frozen time prolonging to 524 s at −20 °C. Moreover, when exposed to a light intensity of 100 mW/cm 2 , the coating rapidly heated to 82.4 °C, effectively facilitating de-icing and defrosting, while reducing ice adhesion strength by 88.4 %, underscoring its exceptional anti-icing efficacy. These findings underscore the potential of durable and chemically stable anti-·icing coatings to deliver sustained anti-icing benefits and hold promising practical applications.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 2
·1777-1784
·
IF 1.798
Chang Chengshuai,Yang Xuena,Xiang Shisen,Que Haoan,Li Mei
Using polypyrrole (PPy) nanotubes as the substrate, the layered molybdenum disulfide (MoS 2 ) nanosheets were wrapped on PPy nanotubes to form MoS 2 /PPy nanocomposites by a hydrothermal reaction. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images showed that MoS 2 nanosheets coated uniformly on the surface of PPy nanotubes owing to the electrostatic force. The specific capacitance of the MoS 2 /PPy nanocomposites was high up to 307.5 F g −1 , much higher than that of the pure PPy with specific capacitance of 106.3 F g −1 and MoS 2 with specific capacitance of 138.5 F g −1 at a current density of 1.0 A g −1 in 1 M KCl electrolyte. And the special structure of MoS 2 /PPy nanocomposites electrode reduces the deformation during the charge–discharge process and thus improves the rate stability and electrochemical cycling stability of the electrode significantly. The specific capacitance retains 96.47 % after 1000 charge–discharge processes which provides potential as supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Cui,Hongda Xu,Liming He,Ruifen Guo,Quan Jin,Xiaolong Wang
In this paper, layered porous SiC scaffolds were prepared by freeze casting and sintering, and then followed by loading polypyrrole (PPy) on its surface by in-situ polymerization to obtain porous SiC/PPy composites with different PPy content. The loaded PPy forms a good three-dimensional (3D) conductive network, thus the electrical conductivity and the dielectric loss capability of the sample is improved. Moreover, the porous structure provides more SiC-PPy heterogeneous interfaces for charge accumulation, leading to interfacial polarization and relaxation, further enhancing the microwave absorption performance. Compared with pure SiC particles, SiC/PPy-25 shows an increase in the minimum reflection loss (RL) from −8.64 to −39.1 dB, effective absorption bandwidth (RL < −10 dB) of 4.72 GHz, and comparatively thinner matched thickness of 1.7 mm. We provide a microwave absorption material with simple synthesis, high efficiency and wide application prospect.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 48
·51367
·
IF 3.125
Yujiao Gao,Dongning Liu,Yuanyuan Xie,Yiheng Song,Enwen Zhu,Zhuqun Shi,Quanling Yang,Chuanxi Xiong
In recent years, the wearable electronic skin (E-skin) has attracted more and more attention due to high sensitivity, good portability and flexibility. In this work, we used the 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN) as the substrate, and used the in-situ polymerization method to introduce polypyrrole (PPy) into the TOCN substrate. Then, the nylon gauze was used as microstructure template to prepare a TOCN/PPy E-skin with a surface microstructure. This E-skin possessed excellent sensing and mechanical properties. In the pressure range of 0–600 Pa, the sensitivity of E-skin was 3.13 kPa −1 . In addition, the E-skin exhibited ultrafast response/recovery time (≤10 ms), ultralow detection limit of 0.3 Pa, good stability (>9000 cycles) and mechanical strength of up to 117 MPa. Therefore, the TOCN/PPy E-skin has broad development prospects in the fields of artificial intelligence and health monitoring.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）