Solar RRL
·
2021
·Vol. 6
·期 4
·2100924
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IF 8.582
Xingyun Ye,Zhuoyue Tian,Xiaoyin Cao,Yukang Fan,Peilei Zhou,Chengjun Wang,Jiyan Li,Hanxue Sun,Zhaoqi Zhu,Weidong Liang,An Li
The development of phase change materials (PCMs) composites with high light-to-thermal energy conversion efficiency is of great importance for solar energy storage. Herein, the preparation of novel PCMs composites by incorporation of fatty amines (FAs) into the carbon membranes (CMs) with aligned nanochannels network is first reported, which is obtained by employing an anodic alumina oxidation membrane as sacrificing template and using polypyrrole and asphalt as carbon precursor via a simple carbonization treatment. The carbonized membranes possess abundant porosity and aligned nanochannels, which is beneficial to harvest solar light combined with their carbon in nature. In addition, organic PCMs, i.e. 1-Hexadecanamine (HDA, ΔH = 311.1 kJ/kg) and 1-Aminoheptadecane (AHD, ΔH = 293.0 kJ/kg) can be spontaneously loaded into the nanochannels of CMs by the capillary action and surface tension. The fabricated FAs/CMs composites present an enhanced thermal conductivity ranging from 0.291 to 0.525 W m −1 K −1 . Compared to pure FAs, the thermal conductivities of the PCMs composites are 144.8–357.1% higher than that of the control. Meanwhile, the as-synthesized FAs/CMs composites also exhibit a remarkable high photothermal energy storage efficiency of up to 93.8%, which is one of the highest values reported to date, making them promising candidates for a broad range of applications in solar energy harvesting, conversion, and storage.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Xiaojie Cheng,Jiahui Liao,Yue Xue,Qingquan Lin,Zhaomei Yang,Guilong Yan,Guangyong Zeng,Arijit Sengupta
Membrane separation technology is considered as one of the most promising wastewater treatment technologies. However, difficulties in thorough water purification and poor fouling resistance in practical applications are some of the major concerns associated to membrane-based water purification. In the present investigation, a combination of efficient and environmentally friendly photocatalysis technology has been adopted for the fabrication of a series of [email protected] multifunctional photocatalytic composite membranes by stacking MXene nanosheets and BiOCl-PPy photocatalytic nanoparticles on polyethersulfone (PES) substrates. The composite membranes with BiOCl-PPy nanoparticles exhibited excellent permeation performance with pure water (flux of 3680.2 L m −2 h −1 ). Moreover, the composite membranes achieved 99.9% of combined removal rate for three different dyes and 96% for antibiotic (Tetracycline Hydrochloride) by physical sieving and photocatalytic degradation. The self-cleaning mechanism of composite membranes maintained good long-term permeability and selectivity during the cyclic tests. Hence, the service life of the membrane under visible light irradiation has been significantly improved without any compromise on the membrane performance. The density functional theory (DFT) calculation has been utilized to understand the mechanism in enhancing the photocatalytic activity of the composite membrane.
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高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
Weikang Zheng,Zongyang Li,Guang Han,Qiannan Zhao,Guanjie Lu,Xiaolin Hu,Jing Sun,Ronghua Wang,Chaohe Xu
Lithium-ion capacitors (LICs) have become one of the most popular energy storage devices because of the combination of high energy densities and power densities. However, the kinetic imbalance of anode and cathode restricts the specific capacities and voltage windows of LICs. Herein, an in-situ nitrogen-doped activated porous carbon (ANMPC) material with high specific surface area (1894.9 m 2 /g) is proposed to act as both cathode and anode for the preparation of the 4.5 V “all carbon” LICs. The hierarchically porous ANMPC obtained by KOH activation and carbonization of polypyrrole (PPy) has plenty of mesopores created by surfactant (added during the PPy process) as well as micropores generated by KOH activation, thus can provide abundant active sites for ion intercalation and large area for electrostatic adsorption simultaneously, satisfying the critical requirements of high-performance anode and cathode, respectively. After coupling the pre-lithiated ANMPC anode and fresh ANMPC cathode, the complete LIC device delivers large energy density of 167.5 Wh/kg at a power density of 269.0 W/kg, and still remains 88.9 Wh/kg at an ultrahigh power density of 13,198.5 W/kg, exhibiting enormous potential for applications in high performance lithium-ion capacitors.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Bingfeng Li,Xingxing Yin,Shuaiya Xue,Peng Mu,Jian Li
Corrosion is an inevitable and thorny problem when magnesium (Mg) alloys are used in marine environments. Superhydrophobic coatings have great potential for metal corrosion protection due to their superhydrophobicity and self-cleaning properties. However, the poor mechanical stability of the surface seriously hinders the practical application. Herein, a robust superhydrophobic graphene oxide (GO)/polypyrrole (PPy)-zeolitic imidazolate framework-8 (ZIF-8) dual-layer coating was prepared on the surface of magnesium (Mg) alloy by electrodeposition and spraying method, which was composed of a bottom GO layer and a upper superhydrophobic PPy/ZIF-8 layer. The GO layer extends the transmission path of corrosion ions and the superhydrophobic coating prevents the contact between the Mg alloy and the corrosive solution. In addition, the dual-layer superhydrophobic coating has excellent self-cleaning and mechanical properties. More importantly, the as-prepared coating can withstand 3.5 wt% NaCl solutions for 120 h and still maintain good corrosion resistance. Furthermore, the GO layer and the superhydrophobic layer have a synergistic effect, which significantly improves the corrosion resistance of Mg alloys. The facile method and superhydrophobic dual-layer coatings will have good application prospects on a variety of metal substrates.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
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IF 6.707
Xin Jiang,Sanmei Liu,Wen Wang,Shunli Shi,Zhenxing Zeng,Chao Chen
Photocatlytic water disinfection for pathengenic miroorgasnisms removal is of great importance to public health safety, however the photocataltyic performance is unsatisfactory due to the low reactive oxygen species (ROS) generation. In this work, an innovative energy-transfer-mediated oxygen activation system on PCN-224-Zn is proposed for selective singlet oxygen generation without the need of electron-hole separation. The as-prepared PCN-224-Zn exhibits remarkable singlet triggered photocatalytic E-coli inactivation and organic pollutant degradation performance. The enhanced photocatalytic activity is attributed to the introduction of Zn into the metal-organic frameworks (MOFs) that facilitates the transformation of electron-hole couple from singlet to triplet state for selective singlet oxygen generation with high efficiency. This work provides a new oxygen activation pathway for efficient and selective ROS generation without the need of electron-hole separation.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
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IF 8.198
Wendong Zhu,Ya Cheng,Ce Wang,Xiaofeng Lu
The exploration of novel nanozymes with a high catalytic efficiency is crucial for their biosensing applications. Intricate hollow nanostructures possess distinct hierarchical open and porous features, usually presenting fascinating physicochemical properties. In this work, we have demonstrated the fabrication of a hierarchical fiber-in-tube CuFe2O4@conducting polypyrrole (PPy) nanostructure for peroxidase mimicking. Owing to the unique confined structure and synergistic effect, an exceptional peroxidase-like performance of CuFe2O4@PPy is achieved compared with the pristine CuFe2O4 nanofibers and PPy nanotubes alone. The prepared catalyst displays a desirable long-term and cycling stability. The experimental results demonstrate the key role of the formation of hydroxyl radicals for peroxidase mimicking. Based on the outstanding peroxidase-like activity, a high-efficiency ascorbic acid (AA) colorimetric sensor is developed, also displaying a satisfactory selectivity. Furthermore, according to the high sensitivity of the CuFe2O4@PPy nanotubes to detect AA, a total antioxidant capacity (TAC) sensor for a series of real samples has been developed. This work provides a new approach to construct efficient nanozymes with high efficiencies and develop a simple TAC assay with further vision in the fields of biosensing and food technology.
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高影响因子
CHEMOSPHERE
·
2021
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IF 7.086
Tianmeng Zhang,Haimeng Huang,Weiwei Zhang,Zhiyong Lu,Mingxia Shen,Tao Liu,Jie Bai,Yan Yang,Jianfeng Zhang
The development of low cost and environmental-friendly materials has long been an ambition for effective removal of dye pollutants in complex water environments. In this study, a free-standing separation film of bacterial cellulose reinforced/functionalized by graphitic phase carbon nitride is developed by a facile suction filtration strategy, of which the former is precoated by polypyrrole , and the latter is pre-doped by oxygen to endow the as-obtained film an enhanced photocatalytic performance and self-cleaning ability. The as-obtained film exhibits a high tensile stress of 51.8 ± 1.1 MPa, and a high resistance to cold, heat, acid and alkali. For typical dyes of methylene blue and rhodamine B, a high dye rejection rate of 99.9% at 138 L/m 2 •h•bar feed flux is obtained by the as-obtained film. Even at a salt concentration higher than 5%, it still maintained high dye removal rates and achieves effective separation of dye and salt. Simultaneously, a high dye photocatalytic degradation of the composite films rates up to 98% in only 90 min, and a high self-cleaning ability demonstrated by recovery of flux after light treatment in cyclic tests. The density functional theory calculation validates the beneficial effects of improved light response range and separated photogenerated electron/holes for the effective degradation of dyes by oxygen-doped carbon nitride coupled with one-dimensional polypyrrole chains. Overall, this study proposes a new direction for the separation of dye pollutants with a high visible-light self-cleaning capacity by structural tailoring of bacterial cellulose with carbon nitride.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Gaosheng Li,Yujiao Gao,Chenyu Sun,Fukun Niu,Zhuqun Shi,Quanling Yang,Chuanxi Xiong
Flexible sensors based on biological hydrogels have gained significant attention in the fields of wearable devices , human-computer interaction robots, and medical monitoring. Nanocellulose , a natural polymer material, offers advantages such as low cost, abundant reserves, green environmental protection, and renewability. However, the high water content of the nanocellulose-based flexible sensor limits its application at low temperatures, making it difficult for the nanocellulose-based hydrogel electronic skin to function properly. To enhance the hydrogel's anti-freezing and anti-drying properties, we introduced glycerol (GL) into the in-situ grown polypyrrole (PPy) hydrogel of 2,2,6,6-Tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized cellulose nanofibril (TOCN) and obtained the organic hydrogel TOCN/PPy/GL. The prepared TOCN/PPy/GL organic hydrogel maintains excellent electrical conductivity , mechanical properties , and strain sensing capabilities (strain sensitivity GF=2.41 at −45 ℃, response time 100 ms, recovery time 200 ms). The TOCN/PPy/GL organic hydrogel electronic skin also exhibited exceptional anti-drying property, with a volume retention of 66.75% after 24 h at 100 ℃, which is six times higher than the volume retention of TOCN/PPy hydrogel without GL under the same conditions.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Lizhong He,Zengpeng Guo,Najeeb ur Rehman Lashari,Gexi Wang,Mengbin Li
To cater to the mushrooming advanced energy storage devices need, designing and preparing novel electrode materials with excellent electrochemical properties (including high capacitance and prominent cycling stability) are urgent but challenging. Here, we successfully synthesized 3D hierarchical NiCo 2 O 4 @Co 3 S 4 @MnS@PPy (NC@CS@MS@PPy) core-sheath nanowire arrays grown on highly conductive carbon cloth using a multistage process. Owing to a lot of synergy between the multiple components in the as-obtained composite, the prepared electrode material indicates an excellent specific capacitance of 2.67 F cm −2 at 1 mA cm −2 or 2557.58 F g −1 at 1 A g −1 and high cycling stability (83.64 % capacitance retention after 20,000 cycles even at a high current density of 20 mA cm −2 ). When coupled with the activated carbon (AC, as a negative electrode), the assembled all-solid-state NC@CS@MS@PPy//AC asymmetric supercapacitor (ASC) device showed outstanding electrochemical properties with a high area specific capacitance 684.38 mF cm −2 at 3 mA cm −2 and better long-term cycling stability (96.76 % retention of the initial capacitance after 20,000 cycles). More importantly, by taking advantaging of the multiple compositional merits and structural features of the positive electrode , the device delivered the highest energy density of 81.1 Wh kg −1 at 800 W kg −1 and retained 26.2 Wh kg −1 at the highest power density of 16 KW kg −1 . Furthermore, two ASCs connected in series powered 20 red light-emitting diodes (LEDs) for >10 min. This work manifests that the prepared hierarchical NC@CS@MS@PPy core-sheath nanowire arrays have impressive potential as high-performance electrodes for supercapacitor.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
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IF 7.7
Shuxia Li,Jia-Horng Lin,Hai-Tao Ren,Bing-Chiuan Shiu,Fei Sun,Ching-Wen Lou,Ting-Ting Li
Oil spills and the discharge of organic wastewater have posed a severe danger to environmental security. To address this issue, various functional oil/water separation materials for wastewater purification have been developed. In this work, MXene/PPy was loaded on PP fiber by simple in-situ polymerization and vacuum-assisted filtration technology. Polypropylene was modified by dopamine (PDA) through in-situ polymerization, to improve the loading fastness of MXene/PPy on the surface of PP. To increase the durability of the fiber membrane, the pH-responsive polymer (PDM) was simply immersed on the outer layer. The successfully prepared PP-MXene/PPy-PDM has excellent pH response and photothermal conversion performance. When pH= 2, the water contact angle (WCA) was 52°. When pH= 12, WCA was 125°. The surface of PP-MXene/PPy-PDM was heated to 104.6 ℃ in ten minutes under the irradiation of 2 kW·m −2 . PP-MXene/PPy-PDM could continuously separate oil/water mixture for 12 h, and the highest separation flux was 3.87 kg·m −2 ·h −1 . Moreover, PP-MXene/PPy-PDM has excellent stability, corrosion resistance and recyclability . This study provided a new strategy for preparing intelligent responsive fiber composite membrane for oil-water separation, which has a wide range of practical applications in the treatment of oily wastewater.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
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IF 7.7
Chi Zhang,Ye Chen,Qing Wen,Yang Yang,Desong Qiao,Linhan Zhong,Cen Bi
The limited power output of microbial fuel cells (MFCs) has impeded their widespread adoption application. Thoughtful selection of a suitable anode material not only enhances extracellular electron transfer (EET) efficiency but also stimulates microbial adhesion and proliferation. Herein, a three-dimensional conductive polymer hydrogel MXene/(polypyrrole)-(polyacrylamide) (MPP) is proposed, which can enhance the power generation performance of the bioanode by promoting the enrichment of microorganisms in the two-dimensional direction. The integration of hydrogel molecular chains within the layers of MXene effectively inhibits the self-aggregation of MXene layers, thereby facilitating the formation of ion transport channels for expedited charge storage. As a result, the maximum power density increases from 3.12 W/m 3 (CF) to 6.71 W/m 3 (MPP-25), the protein content of MPP-25 bioanode (59.66 ± 2.39 mg/cm 2 ) is 3.34 times higher than that of CF (17.85 ± 1.53 mg/cm 2 ), and the exchange current density value increases from 0.06 mA/cm 2 (CF) to 0.26 mA/cm 2 . Conductive hydrogels prepared by MXene as a modifier are a promising bioelectrocatalyst for high-performance MFCs.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Desen Zhou,Xuan Zhang,Zheng Li,Jun Zhang,Tielin Wang,Shaowen Cao
Photocatalytic conversion of CO 2 to usable fuels provides a new strategy for solving energy problems and the greenhouse effect. Porphyrin-based metal-organic frameworks (MOFs) are promising in photocatalysis due to their remarkable light harvesting ability, and the metal active site and its coordination environment can be further adjusted to achieve the high activity. In this work, g-C 3 N 4 /PCN-222 composites with different porphyrin metal centers were fabricated and the g-C 3 N 4 /PCN-222(Fe III ) catalyst showed the highest photocatalytic CO 2 reduction performance than that of g-C 3 N 4 /PCN-222(Fe II ) and other g-C 3 N 4 /PCN-222( M , M = Co, Ni, Cu, Zn) composites. Experimental studies and theoretical calculations showed that the axial coordination in g-C 3 N 4 /PCN-222(Fe III ) distorts the square planar field (Fe-N4) to quasi-octahedral coordination, which led to the moderate adsorption ability of CO 2 reduction intermediate (*CO), resulting in the high photocatalytic activity.
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高影响因子
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