RSC Advances
·
2023
·Vol. 13
·期 41
·29061-29069
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IF 3.9
Xixi Wu,Huazhen Liang,Chaoming Li,Duanyang Zhou,Rui Liu
The specific tumor microenvironment is a conducive breeding ground for malignant tumors, favoring their survival, rapid proliferation, and metastasis, which is also an inevitable obstacle to tumor treatment, particularly for catalytic therapy. To address this issue, a hyperthermia-enhanced nanocatalyst (AuP@MnO2) consisting of an asymmetric Au@polypyrrole core and a MnO2 shell is constructed for synergistic cancer Fenton/photothermal therapy. In an ultra-short reaction time (15 min), the innovative introduction of a new oxidizer, tetrachloroauric acid trihydrate, not only successfully initiates the oxidative polymerization of pyrrole monomer while reducing itself to cubic Au, but also accelerates the polymerization process by supplying protic acid. After MnO2 coating, AuP@MnO2 catalyzes the conversion of antioxidant GSH and excess H2O2 into GSSG and ˙OH through Mn2+/Mn4+ ion couples, leading to oxidative damage of tumor cells. More importantly, after 1064 nm laser irradiation, more extreme oxidative imbalance and cell death are demonstrated in this work under the combined effect of photothermal and catalytic therapy, with insignificant toxicity to normal cells. This work develops an efficient one-step synthesis method of asymmetric Au@polypyrrole and provides constructive insight into its oxidative stress-based antitumor treatment.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yanhua Lei,Jie Wang,Bochen Jiang,Hui Liu,Mengchao Ding,Yuliang Zhang,Yuan Yuan,Guanhui Gao
Extensive research is being conducted on a promising technology that utilizes solar energy and photothermal materials to address the global challenges of freshwater scarcity and energy shortage. Real-world applications of this technology require materials with specific properties such as mechanical flexibility and antimicrobial characteristics. Herein, a self-supporting membrane for interfacial photothermal water evaporation is developed, incorporating bacterial cellulose (BC) as a resilient and hydrophilic backbone material, along with Polypyrrole（PPy）loading and silver nanoparticles (Ag NPs) doping. The addition of Ag NPs not only enhances the antibacterial properties of the material, but also improves light absorption through plasma resonance, resulting in enhanced photothermal conversion efficiency. Experimental results demonstrate that the BC/Ag/PPy hybridized membrane exhibits an outstanding photothermal evaporation efficiency of 91%. Additionally, the membrane maintains a stable evaporation rate and favorable mechanical properties. With its exceptional performance, this BC/Ag/PPy membrane offers a practical solution for long-term seawater desalination applications.
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VACUUM
·
2023
·
IF 4
Jingyan Tian,Leilei Zhang,Junnan Li,Lian Ma,Jianhao Wang,Zebin Chen,Yuping Wu,Qianting Wang,Xiaoyun Ye
With the development of radar stealth technology and electronic communication technology, electromagnetic (EM) wave absorbing materials with lightweight and broad absorbing bandwidth are widely expected. In this study, the multi-walled carbon nanotubes (MWCNTs)/reduced graphene oxide (rGO)/polypyrrole (PPy) ternary composites were prepared by in-situ polymerization under hydrothermal conditions. The effects of carbon substrate of MWCNTs/rGO and the content of PPy on the microwave absorption (MWA) properties of the ternary composites and the corresponding attenuation mechanism were investigated. The results showed that MWCNTs and rGO nanosheets interweave together to form a relatively uniform micro-network structure with even wrapping of PPy on the surface of MWCNTs/rGO substrate. The adjustable amount of PPy optimizes the impedance matching and EM wave attenuation capacity. The composites achieve effective absorption bandwidth (EAB) of 4.6 GHz at 2.1 mm, and the minimum reflection loss (RL min ) value of −57 dB at 15.8 GHz. The multi-void network structures formed by MWCNTs and lamellar rGO and the interfacial polarization between MWCNTs/rGO composite carbon substrate and PPy can effectively decay EM wave absorption, thus improving the MWA performance of the composites. This work provides an effective reference for the application of multi-component carbon composites in the field of microwave absorption.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Guangli Li,Xiaoman Qi,Jingtao Wu,Xuan Wan,Tianyu Wang,Ying Liu,Yuwei Chen,Yonghui Xia
The overuse of pefloxacin (PEF) leaves residues in foods. Therefore, the development of robust analytical techniques for the selective detection of PEF is of great importance. In this study, a highly stable electrochemical sensing platform has been constructed, using molecularly imprinted polymer (MIP)-coated gold nanoparticle/black phosphorus nanocomposites (BPNS-AuNPs), for the selective detection of PEF. BPNS-AuNPs significantly enhance the black phosphorus (BP) stability and electrochemical activity and offer a larger surface area to accommodate more imprinted sites for selective PEF binding. MIP/BPNS-AuNPs exhibit a broad linear detection range (0.005–10 μM), low detection limit (0.80 nM), and high sensitivity (3.199 μA μM −1 ). The MIP/BPNS-AuNPs show a high binding affinity for PEF, even in the presence of structural analogs, and maintain stable voltammetric signals for at least 35 d. The MIP sensor exhibits consistent high sensitivity in the detection of PEF in real milk and orange juice samples.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 47
·25887-25898
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IF 11.9
Fei Peng,Wenbo Zhu,Bicheng Fu,Yi Fang,Zhipeng Peng,Jingjing He,Hongtao Chen,Hongjun Ji,Chunjin Hang,Mingyu Li
Multifunctional hybrid aerogels with high electromagnetic interference (EMI) shielding and Joule heating properties are urgently demanded for modern microelectronic devices and wearable electronics, especially for use in an extreme environment. Here, we demonstrated a facile method to fabricate multifunctional silver nanowire (AgNW)@polypyrrole (PPy) core–shell hybrid aerogels with superelasticity and high electrical conductivity for highly efficient EMI shielding and Joule heating. The PPy can weld the adjacent AgNWs to form core–shell structures, which could resist interfacial slip during compression and provide extra channels for electron conduction, enhancing the compressive modulus (75 times increase compared to pure AgNW aerogel), elasticity (97.6% height retention after 1000 cycles of 50% strain compression), and electrical conductivity (4554 S m−1) of the aerogels. The hybrid aerogels demonstrate superb EMI shielding performance (SET of 100.9 dB at 1 mm and SSE/t of 134 029 dB cm2 g−1) and impressive Joule heating properties with ultralow-driven-voltage (238.5 °C at 1.2 V) and rapid heating rate (390 °C s−1). They also exhibit superhydrophobicity (contact angle of 154.7°) and excellent stability in harsh environments. With these extraordinary comprehensive properties, the AgNW@PPy hybrid aerogels demonstrate great potential for electromagnetic pollution protection and personal thermal management in aerospace and wearable electronic devices.
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Nano-Micro Letters
·
2023
·Vol. 15
·期 1
·1-15
·
IF 26.6
Yu Zhen,Su Yuqing,Gu Ruonan,Wu Wei,Li Yangxi,Cheng Shaoan
Micro–nano water film enhanced interfacial solar evaporator enables a high evaporation rate of 2.18 kg m −2 h −1 under 1 sun.
An outdoor device with an enhanced condensation design demonstrates a high water production rate of 15.9–19.4 kg kW −1 h −1 m −2 .
A multi-objective predictive model is established to assess outdoor water production performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Mengxue Chen,Khalid Umer,Bonan Li,Zhexu Li,Kongming Li,Wanjun Sun,Yong Ding
The growing concern over the rapid consumption of fossil fuels has spurred scientists to seek environment-friendly and sustainable energy alternatives. The utilization of photocatalytic water splitting shows great potential in generating environmentally friendly hydrogen energy. Zirconium-based porphyrin MOF-545 has drawn extensive attention in photocatalysis since it has strong light absorption and fast electron transfer capability. A series of Zr-based metalloporphyrins containing different metals, MOF-545M (M = Co, Ni, Cu, Zn), were synthesized and assembled with solid solution Zn x Cd 1-x S (ZCS) nanoparticle to develop the corresponding of hybrid photocatalysts , ZCS/MOF-545M. Various characterizations show that introducing the porphyrin MOF-545Co not only improve the visible light response range of Zn 0.5 Cd 0.5 S (ZCS-0.5) but also enhance the carrier separation efficiency of ZCS-0.5. The carrier transfer direction during the reaction was confirmed by surface photovoltage spectroscopy and shows the formation of S-scheme. Under visible light irradiation , the hybrid photocatalyst ZCS-0.5/MOF-545Co exhibits a high H 2 evolution rate of 148 μmol h −1 , with increases of 52.8, 22.9 and 6.5 times than those of bare ZnS, CdS and ZCS-0.5, respectively. The present work gives a strategy for erecting S-scheme heterojunction to inhibit the photocorrosion of metal sulfides and enhancement the carrier separation efficiency.
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Journal of Energy Storage
·
2023
·
IF 9.4
Jinghao Huo,Xin Wang,Xinyi Zhang,Lifeng Zhang,Gentian Yue,Shouwu Guo
Aqueous zinc-ion hybrid supercapacitors (ZISCs) are a kind of energy storage device with promising applications due to their easy assembly, low cost, safety and reliability. Polypyrrole (PPy)-derived carbon is usually used as a cathode material for ZISCs with N-doping originating from the polymer structure and simple preparation. Herein, the porous PPy-derived carbon nanotubes (PCNTs) are prepared by calcination and KOH activation. The microstructure and physicochemical properties of PCNTs can be optimized by regulating the mass ratio of KOH to PPy-derived carbon. The high specific surface area (3537 m 2 g −1 ), hierarchical porous structure , and high contents of O/N-codoping (12.02 at.% and 3.39 at.%), the PCNTs process high specific capacity and excellent cyclic stability. ZISCs based-PCNTs cathode and Zn anode obtain a high specific capacity of 387.8 mAh g −1 at a current density of 0.2 Ag −1 , superior rate capability (127.2 mAh g −1 at 20 Ag −1 ), large energy density (151 Wh kg −1 ), and power density (12.695 kW kg −1 ). Furthermore, after 10,000 GCD tested at 5 A g −1 , the capacity retention of ZISCs is 90.9 %. This study provides a valuable reference for regulating the microstructure of porous carbon derived from other polymers and promoting its application in aqueous ZISCs.
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Journal of Energy Storage
·
2023
·
IF 9.4
Shuzhen Cui,Yaya Lv,Wenxing Miao,Wenbo Hou,Xiangbing Wang,Qinzheng Hu,Kanjun Sun,Hui Peng,Guofu Ma
Conventional polyvinyl alcohol-based gel electrolytes are generally limited in ionic conductivity and cannot well meet the requirements of the self-healing and flexible smart device . Herein, we design a highly conductive hydrogel electrolyte (ionic conductivity up to 84 mS cm −1 ), based on cross-linked aqueous acrylamide (AAm) solution in the presence of poly(N-vinylpyrrolidone) (PVP), with excellent self-healing capability by intermolecular hydrogen bonds between PVP and PAM. The self-healing all-in-one flexible supercapacitor fabrication with the gel electrolyte and in-situ polymerization polypyrrole (PPy) electrode can achieve repeated healable 5 cycles without extra addition, stretch up to 750 % compared with the original lengths and bend different angles with slight performance decay. This work provides new idea for the synthesis of highly conductive, self-healing and flexible hydrogel electrolyte to promote the development of all-in-one supercapacitor with high specific capacitance for practical applications in flexible and wearable electronics .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Peng Song,Congcong Li,Xiaohui Yao,Dongyang Zhang,Ningmiao Zhao,Yue Zhang,Keqiang Xu,Xiaojuan Chen,Qi Liu
Planar wearable supercapacitors (PWSCs) have sparked intense interest owing to their hopeful application in smart electronics. However, current PWSCs suffered from poor electrochemical property, weak flexibility and/or large weight. To relieve these defects, in this study, we fabricated a high-performance PWSC using silk protein derived film electrodes (PPy/RSF/MWCNTs-2; RSF, PPy and MWCNTs represent regenerated silk film, polypyrrole and multi-walled carbon nanotubes, respectively, while 2 is the mass ratio of silk to MWCNTs), which were developed by ‘dissolving-mixing-evaporating’ and in situ polymerization. In three-electrode, PPy/RSF/MWCNTs-2 showed a superb area specific capacitance of 8704.7 mF cm −2 at 5 mA cm −2 , which surpassed numerous reported PWSC electrodes, and had a decent durability with a capacitance retention of 90.7 % after 5000 cycles. The PPy/RSF/MWCNTs-2 derived PWSC showed a largest energy density of 281.3 μWh cm −2 at 1660.1 μW cm −2 , and a power density as high as 13636.4 μW cm −2 at 125.6 μWh cm −2 . Furthermore, impressive capacitive-mechanical stability with a capacitance retention of 92 % under bending angles from 0 to 150 was depicted. Thanks to the rational and affordable preparation, our study for the first time prepared RSF electrode that had great capacitive property, high mechanical flexibility and light weight, simultaneously. The encouraging results can not only open up a new path to manufacture high-performance flexible electrodes, but may also help to realize the high-value-added utilization of silk.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoyue Ren,Qingli Tian,Xiaoshuai Zhu,Hao-Yang Mi,Xin Jing,Binbin Dong,Chuntai Liu,Changyu Shen
Commercial foam based piezoresistive sensors are promising flexible sensing units for wearable devices, while they suffer from relative low sensitivity, especially in low pressure range. Herein, inspired by scorpion slit organs, multi-scale closure piezoresistive sensors are developed by self-polymerization of a polydopamine (PDA) layer and a polypyrrole nanofibers (PPy NFs) layer on polyurethane (PU) foam, and constructing a macroscopic narrow orifice configuration (NOC), which allows the generation of a great mount of conductive paths at low pressure. The synergetic effects of inner space closure, pore collapse, and PPy NFs contact contributed to an ultra-high sensitivity of 0.8251 kPa −1 , which surpasses reported foam-based sensors. The developed NOC foam possesses fast response time and recovery time (120 ms and 100 ms), high linearity, and excellent stability. Moreover, the sensor can be used to precisely detect the human walking, running, and jumping behaviors, and the grabbing force. When integrated into a sensing array, the NOC PPP foams demonstrated excellent potential to be used in human activity monitoring such as yoga postures and sleeping positions. This work provides new thoughts for designing biomimetic highly sensitive piezoresistive sensors and enhancing the foam stability using PPy NFs.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yilin Wu,Xinlan Zhu,Dongyang Miao,Jun Song,Shaohai Fu,Jichao Zhang
Oily wastewater, resulting from oil recovery, petrochemical industries, or accidents, poses a significant threat to the aquatic environment. Membrane separation technology can offer unprecedented opportunities for highly efficient water remediation but at the cost of poor permeability and serious oil fouling. Here, we report a faveolate nanofibrous membrane through the steric growth of bismuth oxybromide-bismuth oxyiodide nanoflakes on the TiO 2 /polypyrrole nanofibers. The spatially faveolate cells create highly covered confined spaces that efficiently capture and coalesce nanosized oil droplets, thus achieving substantial selectivity for micron porous membranes. The faveolate membranes are capable of efficiently separating various oil-in-water emulsions, particularly nanoscale surfactant-stabilized emulsions with a high permeation flux of 6075 L m -2 h −1 and a good separation efficiency of 99.95 %. Moreover, the membranes with multi-heterostructure act as efficient photocatalysts, giving rise to visible light-induced sufficient fouling-tolerant property with nearly zero irreversible oil fouling. This study could provide a novel strategy for developing a new generation of membranes with high performance and long service lifetime for oily sewage remediation.
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危险品化学品经营许可证（带存储）