ACS Applied Energy Materials
·
2025
·
IF 5.5
Jiahui Li,Yali Wang,Xiaoxuan Fan,Yazhou Zhang,Jia-Horng Lin,Ting-Ting Li,Ching-Wen Lou
Wearable thermoelectric generators (TEGs) rely on significant thermal gradients. They are susceptible to ambient conditions, including temperature and humidity, which compromise their longevity, wearability, and breathability, thereby limiting their utility in human microenvironments. This study introduced a layer-by-layer assembled photothermoelectric fabric comprising poly(3,4-ethylenedioxythiophene)/carbon nanotubes/polypyrrole (PEDOT/CNT/PPy), engineered for self-powered electricity generation through the capture and conversion of environmental solar and thermal energy. Poly(3,4-ethylenedioxythiophene) was deposited on the fabric via low-temperature interfacial polymerization, incorporating carbon nanotubes to establish an organic/inorganic hybrid system, thereby enhancing the composite material’s overall thermoelectric performance. Subsequently, to enhance the thermal-to-electric conversion of the PEDOT/CNT thermoelectric fabric, it was integrated with polypyrrole, which exhibited superior photothermal conversion properties, constructing an organic/inorganic photothermoelectric fabric with a core–shell architecture to achieve an integrated light-to-heat, heat-to-electricity composite conversion. The PEDOT/CNT/PPy flexible photothermoelectric fabric achieved a maximum output voltage of 612.52 μV under infrared light irradiation and an output voltage of 270 μV under a temperature differential of 20 °C. Furthermore, a thermoelectric device assembled from three PEDOT/CNT/PPy strip fabrics affixed to the human arm generated an output voltage of 300 μV at room temperature. Consequently, the developed flexible photothermoelectric conversion fabric demonstrates potential for significant applications in innovative wearable technology and the sustainable energy sector.
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FirePhysChem
·
2026
·
IF 5.1
Yuqiao Liu,Yubei Lin,Rongyu Zhang,Juan Zhu,Yongjun Ma
In an effort to address the inherent trade-off between electrostatic safety and combustion performance in solid propellants, a series of CuCr₂O₄/polypyrrole (PPy) composite catalysts with tunable microstructures was designed in this study. CuCr₂O₄/PPy composite catalysts with CuCr₂O₄ loadings of 10, 30, and 50 wt% were synthesized via the hydrothermal method and in-situ polymerization. The microstructural evolution was characterized by electron microscopy, X-ray diffraction, and N₂ physisorption. These composites were incorporated at 2 wt% into GATo propellants, a Composite Modified Double-Base (CMDB) propellant, and their effects on electrical resistivity, thermal decomposition, burning rate, and sensitivities were systematically evaluated. The specific surface area of the composites decreased progressively from 52.7 m²/g (10 wt% CuCr₂O₄, 1#) to 38.1 m²/g (50 wt% CuCr₂O₄, 3#), confirming a microstructural transition from a continuous PPy network to agglomerated CuCr₂O₄ particles. The composite with low CuCr₂O₄ loading (10 wt%) imparted the lowest electrical resistivity and the most significant safety enhancement, while slightly improving the combustion performance of the GATo propellant: the negative electrostatic sensitivity threshold increased by 38% (from 1.78 J to 2.45 J), and the impact sensitivity threshold improved by 150% (from 4.0 J to 10.0 J). In contrast, the composite with high CuCr₂O₄ loading (50 wt%) achieved the highest combustion performance while reducing the sensitivity of the GATo propellant: the burning rate increased by 44% (from 3.79 to 5.47 mm/s), and the exothermic peak temperature decreased by 5.3°C.
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International Journal of Smart and Nano Materials
·
2023
·
IF 3.9
Bingkun Tian,Xiaofeng Jiang,Weicun Chu,Chunxiao Zheng,Wanlin Guo,Zhuhua Zhang
Developing high-performance nanostructured materials is key to deliver the potential of hydrovoltaic technology into practical applications. As single-component materials have approached its limit in generating hydrovoltaic electricity, the development of multi-component hydrovoltaic materials has been necessary in continuously boosting the electricity output. Here, we report a hydrovoltaic material by integrating reduced graphene oxides and polypyrrole nanoparticles (rGO/PPy), where the rGO contributes improved conductivity and large specific surface area while PPy nanoparticles enable enhanced interaction with water. The device fabricated with this material generates a short-circuit current of 6 μA as well as a maximum power density of over 1 μW/cm3 from natural evaporation of water. And the substantial ion–PPy interaction enables robust voltage generation from evaporation of various salt solutions. Moreover, an outstanding scaling ability is demonstrated by connecting 10 devices in series that generate a sustainable voltage of up to ~2.5 V, sufficing to power many commercial devices, e.g. LED bulb and LCD screen
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Polymers
·
2023
·Vol. 15
·期 8
·1866
·
IF 5
Huiru Yang,Aiping Wang,Xincong Feng,Hailing Dong,Tao Zhuang,Jing Sui,Shugao Zhao,Chong Sun
To meet the comprehensive demand for flexible microwave absorbing (MA) materials, a novel MA rubber containing homemade Polypyrrole nanotube (PPyNT) is produced based on the natural rubber (NR) and acrylonitrile-butadiene rubber (NBR) blends. To achieve the optimal MA performance in the X band, the PPyNT content and NR/NBR blend ratio are adjusted in detail. The 6 phr PPyNT filled NR/NBR (90/10) composite has the superior MA performance with the minimum reflection loss value of −56.67 dB and the corresponding effective bandwidth of 3.7 GHz at a thickness of 2.9 mm, which has the merits in virtue of achieving strong absorption and wide effective absorption band with low filler content and thickness compared to most reported microwave absorbing rubber materials over the same frequency. This work provides new insight into the development of flexible microwave-absorbing materials.
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PubMed
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 8
·5355-5371
·
IF 5.7
Yu Zhicai,Zhu Zhenyu,Wang Yushu,Wang Jinfeng,Zhao Yuhang,Zhang Jiale,Qin Yi,Jiang Qing,He Hualing
Wearable triboelectric nanogenerators (TENGs) as self-powered sensors to monitor human motion have acquired enormous research interest owing to their low cost and highly efficient mechanical energy-harvesting property. However, development of cellulose fabric-based TENGs with excellent breathability, durability, and shape adaptivity to minimize user discomfort remains a challenge. Herein, a flexible and stretchable cotton fabric-based single-electrode-mode TENG was developed for mechanical energy harvesting and self-powered sensing to detect human motion behaviors. Breathable cotton/ammonia (95% cotton, 5% spandex) blended composite fabric was employed as flexible electrode in TENG via in situ polymerization of polypyrrole, followed by spattering of silver nanowires. Afterward, the polytetrafluoroethylene layer was coated on the surface as a tribo-negative material. The prepared TENG can maintain a stable output voltage of approximately 0.3 V under a force of 4 N at 2.5 Hz frequency. The resulting TENG also exhibited excellent air permeability of 1329.134 mm/s, moisture permeability of 399.7 g/m 2 ·24 h, and cycle stability (above 4000 cycles) and can act as a wearable and sustainable power source for powering electronic devices. Furthermore, the cotton fabric-based TENG can be attached to the finger, wrist, or elbow as a reusable self-powered strain sensor for motion detection due to its shape adaptivity and durability. This work provides a useful design strategy for fabrication of wearable TENGs for energy harvesting and human motion monitoring. Graphical abstract
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BIOCONJUGATE CHEMISTRY
·
2023
·
IF 4.7
Yulin Jiang,Juehan Wang,Ruibang Wu,Lin Qi,Leizheng Huang,Jing Wang,Meixuan Du,Zheng Liu,Yubao Li,Limin Liu,Ganjun Feng,Li Zhang
Inspired by the negative Poisson’s ratio (NPR) effects of the annulus fibrosus (AF) in intervertebral discs (IVDs), we designed a re-entrant honeycomb model and then 3D printed it into a poly(ε-caprolactone) (PCL) scaffold with NPR effects, which was followed by in situ polymerization of polypyrrole (PPy), thus constructing a PPy-coated NPR-structured PCL scaffold (−vPCL-PPy) to be used as the AF implant for the treatment of lumbar herniated discs. Mechanical testing and finite element (FE) simulation indicated that the NPR composite implant could sustain axial spine loading and resist nucleus pulposus (NP) swelling while displaying uniform stress diffusion under NP swelling and contraction. More interestingly, the NPR-structured composite scaffold could also apply a reacting force to restrain NP herniation owing to the NPR effect. In addition, the in vitro biological assessment and in vivo implantation demonstrated that the NPR composite scaffold exhibited good biocompatibility and exerted the ability to restore the physiological function of the disc segments.
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PubMed
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tao Yu,Yiting Che,Hao Fu,Dingfeng Ma,Wenjia Zhao,Shitan Yan,Ting Bian,Liuting Zhang
The innovative design of highly active and noble-metal-free electrocatalysts for the oxygen reduction reaction (ORR) is urgently required for the widespread application of Zinc-air batteries (ZABs). This study presents a porous composite, Co 9 S 8 @NSC, which integrates N and S co-doped carbon aerogels with Co 9 S 8 nanoparticles to create ideal ORR electrocatalysts. The porous carbon aerogels posesess a high specific surface area, which offers abundant catalytic sites and efficient channels for the reactants and electrolytes, while maintaining a uniform distribution of nanoparticles during long-term operation. The collaboration of ORR-active Co 9 S 8 nanoparticles and N and S co-doped carbon aerogels significantly improves ORR performance. Co 9 S 8 @NSC demonstrates a competitive ORR activity, including a high half-wave potential (E 1/2 , 0.85 V), fast electron transfer kinetics (Tafel slop, 53.3 mV dec −1 ), and prominent long-term stability. When utilized as an air cathode catalyst in primary Zn-air batteries, the Co 9 S 8 @NSC electrode displays a power density of 150.9 mW cm −2 and a specific capacity of 735 mAh g zn −1 . Overall, this work presents a promising electrocatalyst design for ORR, which could greatly benefit the development of ZABs.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2023
·
IF 4.3
Shiliang Zhu,Ke Li,Shuai Qin,Jianguo Lin,Ling Qiu
Traditional photodynamic therapy (PDT) suffers from poor tissue penetration due to using external light as excitation source. Cerenkov radiation (CR) from radionuclides can serve as an internal light source to activate photosensitizers inside lesion tissues. Using CR instead of external light in PDT is thought to be an effective way to overcome the shortcoming of traditional PDT. However, the weakness of CR emission limits the outcomes of CR-induced PDT (CR-PDT). We anticipated that CR-induced combined therapy could effectively enhance the therapeutic outcome of CR-PDT. Herein, a ROS-responsive Chemo-PDT agent ( TTC ) was synthesized by conjugation of tetraphenylporphyrin (photosensitizer) with camptothecin (chemotherapeutic drug) through a ROS-cleavable thioketal linker. Under activation by CR emission from gallium-68 ( 68 Ga), the porphyrin moiety could generate ROS , which then cleaves the thioketal linker to induce the subsequent release of CPT. Using [ 68 Ga]Ga-NOTA-Nb109 as an intracellular CR emitter, in comparison with its non-cleavable analogue ( TUC ) only displaying phototoxicity, TTC exhibited much higher cytotoxicity toward A375-hPD-L1 cells due to its combined effect of PDT and chemotherapy. Our work presents a new strategy to use ROS-responsive Chemo-PDT agent to improve the outcomes of CR-PDT.
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Environmental Science-Water Research & Technology
·
2023
·Vol. 9
·期 4
·1238-1253
·
IF 5
Xinling Wang,Chunhui Zhang,Zong Liu,Bingxu Quan,Wenjing Lu,Xuezhi Li,Peidong Su,Yuanhui Tang,Yuanqing Bu,Rong Zhou
Ceramic membrane separation has been widely used in industrial wastewater treatment, but membrane contamination problems have limited its efficient and economical application. This study introduced reduced graphene oxide (rGO) and carbon nanotubes (CNTs) into the preparation of polypyrrole (PPy). Both rGO and CNTs were loaded on the surface layer of a ceramic membrane by an in situ oxidative polymerization-self-assembly method to form an rGO–CNT–PPy modified ceramic membrane, which was supplemented with an electric field effect to improve the antifouling performance. Characterization and electrochemical analysis indicated that the modified conductive ceramic composite membrane exhibited excellent electrical conductivity and stability, with an average square resistance of 78.9 Ω sq−1. The experimental results showed that TN, COD, NH3-N, Ni, Fe, and Cu were well removed under certain conditions with a removal efficiency of 63.60%, 64.00%, 68.31%, 89.90%, 95.04%, and 88.82%, respectively. Meanwhile, the pH of pickling wastewater increased from 2.61 to 6.63, and the membrane contamination was significantly improved. Furthermore, after 5 runs, the decay of membrane flux was less than 12%, and this modified conductive ceramic composite membrane was subjected to an electric field, which can effectively slow down the membrane contamination phenomenon. This approach based on the rGO–CNT–PPy modified conductive ceramic membrane provides a clean and effective technique for membrane contamination control.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 3
·1-12
·
IF 5.7
Chu Zhe,Gong Wenxue,Muhammad Yaseen,Shah Syed Jalil,Liu Qing,Xing Linguang,Zhou Xueyun,Liu Ying,Zhao Zhenxia,Zhao Zhongxing
A bimetallic polycrystalline sensor (Cr/Fe-SNCM) having nanosized and high dispersion was designed and used for the electrochemical simultaneous determination of dopamine (DA) and uric acid (UA). Catalytic nanosized Cr/Fe were highly anchored on N/S/O-contained porous carbon with high dispersion and polycrystalline Cr/Fe via energetic mechanochemical method and high-temperature carbonization. The obtained Cr/Fe-SNCM exhibited high graphitized carbon supporter and endowed high electron transport and signal output for the whole sensor. Moreover, highly dispersed Cr/Fe sites and the polycrystalline form (metal-N/S/O) efficiently enhanced the catalytic reaction, leading to a limits of detection (based on the 3σ/m criterion) of 25.8 and 22.5 nM for DA and UA, respectively. This is 1–2 orders of magnitude lower than many state-of-the-art reported sensors. The Cr/Fe-SNCM 1.0 sensor exhibited wide working range (0.1 to 10.0 μM), high recovery (96–103%) and low relative standard deviation (RSD = 3.2–4.7%) for DA and UA in real serum samples, possessing high significance for practical large-scale applications. Graphical abstract
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xin Wang,Abing Guo,Yajun Fu,Mingyang Tan,Weiping Luo,Weijun Yang
Using pyrrole and terephthalaldehyde as raw materials, porphyrin-conjugated microporous polymer (CMP) without metal centers in the porphyrin ring was synthesized directly via the one-step method. The polymer was carbonized at different temperatures to obtain a series of carbonaceous nanospheres C-CMP-x (x is the pyrolysis temperature), of which C-CMP-900 is a multifunctional electrochemical catalyst with excellent performance. Compared to the uncarbonized polymer, C-CMP-900 is more sensitive and efficient for the reduction of nitrobenzene and exhibits a lower limit of detection. There was a significant improvement in the performance of nitrobenzene reduction over nonmetallic catalysts described in the literature. Moreover, the catalyst also shows excellent oxygen evolution reaction (OER) electrocatalytic activity, with lower overpotential than commercial RuO2. Even after long cycling tests, the catalyst maintained good activity. The catalyst, with an ultralow detection limit for nitrobenzene reduction and excellent OER activity, may be attributed to its high specific surface area and special porous carbon structure based on the porphyrin skeleton.
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JOURNAL OF POROUS MATERIALS
·
2023
·Vol. 30
·期 5
·1439-1448
·
IF 2.6
He Yan,Guo Zhulei,Chen Mingfan,Wan Sicheng,Peng Nan,Fu Xiaolei,Yuan Dingzhong,Na Bing
In this paper, a new type of carbazole-based hyper-crosslinked porous polymer (HCP-CP) was prepared through a very simple “knitted” method. The obtained novel polymer HCP-CP has a good adsorption property of methyl orange (MO) and methylene blue (MB) organic dyes in aqueous solution due to its high surface area and rich nitrogen atoms. The effect of pH, adsorption time, different initial concentration of dyes and adsorption reusability were investigated in detailed. The optimum pH is 8 for the adsorption of MB and 6 for the adsorption of MO, respectively. Under the best condition, the Langmuir model fitted the adsorption isotherm well and the adsorption behavior follow pseudo-second-order kinetics. The maximum adsorption capacity of HCP-CP for cationic dye MB (q max =751.88 mg/g) is more than twice higher than that of anionic dye MO (q max =274.73 mg/g). These capacity differences may be owing to the stronger electrostatic interaction between the negatively charged nitrogen atoms of HCP-CP with the cationic dye MB than that of MO. Moreover, the used polymer HCP-CP still retain a removal percentage above 92% after 5 times adsorption-desorption recycle. Therefore, this work provided a convenient synthetic route to develop a novel hyper-crosslinked polymer with high adsorption capacity for the entrapment of dyes from aqueous solution.
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