ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Ying Ge,Zhiqiang Chen,Kaiqin Ou,Junming Kang,Zhimin Zhai,Man Zhang,Lequan Wang,Hongbin Lu
Poly (p-phenylene benzobisoxazole) (PBO) nanofiber films are promising candidates for next-generation electronics due to their superior thermal stability, mechanical strength, and heat dissipation capability. However, fabricating high-quality PBO nanofiber film remains challenging due to its inherent poor solubility and infusibility. Current sol–gel methods for fabricating PBO nanofiber films suffer from the tedious operation, environmental risk, and potential structural defects, thereby limiting their performance and applications. A hierarchical assembly strategy is demonstrated to optimize the fabrication and aggregation structure of PBO nanofiber films through proton-acceptor solvents such as H 2 O. By controlling nanofiber aggregation and enhancing molecular alignment via external force-assisted crystallization, high-performance PBO nanofiber films are achieved with exceptional properties: great in-plane thermal conductivity (25.85 W·m −1 ·K −1 ), outstanding tensile strength (189.98 MPa), and remarkable thermal stability (T 5% ≈ 517 °C). Remarkably, assembling PBO nanofibers (PBONFs) in high concentration into PBO wet films takes just a few minutes, drastically enhancing preparation efficiency. When applied as flexible printed circuit board substrates, PBO nanofiber films effectively homogenize temperature fields, suppressing local hotspots and reducing surface temperatures by 16.7 °C. This strategy offers a scalable solution for manufacturing high-performance PBO nanofiber films, demonstrating significant potential for advanced thermal management in next-generation electronics.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Sikai Zhang,Rui Yin,Zhilong Tan,Minghai Zhao,Peng Zhou,Pei He,Runjing Zhang,Ziyan Wang,ZhiFeng Huang,Hai Hu,Li Liu
The mixed phosphate Na₄Fe₃(PO₄)₂(P₂O₇) (NFPP) via synergistic coordination of mixed [PO₄]/[P₂O₇] anion groups achieves a flat voltage plateau at 3.2 V (vs. Na + /Na) and a theoretical specific capacity of 129 mAh g −1 , but its practical application is still limited by its inherent low electronic conductivity. Through structural integration of polyanion-type cathode materials, this study innovatively designed and constructed hierarchical Na₄Fe₃(PO₄)₂(P₂O₇)@C mesoporous microspheres (NFPP@CMMS). The NFPP nanocrystals uniformly embedded in a three-dimensional interconnected meso porous carbon matrix (pore size distribution: 2–5 nm). Such hierarchical meso/micro-nano architectures provided expansive ion-exchange interfaces, accelerating Na + de/intercalation kinetics while enhancing electronic conductivity and mitigating structural collapse during cycling. Consequently, the NFPP@CMMS delivers exceptional reversible discharge capacity (121 mAh g −1 at 0.1C), outstanding rate capability (72 mAh g −1 at 50C), and superior cycling stability (90.70 % capacity retention after 3500 cycles at 5C). This triple-synergy strategy—combining nano-confinement effects, interconnected mesoporous channels, and carbon-encapsulated network—provides a novel pathway for developing practical sodium-ion battery cathodes.
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Wanjie Tan,Congming Tang,Xinli Li,Zhi Chen
The advancement of PMS (peroxymonosulfate)-activating platforms with high activity and wide adaptability carries substantial significance in wastewater remediation. Employing dual-phase modification via phosphorization and H₂-Ar etching, we fabricate multi-component active centers (sulfides/phosphides) to achieve enhanced activity and extended degradation capability toward diverse pollutants. To evaluate practical applicability, key process parameters, including catalyst dosage, PMS concentration, and TC (tetracycline) concentration, were optimized. Concurrently, the effects of common interfering ions, pH variations, and different water matrices (river water and seawater) on TC degradation were investigated. Results demonstrate that the catalytic system achieves 100 % TC removal at 20 mg L −1 TC and 94.5 % removal at 30 mg L −1 TC. The system maintained high degradation efficiency with minimal impact from interfering ions and diverse water sources, demonstrating robust environmental adaptability. Additionally, it exhibits efficient degradation performance across a wide range of contaminant species. ESR (electron spin resonance spectroscopy) analysis coupled with quenching experiments verified that ·OH, SO₄· − , and 1 O₂ mediate organic pollutant degradation, wherein singlet oxygen ( 1 O₂) plays a dominant role.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 34
·27043-27051
·
IF 3.84
Weiqian Pan,Guangshan Zhang,Tong Zheng,Peng Wang
CuO/Al2O3 was synthesized successfully by the impregnation-deposition method and used as a heterogeneous catalyst in a microwave assisted Fenton-like process (MW/FL). The morphology and physico-chemical properties of the CuO/Al2O3 catalyst were characterized using field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and Brunauer–Emmett–Teller (BET) analysis. The degradation of p-nitrophenol (PNP) was investigated by different processes, including microwave irradiation (MW) alone, hydrogen peroxide (H2O2) oxidation under microwave irradiation without the catalyst (MW/H2O2), a Fenton-like (FL) process, a MW/FL process and a thermally-assisted Fenton-like (TH/FL) process. The results showed that the CuO/Al2O3 catalyzed MW/FL could generate more hydroxyl radicals (˙OH) and remove PNP more effectively compared to other processes. The effects of initial pH, dosage of H2O2 and catalyst, microwave power and radiation time, and PNP concentration on the removal efficiency were also studied. The results showed that 93% removal efficiency of PNP was obtained within 6 min under optimized conditions. Moreover, the catalyst had a good stability and reusability, thus expanding the scope of non-iron based catalysts in the Fenton-like reactions.
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高影响因子
Current Analytical Chemistry
·
2015
·Vol. 11
·期 3
·211-216
·
IF 1.132
Xiaojing Si,Ting Wang,Yaping Ding,Bingdi Liu,Liqiang Luo
In this study, multi-walled carbon nanotubes (MWCNTs) and vitamin B12 (VB12) were fabricated on the surface of glassy carbon electrode (GCE). This modified electrode (MWCNTs/VB12/GCE) was designed to determine p-hydroxyacetophenone (p-HYD) by square wave voltammetry. The MWCNTs/VB12 film was characterized by Electrochemical impedance spectroscopy and Fourier transform infrared spectroscopy, which exhibited excellent electrocatalytic activity toward p-HYD by using square wave voltammetry. The peak current was linear with the concentration of p-HYD over the range of 0.5 - 250 µM with the detection limit of 0. 15 µM (S/N = 3). Furthermore, this proposed sensor has also demonstrated good reproducibility, high stability and excellent anti-interference ability.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2018
·Vol. 77
·期 5
·1441-1448
·
IF 1.247
Li Yuejin,Shang Xili,Li Changhai,Huang Xiaoming,Zheng Jingjing
Novel visible-light-induced UiO-66/BiOI photocatalysts with a p–n junction structure have been prepared for the first time through a facile hydrothermal method. The prepared photocatalysts were characterized using the powder X-ray diffraction, high resolution transmission electron microscopy, scanning electron microscopy, UV–visible diffuse reflectance spectra, and N 2 adsorption–desorption (Brunauer–Emmett–Teller) techniques respectively. The photodegradation performances of UiO-66/BiOI photocatalysts were evaluated by photodegrading salicylic acid under visible-light irradiation. The UiO-66/BiOI composites displayed much higher photocatalytic efficiencies than pure BiOI under visible light. When the content of UiO-66 was 5.2 wt%, the composite (UiO-66/BiOI-2) has the best photocatalytic activity. Most of the salicylic acid molecules can be degraded in 100 min. The degradation rate of UiO-66/BiOI-2 samples is higher than single BiOI and UiO-66. The enhanced photocatalytic performance of UiO-66/BiOI may be ascribed to the formation of p–n heterojunctions between BiOI and UiO-66, which facilitates the transfer and separation of the photogenerated charge carriers. After recycling of the photocatalyst for five times for the photodegradation of salicylic acid, more than 85% of salicylic acid could still be degraded in the fifth cycle, implying that the as-prepared photocatalysts are highly stable.
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高影响因子
Nanoscale Research Letters
·
2015
·Vol. 10
·期 1
·1-7
·
IF 2.779
Ye Jian,Li Xueliang,Zhao Jianjun,Mei Xuelan,Li Qian
Two-dimensional (2D) material has many advantages including high carrier mobilities and conductivity, high optical transparency, excellent mechanical flexibility, and chemical stability, which made 2D material an ideal material for various optoelectronic devices. Here, we developed a facile method of preparing MoS 2 nanosheets followed by a facile liquid exfoliation method via ethyl cellulose-assisted doping and utilizing a plasma-induced p-doping approach to generate t effectively the partially oxided MoS 2 (p-MoS 2 ) nanosheets from the pristine n-type nanosheets. Moreover, an n-p junction type MoS 2 photodetector device with the built-in potentials to separate the photogenerated charges is able to significantly improved visible light response. We have fabricated photodetector devices consisting of a vertically stacked indium tin oxide (ITO)/pristine n-type MoS 2 nanosheets/p-MoS 2 /Ag structure, which exhibit reasonably good performance illumination, as well as high current values in the range of visible wavelength from 350 to 600 nm. We believe that this work provides important scientific insights for photoelectric response properties of emerging atomically layered 2D materials for photovoltaic and other optoelectronic applications.
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高影响因子
Nanoscale Research Letters
·
2015
·Vol. 10
·期 1
·1-7
·
IF 2.779
Wu Shufen,Yan Songjing,Qi Wei,Huang Renliang,Cui Jing,Su Rongxin,He Zhimin
We demonstrated a facile and environmental-friendly approach to form gold nanoparticles through the reduction of HAuCl 4 by aspartame. The single-crystalline structure was illustrated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The energy-dispersive X-ray spectroscopy (EDS) and Fourier transform infrared (FTIR) results indicated that aspartame played a pivotal role in the reduction and stabilization of the gold crystals. The crystals were stabilized through the successive hydrogen-bonding network constructed between the water and aspartame molecules. Additionally, gold nanoparticles synthesized through aspartame were shown to have good catalytic activity for the reduction of p -nitrophenol to p -aminophenol in the presence of NaBH 4 .
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高影响因子
CATALYSIS LETTERS
·
2024
·Vol. 154
·期 11
·6157-6167
·
IF 2.3
Yang Cuina,Wu Jun
The separation of photo-generated carriers in heterojunctions plays a crucial role in regulating the built-in electric field. The design of materials with directional migration characteristics inside the bulk phase and at the interface between the two phases is of great significance for studying photocatalytic hydrogen evolution. The P-CdS/Ag 2 S composite photocatalytic system prepared in this study was doped with P element by heating CdS and NaH 2 PO 2 in a muffle furnace, resulting in the directed migration of photo-generated charges in the prepared sample driven by an internal electric field. By in-situ deposition of Ag 2 S on the surface of P-CdS, a Janus heterojunction was prepared to enhance the transfer of charge carriers at the phase interface. The hydrogen evolution rate of P-CdS/Ag 2 S is 12.44 mmol·h −1 ·g −1 , which is 30 times higher than that of the previously prepared pure CdS sample (0.411 mmol·h −1 ·g −1 ). This significant improvement in photocatalytic performance is attributed to the doping of P element and the in-situ loading of Ag 2 S co-catalyst, which together promote the effective separation and transport of photogenerated charge carriers, thereby enhancing the photocatalytic activity of the material. This work is of great significance for exploring the charge-directed transfer problem of sulfide photocatalysts in the field of photocatalytic hydrogen evolution. Graphical
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ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 15
·1808415
·
IF 15.621
Fengren Cao,Wei Tian,Linxing Meng,Meng Wang,Liang Li
Flexible and self-powered perovskite photodetectors attract widespread research interests due to their potential applications in portable and wearable optoelectronic devices. However, the reported devices mainly adopt an independent layered structure with complex fabrication processes and high carrier recombination. Herein, an integrated ferroelectric poly(vinylidene-fluoride-trifluoroethylene) (P(VDF-TrFE)) and perovskite bulk heterojunction film photodetector on the polyethylene naphthalate substrate is demonstrated. Under the optimum treatment conditions (the polarization voltage and time, and the concentration of P(VDF-TrFE)), the photodetector exhibits a largely enhanced performance compared to the pristine perovskite device. The resulting device exhibits ultrahigh performance with a large detectivity (1.4 × 10 13 Jones) and fast response time (92/193 µs) at the wavelength of 650 nm. The improved performance is attributed to the fact that the polarized P(VDF-TrFE)/perovskite hybrid film provides a stronger built-in electric field to facilitate the separation and transportation of photogenerated carriers. These findings provide a new route to design self-powered photodetectors from the aspect of device structure and carrier transport.
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高影响因子
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
·
2020
·
IF 1.27
Yixiao Li,Jing Li,Jinfeng Du,Changfan Zhang,Xiaoyan Wang,Qingpei Xiang,Chuanfei Zhang
The thermoelectric materials working in radioisotope thermoelectric generators or space reactor power system will be exposed to neutron irradiation in space missions . Herein, the influences of neutron irradiation with doses of 10 13 n/cm 2 and 10 15 n/cm 2 on the transport properties of p- and n-type Half-Heusler thermoelectric alloys were investigated. It was found that, neutron irradiation showed negative effects on thermoelectric properties of p-type Hf 0.5 Zr 0.5 CoSb 0.85 Sn 0.15 and p-type Hf 0.5 Ti 0.5 CoSb 0.85 Sn 0.15 . But neutron irradiation had no effects on thermoelectric properties of n-type Hf 0.5 Zr 0.5 NiSn 0.985 Sb 0.015 and n-type ZrNiSn 0.985 Sb 0.015 . After 10 15 n/cm 2 neutron irradiation, the electrical conductivity , power factor and ZT of p-type Half-Heusler alloys decreased by 7–22%, which was caused by the decreased carrier concentration. However, the radiation-induced changes in the thermoelectric properties proved to be essentially healed by annealing at 773 K ~ 873 K. The anti-annealing effects were also studied.
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高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 42
·13314-13320
·
IF 0
Sen Liu,Bo Yu,Tong Zhang
In this work, reduced graphene oxide–poly(p-phenylenediamine) (rGO–PpPD) hybrids have been successfully prepared through a facile and effective method by heat treatment of GO aqueous dispersion in the presence of pPD at 80 °C for 2 h. The combined characterization by scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) indicates the successful production of rGO–PpPD hybrids with a crumpled morphology. The formation of rGO–PpPD hybrids is attributed to the redox reactions between GO and pPD, where the reduction of GO to rGO and polymerization of pPD into PpPD occurred simultaneously. It was found that rGO–PpPD hybrids show good catalytic activity toward oxidation of dopamine (DA), and no response to ascorbic acid (AA) and uric acid (UA), leading to a high-performance DA sensor. The linear detection ranges are estimated to be from 5 μM to 25 μM (r = 0.998) and 50 μM to 200 μM (r = 0.995), respectively. The detection limit is estimated to be 0.36 μM at a signal-to-noise ratio of 3.
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