Nanomaterials
·
2024
·Vol. 14
·期 24
·2041
·
IF 4.4
Yi Zhang,Huilong Chen,Junfeng Qu,Jiayu Zhang,Gavin Conibeer
The hot carrier multi-junction solar cell (HCMJC) is an advanced-concept solar cell with a theoretical efficiency greater than 65%. It combines the advantages of hot carrier solar cells and multi-junction solar cells with higher power conversion efficiency (PCE). The thermalization coefficient (Qth) has been shown to slow down by an order of magnitude in low-dimensional structures, which will significantly improve PCE. However, there have been no studies calculating theQthof MAPbBr3quantum dots so far. In this work, theQthvalues of MAPbBr3quantum dots and after BABr addition were calculated based on power-dependent steady-state photoluminescence (PD-SSPL). Their peak positions in PD-SSPL increased from 2.37 to 2.71 eV after adding BABr. The fitting shows that, after adding BABr, theQthdecreased from 2.64 ± 0.29 mW·K−1·cm−2to 2.36 ± 0.25 mW·K−1·cm−2, indicating a lower relaxation rate. This is because BABr passivates surface defects, slowing down the carrier thermalization process. This work lays the foundation for the theoretical framework combining perovskite materials, which suggests that the appropriate passivation of BABr has the potential to further reduceQthand make MAPbBr3QDs with BABr modified more suitable as the top absorption layer of HCMJCs.
研究领域:
材料科学
·
光电子学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Wei-Guang Yang,Ji Liu,Zhuo Luo,Bai-Xue Li,Changjun Li,Zhong-Zhen Yu,Dongzhi Yang
Although solar-driven water evaporation is promising for mitigating water scarcity in the areas lacking clean water and far away from power grids and water grids, the low solar energy utilization, high water vaporization enthalpy, and salt deposition seriously impede its practical application for continuous, efficient, and stable desalination of seawater. Herein, siphoning and Hofmeister effects-enhanced hanging inverted cone-shaped solar-thermal evaporator with a top-down water supply is designed for efficient solar-thermal desalination of seawater, which is prepared by in situ polymerization of pyrrole on nonwoven cellulose fabrics and subsequent coating with poly(vinyl alcohol) (PVA) hydrogel. The 3D hanging inverted cone structure significantly enlarges the areas for solar-thermal energy conversion and water evaporation, while the top-down water supply via the pressure of the siphoning effect ensures sufficient water, achieving a high water evaporation rate of 3.90 kg m–2 h–1 with the water vaporization enthalpy of 2.06 kJ g–1 during solar-thermal evaporation of pure water under 1-sun irradiation. In an aqueous solution with 3.5 wt % NaCl, the PVA hydrogel generates additional intermediate water via the Hofmeister effect to further reduce the water vaporization enthalpy to 1.61 kJ g–1, thereby increasing the water evaporation rate to 4.89 kg m–2 h–1. Thanks to the significantly enlarged evaporation surface area, the reduced water vaporization enthalpy, and the sufficient top-down water supply, the hanging inverted cone-shaped evaporator with the top-down water supply is highly efficient in continuous desalination of natural seawater, achieving a water evaporation rate of 4.64 kg m–2 h–1 with a salt rejection of 99.99%.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 56
·44828-44834
·
IF 3.84
Yaohui Xu,Ruixing Li
A combined bottom-up and top-down route was developed for the template-free synthesis of mesoporous CeO2 powders using Ce(NO3)3·6H2O, NH4HCO3, H2O2, and H2O as starting reagents. The flake-like Ce2(CO3)3·8H2O precursor was etched by H2O2, and CeO2 nucleated in situ with built-in equiaxed particles. Pores formed on the flakes owing to the loss of by-products of H2O and CO2. The formation of the mesostructured CeO2 could also be explained by the large change in volume induced as a result of the difference in density between Ce2(CO3)3·8H2O and CeO2. Accordingly, the original flake-like morphology of Ce2(CO3)3·8H2O was not preserved upon pore formation and during continuous stirring in the synthesis. A subsequent hydrothermal treatment destroyed the loose aggregates of CeO2 derived from the reaction between H2O2 and Ce2(CO3)3·8H2O. Rearrangement of the CeO2 particles via a dissolution–recrystallization process occurred under certain temperatures and pressures. Consequently, CeO2 particles with coarser sizes, smoother surfaces, and mesoporous structures were obtained. The specific surface area of the particles was 166.5 m2 g−1 after hydrothermal treatment at 200 °C for 24 h. The mesoporous CeO2 particles possessed better adsorption capacities of acid orange 7 dye than basic orange 2 dye in the absence of pH pre-adjustments. The saturated adsorption amount of acid orange 7 dye was 510.2 mg g−1 at 298 K based on Langmuir linear fitting of the experimental data.
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Qiuxia Han,Xinyi Jia,Yanmeng Xu,Fei Wang,Qiang Zhang,Yong Chen
Higher biocidability of fluorinated quaternary ammonium salt (QAS) is usually contributed to its preferential segregation to the surface to better contact with and kill bacteria. However, whether its structure also elicits better performance is still unclear. Herein, the same amount of a fluorinated QAS and its nonfluorinated counterpart are both immobilized on the top surface to eliminate the effect of concentration distribution to only study their structure–biocidability relationship. Briefly, the fluorinated and nonfluorinated QASs were synthesized by quaternization of N,N-dimethylethanolamine with 2-(perfluorooctyl)ethyl bromide that was prepared by bromination of 2-(perfluorooctyl)ethanol and 1-bromodecane, respectively. Polystyrene (PS) and diblock copolymer poly(styrene)-b-poly(tert-butyl acrylate) (PS-PtBA) were successively spin coated on SiO2 wafers at different concentrations to form bilayer structures that have a PS base layer and a PtBA top layer. The tert-butyl acrylate groups of the PtBA layer of 0.9 nm were converted to carboxylic acid groups with trifluoroacetic acid for respective esterification with the two hydroxy-containing QASs. It was observed that the fluorinated and nonfluorinated surfaces fabricated at the maximum comparable esterification yield of 63.5% fully eradicated ∼104 CFU of Staphylococcus aureus and Escherichia coli in 120 and 150 min, respectively, indicating that the fluorocarbon chain is more biocidal through better interpenetration into bacterial membranes. Immobilization of a functionality on top surface provides a universal strategy to study its structural contribution to activity without interference of the concentration distribution.
研究领域:
材料科学
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化学工程
·
生物材料
·
微生物学
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DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Tao Zhang,Tao Jiang,Zhihong Liu
In continuation with our previous work, in the present study, the tertiary amine-trioctyl phosphate-sulfonated kerosene system was employed to recover Ge(IV) from the synthetic leachate of secondary zinc oxide. The effects of different complexing agents (tartaric acid, citric acid, oxalic acid, gallic acid, and salicylic acid) and impurities (Zn(II), Fe(III), Cd(II), Si(IV), and As(III)) on the extraction of Ge(IV) were investigated. Under comparable conditions, the extraction of Ge(IV) with the aforementioned complexants had the following order in terms of extraction efficiency: tartaric acid > citric acid > gallic acid > oxalic acid, or salicylic acid. The reason for the low extraction efficiency of Ge(IV) with the addition of oxalic acid was revealed by an extraction comparison using pure germanium and polymetallic solutions. Furthermore, a stoichiometry analysis of the extracted complex indicated that the extracted Ge(IV)-organic species was R 3 NH·Ge(OH) 4 (HT)·0.5TOP with the addition of tartaric acid. The concentration of Ge(IV) in the loaded organic phase was less than 1 mg/L when three-stage countercurrent stripping was adopted at an O/A ratio of 1/3 and 25 °C for 10.5 min.
研究领域:
冶金学
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化学工程
·
环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Min Lu,Jie Guo,Siqi Sun,Po Lu,Xiaoyu Zhang,Zhifeng Shi,William W. Yu,Yu Zhang
All-inorganic CsPbX 3 (X = Cl, Br, I) quantum dots (QDs) are promising materials for light-emitting diodes (LEDs), but the long insulating ligands such as oleic acid (OA) and oleylamine (OLA) on the QD surface limit the device performances. They reduce the electrical conductivity of QDs, while their loss deteriorates the photoluminescence and stability. To overcome these issues, octylphosphonic acid (OPA) with a shorter carbon chain was added in the synthesis of perovskite QDs to partially replace OA ligands. Owing to the strong interaction between OPA and Pb atoms, the undercoordinated Pb atoms on the surface of CsPbI 3 QDs can be effectively passivated by OPA, leading to improved fluorescence quantum efficiency (close to unity) and solution stability. Furthermore, the electrical conductivity of QD films was also enhanced from 5.3 × 10 −4 to 1.1 × 10 −3 S/m by using shorter chain OPA ligands. Finally, highly efficient red perovskite QD LEDs with peak external quantum efficiency (EQE) of 12.6% and maximum luminance of 10171 cd m −2 were achieved in a top-emitting device structure, a nearly 3-fold enhancement in luminance compared with pristine CsPbI 3 QDs based LEDs.
研究领域:
材料科学
·
光电技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xiaoyan Wang,Shuangqing Sun,Meng Cheng,Lan Chen,Zhenyu Wang,Jingjie Dai
The triiodide reduction reaction (IRR) of dye-sensitized solar cells (DSSCs) and hydrogen evolution reaction (HER) of overall water splitting both face slow charge transfer, leading to lower efficiency. Herein, a multifunctional NiS 2 /Ni 9 S 8 nanocube electrocatalyst, exhibiting efficient power conversion efficiency and improved H∗ adsorption and desorption performance, is designed through sulfur ion exchange and fluorine ion etching NiCo prussian blue analog precursor. As a result, NiS 2 /Ni 9 S 8 with a matchable interface as counter electrode (CE), exhibits highly improved DSSC performance in I 3 − electrolyte, achieving a power conversion efficiency (PCE) of 9.31 %. This is mainly attributed to heterostructured interface of NiS 2 /Ni 9 S 8 , which modulates the electrons transfer from the Ni atom to I 3 − ions, activating the Ni-I bond and accelerating IRR. Additionally, NiS 2 /Ni 9 S 8 enhances HER performance in both acidic and alkaline electrolytes. Specifically, NiS 2 /Ni 9 S 8 nanocube shows low overpotentials of 117 mV and 111 mV at the current density of 10 mA cm −2 in 1 M KOH and 0.5 M H 2 SO 4 , respectively. This research develops noble-metal-free bifunctional electrocatalysts for clean and renewable energy conversion systems.
研究领域:
材料科学
·
能源转换技术
·
化学工程
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产品关联
DOI
高影响因子
Nanoscale
·
2025
·Vol. 17
·期 8
·4783-4795
·
IF 5.1
Hao Yang,Yi Zhuang,Yulin Jiang,Huilun Xu,Zheng Liu,Yubao Li,Shuyu Zhang,Tao Guo,Lin Qi,Li Zhang
Continuous microenvironment modulation is an ongoing challenge in wound dressing, which includes excessive exudate absorption, oxygen delivery, bacterial inhibition and angiogenesis. Herein, we developed an in situ construction strategy to fabricate a self-retaining double-layered wound dressing, where the top layer precursor was composed of Ca2+-containing polyvinyl butyral (PVB) solution dispersed with hydroxypropyl methylcellulose (HPMC) particles, and the bottom one consisted of sodium alginate (Alg) solution blended with Ag-doped mesoporous bioactive glass powders (Ag-MBG). When in use, both precursors were simultaneously squeezed out from the twin nozzles connected to the individual chambers of a twin-chambered syringe, whereby Ca2+ in the top layer rapidly migrated downwards to crosslink Alg in the bottom layer, leading to the formation of an Alg/Ag-MBG (AA) functional hydrogel for filling an irregular wound. Meanwhile, with the rapid evaporation of low-boiling solvents, the top layer changed into a PVB/HPMC (PH) membrane covering the AA hydrogel and adhering to the surrounding healthy skin to fix the dressing. Practically, HPMC particles in the top layer acting as “micropumps” could drain the wound exudate out, while Ag-MBG in the bottom layer endowed the dressing with anti-bacterial, hemostatic, and pro-healing functions. The integrally constructed PH-AA dressing achieved over 99% bacterial elimination against both E. coli and S. aureus. Biological assessments indicated that the double-layered dressing possessed excellent biocompatibility and enhanced wound healing, demonstrating a wound closure rate of >97% at day 15. This study provides a facile method to directly construct multi-layer dressings on wounds to meet various wound care requirements.
研究领域:
生物材料学
·
组织工程
·
医学
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产品关联
DOI
PubMed
高影响因子
AGRICULTURAL WATER MANAGEMENT
·
2023
·
IF 6.7
Lingyun Chen,Ziyi Hu,Wenhui Chen,Ziwei Xu,Can Hao,Prakash Lakshmanan,Dunyi Liu,Xinping Chen
The high loss of foliar-applied fertilizers in the wet season and other extreme weather conditions reduces fertilizer use efficiency remarkably low. Emerging nano-iron materials, owing to their highly desirable properties such as exceptionally small size, particle surface and interface attributes, strong adhesion and high iron ratio, could overcome the limitations of traditional fertilizers. However, their anti-leaching property, leaching resistance mechanism, iron nutrition enrichment capacity and cost effectiveness remain unclear. In this study, four nano-iron materials (Fe nanoparticles (Fe-NPs), Fe 3 O 4 -NPs, α-Fe 2 O 3 -NPs and γ-Fe 2 O 3 -NPs) were compared with traditional iron fertilizers (FeSO 4 and Fe-EDTA). The results showed that the efficiency of traditional iron fertilizers decreased greatly under simulated rainfall conditions due to their poor leaching resistance. In contrast, nano-iron fertilizers performed exceptionally well under simulated rainfall conditions with significant increase in leaf iron concentration, photosynthesis and growth of peanut. This was mainly attributed to their decreased contact angle, increased wetting capacity and increased adhesion on plant surface, which collectively decreased fertilizer leaching remarkably. The adhesion capacity of Fe 3 O 4 -NPs (53.5 mN/m), was nearly three times that of traditional iron fertilizer (18.3 mN/m). Therefore, only a small amount of Fe 3 O 4 -NPs (4 mg/plant) was needed relative to traditional iron fertilizers (FeSO 4 , 59 mg/plant) to achieve comparable high leaf Fe concentration (1076.96 μg/g) under rainfall conditions. Cost evaluation suggests that the cost-competitiveness of Fe 3 O 4 -NPs will become comparable to that of FeSO 4 when its price comes down from the current cost of $139/kg to $36/kg, the cost of FeSO 4 , which is likely considering the pace of nano-material technology development. Together, these results demonstrate the remarkable potential of nano-iron fertilizers in mitigating the escalating fertilizer cost and improving the environmental outcomes of peanut, as well as potentially other crops grown in wet season.
研究领域:
农业科学
·
植物营养学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Horizons
·
2024
·
IF 12.2
Fengming Hu,Qian Zhou,Ruolin Liu,Yanfei Zhu,Yuanzhe Liang,Dan Fang,Bing Ji,Zhiming Chen,Jianyi Luo,Bingpu Zhou
Electronic skin (E-skin) has attracted considerable attention for simulating the human sensory system for use in prosthetics, human–machine interactions, and healthcare monitoring. However, it is still challenging to fully mimic the skin function that can de-couple stimuli such as normal/tangential forces, contact/non-contact behaviors, and react to high-frequency inputs. Herein, we propose fully bionic E-skin (FBE-skin), which consists of a magnetized micro-cilia array (MMCA), a micro-dome array (MDA), and flexible electrodes to completely duplicate the hairy layer, epidermis/dermis interface, and subcutaneous mechanoreceptors of human skin. The optimized MDA and interdigital electrode enable the FBE-skin to perceive static forces with a linear sensitivity of 96.6 kPa−1 up to 100 kPa, while the branch of electromagnetic induction allows the FBE-skin to sensitively capture dynamic stimuli with vibrating signals up to 100 Hz. The top-down integration of MDA and MMCA not only replicates the three-dimensional structure of human skin, but also synergistically provides the FBE-skin with bionic rapidly adapting (RA) and slowly adapting (SA) receptors. Consequently, the FBE-skin is capable of perceiving dynamic/static, normal/tangential, and contact/non-contact stimuli with a broad range of working pressures and frequencies. We expect that the design of FBE-skin will be promising for widespread applications from intelligent sensing to human–machine interactions.
研究领域:
生物医学工程
·
材料科学
·
传感器技术
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DOI
PubMed
高影响因子
Frontiers in Pharmacology
·
2025
·
IF 4.8
Xiang-Yu Liu,Yu-Shou Wu,Yi-Rui Qu,Hui Zhou,Tian Liu,Xiao-Wei Su,Fang-Chao Hu,Jin-Guang Zheng,Shao-Fang Han,Jia-Ke Chai,Yun-Fei Chi
Background/objectives: Burns can cause severe physiological disturbances. Oral rehydration therapy (ORT) is an alternative to intravenous fluids. However, the World Health Organization-recommended oral rehydration solution (WHO-ORS) lacks specific components to address the critical physiological changes in patients with burns. This study aimed to identify and evaluate several drugs that enhance the ORT efficacy in burn shock management.Methods: A systematic search of PubMed, Web of Science, and Scopus (2000.01.01–2024.06.30) yielded 1,500 relevant studies, from which 270 were selected for bibliometric analysis. Drug candidates (≥3 mentions) were prioritized via the Bibliometric Evidence Score (BES) integrating publication frequency, journal impact factor (5-year average), impact score, and Q1 journal distribution. Subsequently, the translational potential of these candidates was assessed using an Integrated Translational Score incorporating weighted dimensions: Mechanistic Clinical Alignment Score (weight = 0.45), Emergency Deployment Feasibility (weight = 0.20), and BES (weight = 0.35). The top 10 drugs by the BES were selected for experimental validation, which were tested in a rat model with 50% total body surface area full-thickness burns (n = 286, 22/group), comparing sham controls, untreated controls, WHO-ORS, and drug-adjuvanted ORS groups. Primary outcomes included 48 h survival rate and blood lactate (Lac), hematocrit (HCT), malondialdehyde (MDA), and interleukin-6 (IL-6) levels.Results: Teprenone or vitamin C in combination with the WHO-ORS significantly improved survival outcomes following severe burns. They reduced blood lactate, HCT, MDA, and IL-6 levels. Glutamine and ethyl pyruvate showed beneficial effects but did not significantly improve survival. Hypertonic Saline and Dobutamine failed to demonstrate efficacy.Conclusion: This study demonstrated that adding teprenone or vitamin C to the WHO-recommended ORS can enhance the therapeutic efficacy of ORT in managing burn shock. These findings provide a scientific basis for further clinical trials and development of optimized ORS for patients with burns.
研究领域:
烧伤医学
·
药理学
·
急诊医学
·
营养学
·
重症监护
·
生物医学研究
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DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2018
·Vol. 20
·期 27
·18455-18462
·
IF 3.906
Xiangyang Duan,Chao Ma,Wentao Jin,Xiaoman Ma,Lu’an Guo,Su-Huai Wei,Jinying Yu,Yelong Wu
A simple and efficient top-down strategy, the chemical vapor etching method, is reported for synthesizing corrugated ZnO nano/micro rods (NRs). The stabilization mechanism of this unique nanostructure has been determined through a combination of aberration-corrected field emission scanning electron microscopy, high-resolution transmission electron microscopy, and first-principles calculations. The experimental data are in good agreement with the theoretical calculations, and a remarkable nonpolar-to-polar surface faceting transition is demonstrated. The corrugated-shaped structure results from the remarkable stability of the defect-induced reconstructions (O vacancy, Zn–Zn dimer), which makes the high-index polar {301} and {10} planes lower in energy compared to the nonpolar {100} plane. Based on the results of first-principles surface calculations, a general formula is established to provide an accurate description of the unusual size effect of the length of the corrugated unit vs. the NR diameter, and it also offers direct explanations for certain experimental observations. The present study deepens our atomic-level understanding of the detailed structure and stability of polar surface decorated corrugated ZnO NRs, and points to a viable path towards designing polar-stable wurtzite structures.
研究领域:
材料科学
·
纳米科技
·
表面科学
·
凝聚态物理
·
计算材料学
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DOI
高影响因子
危险品化学品经营许可证（带存储）