Journal of Cleaner Production
·
2019
·
IF 6.395
Yufeng Ma,Fei Song,Yun Hu,Qinying Kong,Chengguo Liu,Md Anisur Rahman,Yonghong Zhou,Puyou Jia
Almost 80% of plasticizers used in polyvinyl chloride (PVC) materials are toxic o-phenyl plasticizers. In order to replace o-phenyl plasticizers in PVC materials, a series of highly branched and nontoxic plasticizers (CHE-4,CHE-8 and CHE-12) based on natural cashew shell oil (CNSL), an agricultural and forestry residue, were synthesized via facile one-pot solvent-free synthesis. The chemical structure, relative molecular mass and thermal stability of the obtained highly branched and nontoxic plasticizers were characterized. The toxicity of CHE-12 was investigated in the low (1000 mg/kg), middle (2000 mg/kg and 3000 mg/kg) and high dose (5000 mg/kg), the results suggested that CHE-12 has toxic doses of 5000 mg/kg and is a non-toxic plasticizer. PVC materials plasticized with CHE-12 showed more excellent thermal stability, plasticizing property and migration stability than dioctyl phthalate (DOP). Microstructure of PVC materials was investigated and the results showed that compatibility of PVC with CHE-12 is better than DOP. The microscopic plasticizing mechanism was also investigated. CHEs were proved to be promising candidates for the chemical conversion of CNSL derivatives into environmentally friendly and non-toxic plasticizers.
研究领域:
化学工程
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Qiaocan Huang,Zunxian Yang,Yuanqing Zhou,Yuliang Ye,Bingqing Ye,Zihong Shen,Wenbo Wu,Zongyi Meng,Zhiwei Zeng,Hongyi Hong,Songwei Ye,Zhiming Cheng,Qianting Lan,Jiaxiang Wang,Ye Chen,Hui Zhang,Tailiang Guo,Fushan Li,Yongyi Chen,Zhenzhen Weng
Quantum dots (QDs) with an alloy shell (CdSe@ZnS/ZnS) are one of the most promising emitters for optoelectronic devices for their superior properties such as narrow full width at half maximum (FWHM), high color purity and tunable wavelength. However, the presence of lattice stresses during the internal growth of quantum dots can cause severe exciton bursts. Optimizing the ramp-up process during the core growth of quantum dots and rising the temperature when cladding with ZnS shells is an effective strategy for obtaining high-quality quantum dots. Besides, the stability of quantum dots is further modified by using 1-Octanethiol (OT) as ligands. Detailed analyses of the morphology, colloidal stability, and luminescence performance of QDs were represented. Finally, green CdSe@ZnS/ZnS QLEDs with prolonged carrier lifetimes and less defect state densities achieved peak luminescence at 361850 cd/m 2 with a current efficiency (CE) of 33 cd/A. This work provides a better understanding of the relationship between defect state density and the performance of quantum dots for designing and fabricating high-performance light-emitting diodes.
研究领域:
材料科学
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光学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Cheng Cheng,Lingquan Hu,Raphael Kanyire Seidu,Jiangtao Xu,Shou-xiang Jiang
Conventional liquid-solid phase change materials (PCMs) are usually susceptible to leaking at high temperatures. To address the leaking of PCMs, gold (Au) shell microcapsules with a PCM core (PCM core-Au shell microcapsules) have been prepared by directly coating the impermeable Au film onto emulsions containing octadecane, eicosane or coconut oil core. Au shell with different thickness have been coated on the emulsion surface to achieve a stable microcapsule structure and high phase change enthalpy. The melting enthalpy of PCM core-Au shell microcapsules ranges from 70 to 144 J/g. No obvious leaking of liquid PCMs during the heating process is observed. By adsorbing the PCM core emulsions to pre-cationized cotton textiles and subsequently electroless plated Au film onto the emulsion surface, flexible cotton samples with PCM core-Au shell microcapsules are successfully prepared. The adsorption efficiency of emulsion to the cotton samples reaches 20 % by immersing the sample into a 0.3 vol% emulsion suspension for 2 h. The temperature distribution test shows that the PCM core-Au shell microcapsules coated samples have an obvious latent heat storage and release behaviour during the heating and cooling processes. Additionally, 63 % photo-thermal conversion efficiency has been achieved for octadecane core-Au shell microcapsules coated samples due to the Plasmonic localised heating of Au NPs. At ambient or cool environments, PCM core-Au shell microcapsules coated samples always reach a higher temperature with a faster temperature increase rate on the sample surface and the skin surface simulated by a tubing coil filled with 37℃ water.
研究领域:
材料科学
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纳米技术
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纺织工程
✓ 已验证
产品关联
DOI
高影响因子
Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-10
·
IF 20.257
Yu Peng,Cao Sheng,Shan Yuliang,Bi Yuhe,Hu Yaqi,Zeng Ruosheng,Zou Bingsuo,Wang Yunjun,Zhao Jialong
InP-based quantum dot light-emitting diodes (QLEDs), as less toxic than Cd-free and Pb-free optoelectronic devices, have become the most promising benign alternatives for the next generation lighting and display. However, the development of green-emitting InP-based QLEDs still remains a great challenge to the environmental preparation of InP quantum dots (QDs) and superior device performance. Herein, we reported the highly efficient green-emitting InP-based QLEDs regulated by the inner alloyed shell components. Based on the environmental phosphorus tris(dimethylamino)phosphine ((DMA) 3 P), we obtained highly efficient InP-based QDs with the narrowest full width at half maximum (~35 nm) and highest quantum yield (~97%) by inserting the gradient inner shell layer ZnSe x S 1−x without further post-treatment. More importantly, we concretely discussed the effect and physical mechanism of ZnSe x S 1– x layer on the performance of QDs and QLEDs through the characterization of structure, luminescence, femtosecond transient absorption, and ultraviolet photoelectron spectroscopy. We demonstrated that the insert inner alloyed shell ZnSe x S 1− x provided bifunctionality, which diminished the interface defects upon balancing the lattice mismatch and tailored the energy levels of InP-based QDs which could promote the balanced carrier injection. The resulting QLEDs applying the InP/ZnSe 0.7 S 0.3 /ZnS QDs as an emitter layer exhibited a maximum external quantum efficiency of 15.2% with the electroluminescence peak of 532 nm, which was almost the highest record of InP-based pure green-emitting QLEDs. These results demonstrated the applicability and processability of inner shell component engineering in the preparation of high-quality InP-based QLEDs.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2013
·
IF 4.387
Yaping Li,Li Qi,Ying Shen,Huimin Ma
The core@shell Fe 3 O 4 @Au nanoparticles (NPs) functionalized with exchangeable self-assembled monolayers have been developed for mode switching magnetic solid-phase extraction (MSPE) using high performance liquid chromatography with ultraviolet detection. The adsorbents were synthesized by chemical coprecipitation to prepare magnetic cores followed by sonolysis to produce gold shells. Functionalization of Fe 3 O 4 @Au NPs surface was realized through self-assembly of commercially available low molecular weight thiol-containing ligands using gold shells as intermediate platform and the dynamic nature of Au–S chemistry allowed substituent of one thiol-containing ligand with another simply by thiol exchange process. The resultant adsorbents were characterized by transmission electronic microscopy, Fourier transform infrared spectroscopy, elemental analysis, contact angle measurement, and vibrating sample magnetometry. To evaluate the versatile performance of the developed MSPE adsorbents, they were applied for normal-phase SPE followed by reversed-phase SPE. A few kinds of diphenols and polycyclic aromatic hydrocarbons (PAHs) were employed as model analytes, respectively. The predominant parameters affecting extraction efficiency were investigated and optimized. Under the optimum experimental conditions, wide dynamic linear range (6.25–1600 μg L −1 for diphenols and 1.56–100 μg L −1 for PAHs) with good linearity ( r 2 ≥ 0.989) and low detection limits (0.34–16.67 μg L −1 for diphenols and 0.26–0.52 μg L −1 for PAHs) were achieved. The advantage of the developed method is that the Fe 3 O 4 @Au NPs could be reutilized for preconcentrating diverse target analytes in different SPE modes sequentially simply through treatment with desired thiol-containing ligands.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Small
·
2015
·Vol. 11
·期 37
·4856-4863
·
IF 8.368
Chao Liang,Xuejiao Song,Qian Chen,Teng Liu,Guosheng Song,Rui Peng,Zhuang Liu
Graphical A magnetic-targeting-enhanced cancer sentinel lymph node metastasis treatment strategy is developed using gold-shelled iron oxide nanoclusters with polyethylene glycol coatings as the magnetic-responsive photothermal agent. Compared with the treatment only acting on primary tumors, this treatment strategy by ablating both primary tumors and sentinel lymph nodes can remarkably inhibit lymphatic cancer metastasis and offer greatly improved animal survival.
研究领域:
肿瘤学
·
纳米医学
·
生物材料
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 3
·733
·
IF 5
Chun Zhao,Yujun Ji,Gangqiang Tang,Xin Zhao,Dong Mei,Jie Ru,Denglin Zhu,Yanjie Wang
Ionic polymer–metal composites (IPMCs) have attracted attention in recent years due to their integration of actuation and sensing functions. As one of the main sensing functions of IPMCs, humidity sensing has been of consistent interest in wearable health monitors and artificial skin. However, there are still some technical challenges in that classical IPMCs have poor humidity sensing performance due to their dense surface electrode, and IPMCs are damaged easily due to an electrode/membrane mismatch. In this work, through the spraying and electrodepositing process, we developed an efficient method to rapidly prepare a Au-shell-Ag-NW (silver nanowire)-based IPMC with high strength, low surface resistance and excellent humidity sensing performance. Meanwhile, we optimized the preparation method by clarifying the influence of solvent type and electrodepositing time on the performance of the Au-shell-Ag-NW-based IPMC, thus effectively improving the humidity sensing effect and strength of the IPMC. Compared with previous research, the humidity electrical response (~9.6 mV) of the Au-shell-Ag-NW-based IPMC is at least two orders of magnitude higher than that of the classical IPMC (~0.41 mV), which is mainly attributed to the sparse gap structure for promoting the exchange of water molecules in the environment and Nafion membrane, a low surface resistance (~3.4 Ohm/sq) for transmitting the signal, and a seamless connection between the electrode and Nafion membrane for fully collecting the ion charges in the Nafion membrane. Additionally, the Au-shell-Ag-NW-based IPMC could effectively monitor the human breathing process, and the humidity sensing performance did not change after being exposed to the air for 4 weeks, which further indicates that the Au-shell-Ag-NW-based IPMC has good application potential due to its efficient preparation technology, high stability and good reproducibility.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 38
·22616-22621
·
IF 3.119
Liren Wang,Han Wang,Yanming Liu,Xinyu Wang,Peng Tao,Wen Shang,Benwei Fu,Chengyi Song,Tao Deng
This paper introduces an approach to synthesize bimetallic nanoparticles under an alternating temperature field in aqueous solution. During the synthesis, pyro-catalytic barium titanate is used as the substrate to reduce the metallic ions dispersed in the solution due to the generated charges at the surface of pyro-materials under temperature oscillation. Chloroauric acid and potassium tetrachloroplatinate are used as precursors to produce gold/platinum bimetallic nanoparticles through a pyro-catalytic process. Transmission electron microscopy characterization, in combination with energy dispersive X-ray spectroscopy mapping, demonstrates that the bimetallic nanoparticle is composed of an Au core and Au/Pt alloy shell structure. Compared to the conventional approaches, the pyroelectric synthesis approach demonstrated in this work requires no toxic reducing agents and waste heat can be used as a thermal energy source in the synthesis. Hence, it offers a potential “green” synthetic method for bimetallic nanoparticles.
研究领域:
材料科学
·
纳米技术
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Zhi Liang Zhao,Lian Ying Zhang,Shu Juan Bao,Chang Ming Li
Metal core–shell nanostructures have been extensively studied as one of the most promising electrocatalysts to significantly reduce the loading of the expensive Pt catalyst for fuel cells but it is very challenging to fabricate such a structure to possess proper metal components while making small and uniformly distributed nanoparticles for high catalytic performance. In this work, small and uniformly distributed Au-core/PtCu alloy–shell structured nanoparticles (Au@PtCu NPs) were fabricated by a novel one-pot facile method. The as-prepared Au@PtCu/C has a much larger electrochemical active surface area (ECSA) (64.8 m 2 g −1 Pt ) than that of AuPtCu/C(38.5 m 2 g −1 Pt ), PtCu/C (31.02 m 2 g −1 Pt ) and commercial Pt/C (25.4 m 2 g −1 Pt ) catalyst. This new catalyst not only greatly reduces Pt loading but also significantly increases the catalytic activity and stability toward methanol oxidation reaction in comparison to the commercial electrocatalyst. This is mainly attributed to a synergistic effect from the small and uniform core–shell nanostructure and the unique chemical compositions of Au and PtCu alloy, thus offering a great potential for a less expensive but highly active catalyst toward direct methanol fuel cells (DMFCs).
研究领域:
材料科学
·
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Qi Xue,Xin-Yu Bai,Yue Zhao,Ya-Nan Li,Tian-Jiao Wang,Hui-Ying Sun,Fu-Min Li,Pei Chen,Pujun Jin,Shi-Bin Yin,Yu Chen
Inefficient electrocatalysts and high-power consumption are two thorny problems for electrochemical hydrogen (H 2 ) production from acidic water electrolysis. Herein we report the one-pot precise synthesis of ultrafine Au core-PtAu alloy shell nanowires (Au@Pt x Au UFNWs). Among them, Au@Pt 0.077 Au UFNWs exhibit the best performance for formic acid oxidation reaction (FAOR) and hydrogen evolution reaction (HER), which only require applied potentials of 0.29 V and −22.6 mV to achieve a current density of 10 mA cm −2 , respectively. The corresponding formic acid electrolyzer realizes the electrochemical H 2 production at a voltage of only 0.51 V with 10 mA cm −2 current density. Density functional theory (DFT) calculations reveal that the Au-riched PtAu alloy structure can facilitates the direct oxidation pathway of FAOR and consequently elevates the FAOR activity of Au@Pt 0.077 Au UFNWs. This work provides meaningful insights into the electrochemical H 2 production from both the construction of advanced bifunctional electrocatalysts and the replacement of OER.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2023
·
IF 11.5
Qi Xue,Zixin Ge,Zihan Yuan,Jiangtao Huang,Bin He,Yu Chen
The highly active, selective and stable anode electrocatalysts for the ethanol oxidation reaction (EOR) are extremely desirable for the application of direct ethanol fuel cells (DEFCs). Herein, one-dimensional Au core@AuPt 0·20 Rh 0.08 alloy shell nanowires (Au@AuPt 0·20 Rh 0.08 CS-NWs) with long aspect ratio and cross-linked network architecture are synthesized. For the EOR, Au@AuPt 0·20 Rh 0.08 CS-NWs display higher peak current density, better resistance to CO poisoning and more lasting stability compared with Au@AuPt 0.28 CS-NWs and commercial Pt black electrocatalyst, which can be attributed to the trimetallic synergistic effect between the Au, Pt and Rh atoms. Specifically, the Rh can promote the C–C bonds and adsorb OH ads while Au can change the electronic structure of Pt, endowing Pt with a high anti-poisoning ability to CO ads and promoting the complete oxidation of various C1 intermediate to CO 2 . This work provides an effective strategy for the rational construction of high-performance Pt-based EOR electrocatalysts by optimizing composition, morphology and architecture.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 14
·1900050
·
IF 10.856
Ting Su,Zhong Lin Wang,Zhiwei Wang
It is demonstrated that the redox reaction behaviors of Pd nanoparticles in HAuCl 4 solutions can be substantially modified by the introduction of hexadecyl trimethyl ammonium bromide (CTAB) agents through systematic liquid cell transmission electron microscopy (LCTEM) investigations. The gradual dissolution of Pd nanoparticles is observed when HAuCl 4 solution is pumped into liquid flow cells, the etching characteristics of which are depended on both HAuCl 4 concentrations and incident electron doses. In comparison, with the presence of CTAB agents, the dominated phenomenon appears to be the precipitation of Au species and incorporation onto the surface of Pd seeds. It is also observed that the rapid growth of Au on Pd seeds occurs by loading Pd and HAuCl 4 solutions into static liquid cells. The resultant Au shells exhibit rather sparse structural configurations and are formed possibly by homogeneous nucleation/coalescence of Au species as well as monomer attachments. The observed Au-shell growth instead of Pd dissolution is attributed to the presence of the residual regents, which may be also responsible for the initially already existing small Au adsorptions at the corner/edge sites of Pd seeds. The study provides a useful reference for the convenient fabrication of complex nanostructures and functional nanomaterials in a controllable way.
研究领域:
纳米技术
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）