Nature Sustainability
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2024
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IF 25.7
Kong Xiangdong,Ni Jie,Song Zhimin,Yang Zhengwu,Zheng Jiana,Xu Zifan,Qin Lang,Li Hongliang,Geng Zhigang,Zeng Jie
Hydroxylamine is an important nitrogenous feedstock for the chemical industry. Conventional hydroxylamine synthesis methods utilize ammonia as the nitrogen source and require harsh reaction conditions, leading to unfavourable environmental footprint. Here we develop a plasma-electrochemical cascade pathway (PECP) powered by electricity for sustainable hydroxylamine synthesis directly from ambient air and water at mild conditions. In the first step, the plasma treatment of ambient air and water delivers a nitric acid solution with a concentration of up to 120.1 mM. Subsequently, the obtained nitric acid is selectively electroreduced to hydroxylamine using a bismuth-based catalyst. The faradaic efficiency for hydroxylamine reached 81.0% at −1.0 V versus reversible hydrogen electrode. As a result, this PECP method achieves a high hydroxylamine yield rate of 713.1 μmol cm −2 h −1 with a selectivity of 95.8%. Notably, both steps of the PECP method are operated at room temperature. Overall, our work provides a viable approach for efficient hydroxylamine synthesis from simpler feedstock at milder conditions, contributing to the sustainability transformation of the chemical industry.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
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2020
·Vol. 31
·期 22
·225602
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IF 3.551
Changsong Chen,Dan Li,Yihua Wu,Cheng Chen,Zhi-Gang Zhu,Wan Y Shih,Wei-Heng Shih
Perovskite nanocrystals are a new type of fluorescent material with the advantages of facile preparation process, bright tunable color with high quantum yield. They are ideal candidates for optoelectronic devices such as light-emitting diode (LED) and display. However, for practical applications of iodine-based perovskite nanocrystals, the photostability remains a great challenge because of their sensitivity to environmental factors such as oxygen, humidity etc. In this paper, we improve the photostability of CsPbI3 by introducing the polymethyl methacrylate (PMMA) as a matrix to form flexible perovskite/PMMA composite films. The composite films maintain good photoluminescence quantum yield for 25 d in air and 4 d in water. Furthermore, these films are flexible and can sustain multiple bending and folding while maintaining their photoluminescence properties. This photostability against mechanical deformation allows for the development of flexible devices. As an example, flexible white light-emitting diodes (WLED) were produced with chromaticity coordination (0.31, 0.32), color temperature 6735 K and good stability over time.
研究领域:
材料科学
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光电技术
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纳米技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2017
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IF 7.504
Jiping Wang,Yangyi Chen,Jie An,Ke Xu,Tao Chen,Peter Müller-Buschbaum,Qi Zhong
Comfort regulation and inhibition of bacterial adhesion to textiles is realized by cross-linking thermoresponsive random copolymer to the cotton fabrics. By introduction of ethylene glycol methacrylate (EGMA) monomers into n-isopropylacrylamide (NIPAM) with a molar ratio of 2:18, the obtained random copolymer poly(n-isopropylacrylamide-co-ethylene glycol methacrylate), abbreviated as P(NIPAM-co-EGMA), presents a transition temperature (TT) of 40 °C in an aqueous solution with a concentration of 1 mg/mL. Because of the additional EGMA in the copolymer, the obtained P(NIPAM-co-EGMA) shows a glass transition temperature (Tg) of 0 °C, which is much lower than that of pure PNIPAM (Tg = 140 °C). Therefore, the introduction of P(NIPAM-co-EGMA) into the cotton fabrics will have little influence on the softness of the fabrics. Due to the cross-linked P(NIPAM-co-EGMA) layer on the cotton fabrics, the porosity of the polymer layer can be adjusted by varying the external temperature below or above TT, showing that regulation of the air and moisture permeability as well as the body comfort are feasible in the cotton fabrics cross-linked with P(NIPAM-co-EGMA). In addition, the cross-linked P(NIPAM-co-EGMA) layer is capable of absorbing moisture in the ambient atmosphere to form a hydrated layer on top, which can inhibit bacterial adhesion to the textiles.
研究领域:
材料科学
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纺织工程
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生物医学工程
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DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
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2017
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IF 9.466
Yuetao Zhao,Liping Tong,Zhibin Li,Na Yang,Haidi Fu,Lie Wu,Haodong Cui,Wenhua Zhou,Jiahong Wang,Huaiyu Wang,Paul K. Chu,Xue-Feng Yu
Nanomedicines intergrating both therapy and diagnosis functions provide a promising strategy for anticancer treatment. As novel two-dimensional materials, black phosphorus nanosheets (BPs) possess unique properties for biomedical applications, pratically for photothermal therapy (PTT) of cancer, but their lack of air and water stability may hinder their application. Herein, a covalent functionalization strategy based on Nile Blue (NB) dye via diazonium chemistry is established to modify BPs, not only enhancing the stability of BPs but also rendering BPs via near-infrared (NIR) fluorescence, forming a novel multifunctional nanomedicine with both PTT and NIR imaging capabilities. In vitro tests demonstrate that the dye-modified BPs (named NB@BPs) have good biocompatibility and exhibit strong PTT and NIR imaging efficiency. In vivo experiments show that the NB@BPs can mark the tumor site with red fluorescence and lead to efficient tumor ablation under NIR irradiation. These results reveal a potential BP-based nanomedicine with multiple functionalities that bode well for anticancer applications.
研究领域:
纳米技术
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癌症治疗
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生物医学工程
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材料科学
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成像技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）