Science Advances
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2020
·Vol. 6
·期 21
·
IF 13.117
R. Tian,S.-M. Xu,Q. Xu,C. Lu
To achieve efficient polymer-based room-temperature phosphorescence (RTP) materials, covalently embedding phosphors into the polymer matrix appeared as the most appealing approach. However, it is still highly challenging to fabricate RTP materials on a large scale because of the inefficient binding engineering and time-consuming covalent reactions. Here, we have proposed a scalable preparation approach for RTP materials by the facile B─O click reaction between boronic acid–modified phosphors and polyhydroxy polymer matrix. The ab initio molecular dynamics simulations demonstrated that the phosphors were effectively immobilized, resulting in the suppressed nonradiative transitions and activated RTP emission. In comparison to the reported covalent binding time of several hours, such a B─O click reaction can be accomplished within 20 s under ambient environment. The developed strategy simplified the construction of polymer-based RTP polymeric materials by the introduction of facile click chemistry. Our success provides inspirations and possibilities for the scale-up production of RTP materials.
研究领域:
材料科学
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高分子化学
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点击化学
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光学材料
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磷光
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Zhichao Yang,Weiquan Cai,Jinpeng Zhou,Qing Xia,Tielin Wang
A fast, large-scale, and stable preparation method was successfully developed to obtain η-Al2O3 microspheres with particle sizes of 3–10 μm from cheap and widely sourced NaAlO2 solution using N,N-dimethylformamide (DMF) as a morphological modifier and a precipitant simultaneously at room temperature. The yield of alumina increases from 33.3 to 77.3% by increasing the dose of DMF from 100 to 400 mL. The utilization efficiency of DMF significantly increased by adding fresh NaAlO2 into the reused filtrate after separating the bayerite precipitate (precursor of η-Al2O3). Importantly, the η-Al2O3 microspheres obtained from the filtrate-reuse experiments show the stable phase structures, morphologies, and pore structure properties. Furthermore, the typical η-Al2O3 microspheres supported Pd catalyst presents a higher catalytic activity of 10.6 g/L for the hydrogenation of anthraquinone than that of the commercial γ-Al2O3-supported Pd catalyst (8.5 g/L), suggesting that the as-prepared η-Al2O3 microspheres have good application prospects for catalytic hydrogenation and related fields.
研究领域:
材料科学
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催化
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
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2022
·
IF 4.132
Yaodong Li,Shirui Weng,Rui Niu,Weili Zhen,Feng Xu,Wenka Zhu,Changjin Zhang
We report a highly efficient and easily transferable poly(vinyl alcohol) (PVA)-assisted exfoliation method, which allows one to obtain van der Waals materials on large scales, e.g., centimeter-scale graphite flakes and hundred-micrometer-scale several layers of ZnIn2S4 and BN. The present exfoliation scheme is nondestructive, and the materials prepared by PVA-assisted exfoliation can be directly fabricated into devices. This exfoliation approach could be helpful in overcoming the preparation bottleneck for large-scale applications of two-dimensional (2D) materials.
研究领域:
材料科学
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纳米科技
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表面科学
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凝聚态物理
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化学合成
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
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2021
·
IF 3.605
Bei Liu,Peng Huang,Zhiyong Xie,Qizhong Huang
Aiming at preparing a cheap and high-performance anode material, a novel carbon-coated silicon nanowire on a surface of graphite microsphere composites was fabricated by employing a new silicon precursor via the chemical vapor deposition method. The chemical vapor deposition method could further reduce the cost and realize the large-scale preparation of silicon/graphite composites and simultaneously enhance the bonding strength between silicon and graphite. Due to the lower cost and lower requirement on equipment compared with silane, chloromethylsilane was selected to produce pure silicon as the content of carrier gas is 25 vol %. Deposited with silicon and carbon for 15 and 30 min, respectively, the carbon/silicon nanowire/graphite microsphere composites display outstanding electrochemical performance with a specific capacity of 580 mA h g–1 at a current density of 0.2 C after 100 cycles and high-rate performance of 300 mA h g–1 at 5 C. Besides, the adsorption and deposition mechanisms of silicon on a graphite surface are expounded. This new preparation process is an alternative route for promoting the practical application of silicon/graphite composites.
研究领域:
材料科学
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电化学
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能源存储
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纳米技术
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化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2013
·
IF 3.473
Ning Pan,Debin Guan,Yuntao Yang,Zhenling Huang,Ruibing Wang,Yongdong Jin,Chuanqin Xia
We report a rapid, environmentally-friendly and cost-effective route for the preparation of a graphene-based nanomaterial, carboxyl graphene (aka. reduced graphene oxide , RGO) from graphene oxide (GO). Carboxyl graphene was prepared on the scale of several grams through the reduction of GO by thiourea dioxide (TUD) at a relatively low temperature (40 °C) in an alkaline medium (pH = 10). The reduction of GO was confirmed by FT-IR, UV–vis, X-ray photoelectron, and Raman spectroscopy. In addition, this reduction was also confirmed by thermal gravimetric analysis, X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM). Characterizations of these materials demonstrated that selective reduction of the epoxy and carbonyl groups occurred on the surface of GO, while carboxyl groups were left behind. In addition, the conjugation of the carbons in the structure was restored through this reduction and a single-layer of carboxyl graphene (with a thickness of 0.80 nm, as observed by AFM) was obtained under these conditions. Carboxyl graphene had a high surface area (of 454.52 m 2 g −1 ) and contained approximately 6.9 ± 1.6 mmol of carboxyl groups per gram of material, as determined via Boehm titration. The mechanism for selective reduction of the epoxy and carbonyl groups on GO to form carboxyl graphene by TUD is proposed and discussed in detail.
研究领域:
纳米材料化学
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材料科学
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表面化学
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碳基纳米材料
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功能化纳米材料
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
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2022
·
IF 6.888
Mengyan Cao,Xiujian Zhao,Xiao Gong
In this work, we report large-scale preparation of stable Sb3+ and Bi3+ codoped Cs2ZrCl6 microcrystals for highly efficient white light emission using ionic liquids, demonstrating a broad dual-band white emission covering 400–800 nm. The dual emissions originate from the associated self-trapped excitons of the [SbCl6]3– and [BiCl6]3– octahedra. Moreover, the ratio of the dual-emission peaks can be effectively regulated by tuning the excitation wavelength. Meanwhile, to improve the optical properties and stability, ionic liquids are employed to assist the synthesis process of perovskite materials. The white light emission of one of the samples demonstrates CIE coordinates right in the center of the white light region (0.334, 0.331) and an excellent color rendering index (∼90.3), accompanied by a 66.1% quantum efficiency. Moreover, our method allows the facile synthesis of large batches of microcrystalline powders. Our findings demonstrate the potential of white phosphors as single components for future applications in lighting fields.
研究领域:
材料科学
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光电子学
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固态照明
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无机化学
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纳米技术
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Yuedan Wang,Mengjie Li,Yun Lin,Anqi Li,Changhui Li,Mufang Li,Wenwen Wang,Qiongzhen Liu,Dong Wang
In this paper, a high-performance photochromic system with rapid fading was constructed by adjusting the pH of tungstate, introducing dopants, reducing agents and polydimethylsiloxane (PDMS) coatings. In addition, the chromaticity of photochromic materials can be precisely controlled by changing the doping and reducing agent content. Continuous large-scale fabrication of novel photochromic fiber/fabric using dip coating and wet spinning has been proposed. The photochromic fibers/fabric exhibit significant color contrast (ΔE = 40.2), rapid color switching (5 s), fast fading time (10 min), good cycling stability (20 times), as well as long color-retention (7 days) under UV/visible light irradiation. Photochromic fibers after packaging with PDMS have excellent water resistance and maintain good photochromic properties even after washing (20 cycles) when exposed to water, ethanol, and detergent solutions. The photochromic fibers can be used as wristbands or embroidered on various textiles as wearable UV indicators. With the increase of UV dose, it has real-time and sensitive color rendering, which provides early warning for high dose UV radiation. The color-changing mechanism of photochromic fabric has been studied. In addition, photochromic solution has fast UV response and fading ability, which can realize the application of rewritable ink, color-changing film. Notably, its preparation process has the advantages of low cost, environmental friendliness and large-scale production, providing a new solution for smart sensing and anti-counterfeiting application.
研究领域:
材料科学
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纺织工程
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功能高分子材料
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智能传感
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光化学
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纳米复合材料
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环境响应材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Peihang Li,Zhixin Hu,Shiyu Xu,Xiaofeng Wu,Xiaoman Zhou,Yaoyu Pan,Xueqin Chen,Bingbing Jiang
Porous organic polymers (POP) are a promising material with high surface area and excellent photocatalytic performance but are obviously limited by high-cost monomers, low production and yield, harsh reaction conditions, and ruleless morphology. Inspired by the traditional polymerization process, mass-synthesizing spherical POP at normal pressure may have a change to solve the above dilemmas. Therefore, we presented a one-step strategy for mass-producing spherical POP, whose morphology was stabilized by the emulsifier at simple magnetic stirring. The as-prepared spherical POP exhibited good photocatalytic performance and porosity, both of which were significantly enhanced after the incorporation of non-noble metals (Fe, Ni, and Zn). Notably, as the solid content increased, the mass-produced spherical POP materials demonstrated a mass yield exceeding 60 wt %. The Zn-doped POP possessed the best photocatalytic performance, which could degrade 98.7% of 10 ppm of methylene blue within 40 min (higher than the degradation of 97% of the same concentration of methylene blue in 80 min by POP). In addition, the POP photocatalysts can still maintain >90% of the photocatalytic degradation rate after five cycles of degradation, showing excellent stability. This mass production strategy of POP exhibits strong advantages of low costs and industrial production potential, and a thought for preparing materials at the industrial level holds promise for various environmental application scenarios especially in the scene needing cost control.
研究领域:
材料科学
·
环境科学
·
高分子化学
·
催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yun Li,Longyin Wan,Jialiang Geng,Zunyuan Wang,Guoxin Wang,Xiaolan Qiao,Ding Yuan,Zhihui Zhao,Weichao Chen
Biomass-based poly (trimethylene 2,5-furandicarboxylate) (PTF) was synthesized by the simple and low-cost direct esterification method. The high number-average molecular weight (M n ) of about 39.6 kDa was achieved for PTF with a polydispersity index (PDI) of 2.0, which was suitable for spinning. The electrospun PTF nanofiber membranes were fabricated firstly and displayed adjustable diameters, excellent mechanical properties (lifting 550 g weight, foldability) and large-scale preparation potential (area of 100 cm × 50 cm). More impressively, high initial surface potential (13.5 kV) was found for the electrospun in-suit electret membranes, which facilitated the capture of ultrafine PM particles. Subsequently, the PTF membrane showed exceptional particle capture capability with a filtration performance of 99.96 %, low pressure drops of 78 Pa, and a satisfactory quality factor of 0.1 Pa −1 . PTF filters also demonstrated long-term service capability for purifying high PM 2.5 concentration smoke (15 cycles, 55 min), and could be flexibly introduced into various practical scenarios. Additionally, based on the selective oil/water wettability of PTF membranes, which showed outstanding separation effects of oily wastewater(＞99.88 %, 15 cycles). Therefore, the development and application of the PTF nanofibers provided a sustainable alternative for separation/purification and various fields in the future.
研究领域:
材料科学
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环境科学
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纳米技术
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可持续化学
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废物管理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）