Materials
·
2024
·Vol. 17
·期 10
·2173
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IF 3.1
Jiazhen He,Hang Li,Chengqi Liu,Xiaoqian Wang,Qi Zhang,Jinfeng Liu,Mingwei Wang,Yong Liu
Metal halide perovskite semiconductors have emerged as promising materials for various optoelectronic applications due to their unique crystal structure and outstanding properties. Among different forms, perovskite nanowires (NWs) offer distinct advantages, including a high aspect ratio, superior crystallinity, excellent light absorption, and carrier transport properties, as well as unique anisotropic luminescence properties. Understanding the formation mechanism and structure–property relationship of perovskite NWs is crucial for exploring their potential in optoelectronic devices. In this study, we successfully synthesized all-inorganic halide perovskite NWs with high aspect ratios and an orthorhombic crystal phase using the hot-injection method with controlled reaction conditions and surface ligands. These NWs exhibit excellent optical and electrical properties. Moreover, precise control over the halogen composition through a simple anion exchange process enables the tuning of the bandgap, leading to fluorescence emission, covering a wide range of colors across the visible spectrum. Consequently, these perovskite NWs hold great potential for efficient energy conversion and catalytic applications in photoelectrocatalysis.
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Materials Today Communications
·
2024
·
IF 3.7
Yun Tang,Miao Wang,Yuchao Zhang,Yalou Xin,Xiaohu Ren,Hudie Yuan
Perovskite quantum dots (PQDs) hold immense potential for application in backlight liquid crystal display (LCD) owing to their narrow emission spectra , tunable luminous wavelength along with high photoluminescence quantum yield. However, their poor stability severely impedes the practical application of PQDs in optoelectronic devices . Here, we prepare KSF@PQDs composites by in-situ generation of green-emitting MAPbBr 3 PQDs on the surface of treated KSF:Mn red phosphors. The surface treatments on KSF:Mn are employed for realization of in-situ passivation and anchoring of MAPbBr 3 through chemical interaction between the NH 2 group on KSF:Mn and Pb 2+ on PQDs, which enables high luminescence intensity, narrow spectral width and simultaneously high photostability of PQDs. Moreover, the ratio of green-to-red emission intensity in KSF@PQDs can be easily modulated by changing APTES content during the surface treatment of KSF:Mn. Further, white light-emitting diode devices consisting of InGaN chip and KSF@PQDs composite achieve luminous efficiency of 41.6 lm·W −1 , as well as wide color gamut of 116.6 % for National Television Systems Council standard and 87.2 % for Rec.2020 standard, which paves the way for the application of high stability PQDs in wide color gamut LCD.
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Polymers
·
2024
·Vol. 16
·期 8
·1167
·
IF 4.7
Jipeng Chen,Xiaoxiao Zheng,Rongkun Jian,Weibin Bai,Guocai Zheng,Zhipeng Xie,Qi Lin,Fengcai Lin,Yanlian Xu
Marine anti-fouling coatings represent an efficient approach to prevent and control the marine biofouling. However, a significant amount of antifouling agent is added to improve the static antifouling performance of the coatings, which leads to an issue whereby static antifouling performance conflicts with eco-friendly traits. Herein, this work reports an in situ reduction synthesis of silver nanoparticles (AgNPs) within polymers to produce composite coatings, aiming to solve the aforementioned issue. Firstly, urushiol-based benzoxazine monomers were synthesized by the Mannich reaction, using an eco-friendly natural product urushiol andn-octylamine and paraformaldehyde as the reactants. Additionally, AgNPs were obtained through the employment of free radicals formed by phenolic hydroxyl groups in the urushiol-based benzoxazine monomers, achieved by the in situ reduction of silver nitrate in benzoxazine. Then, the urushiol-based benzoxazine/AgNPs composite coatings were prepared by the thermosetting method. AgNPs exhibit broad-spectrum and highly efficient antimicrobial properties, with a low risk to human health and a minimal environmental impact. The composite coating containing a small amount of AgNPs (≤1 wt%) exhibits effective inhibition against various types of bacteria and marine microalgae in static immersion, thereby displaying outstanding antifouling properties. This organic polymer and inorganic nanoparticle composite marine antifouling coating, with its simple preparation method and eco-friendliness, presents an effective solution to the conflict between static antifouling effectiveness and environmental sustainability in marine antifouling coatings.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Yun Tang,Miao Wang,Yalou Xin,Xiaohu Ren,Hudie Yuan,Nan Yan
Perovskite quantum dots (PQDs) and K2SiF6:Mn4+ (KSF) phosphor, renowned for high color purity, are prime candidates for emitters in white light-emitting diodes (WLEDs) for wide color gamut displays. To enhance the luminous efficacy (LE) and working stability of PQDs and KSF-integrated WLEDs, intricate fabrication processes, involving multiple post-treatments of PQDs and their blending with KSF, are often necessitated, inevitably compromising the production efficiency of the device. Herein, we develop a facile in situ synthesis approach that not only effectively passivates surface defects in PQDs and enhances their stability but also simplifies the fabrication process of PQDs and KSF-integrated WLEDs. Specifically, the silica-coated PQDs/KSF (PQDs/KSF@SiO2) composite is synthesized via the in situ growth of MAPbBr3 on an ethanol-treated KSF surface followed by SiO2 encapsulation. The Pb–F coordination and SiO2 encapsulation enable high luminescence intensity and simultaneously enhanced photothermal stability of PQDs. Eventually, the WLED based on PQDs/KSF@SiO2 achieves a high LE of 83.11 lm·W–1 alongside a wide color gamut of 122.6% NTSC standard. Remarkably, the device exhibits excellent working stability, preserving its high LE virtually unaltered after 4 h of continuous operation. This work provides a facile approach to yield WLEDs with superior LE, wide color gamut, and exceptional working stability, positioning them ideally for practical display applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Liyi Tang,Yangsen Xu,Shuang Tang,Yu-Xiang Yu,Aiyun Meng,Xinzhong Wang,Wei-De Zhang
Photocatalytic hydrogen production utilizing solar energy provides a pivotal strategy for realizing a carbon–neutral society. Cocatalyst-modified semiconductor materials have emerged as promising candidates for photocatalytic applications due to their ability to facilitate the spatial separation and directional migration of photogenerated electron-hole pairs. Nevertheless, those systems often face challenges such as intricate preparation procedures and issues with non-compact recombination. Herein, we report a one-pot thermal treatment approach for synthesizing a composite of Mn 3 O 4 nanoparticles and sodium poly(heptazine imides) (Na-PHI). Mn 3 O 4 nanoparticles were in situ generated and embedded within the Na-PHI matrix during the sintering process. The resulted photocatalyst demonstrated significantly enhanced photoinduced charge separation efficiency, exhibiting approximately 6-fold and 3-fold improvements compared to pristine Mn 3 O 4 and Na-PHI, respectively. The photocatalytic hydrogen evolution rate reached 14 μmol h −1 , nearly 14 times that of Na-PHI (1.2 μmol h −1 ) in the aqueous solution of benzylamine (BA) under visible light illumination (780 nm ≥ λ ≥ 420 nm). Furthermore, the optimized Mn 3 O 4 -Na-PHI sample (Mn-Na-PHI) displayed a remarkably high photocatalytic hydrogen generation rate alongside the synchronous photo-oxidative coupling of aliphatic and aromatic amine under visible light. This work underscores the potential for rational design and synthesis of novel Na-PHI-based functional composites for sustainable energy applications.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiaofei Ma,Wenyi Wu,Qin Wang,Jinqiu Xu,Liangliang Cai
This study integrated a chiral selector with micelle pseudostationary phase to develop a novel chiral separation method in capillary electrophoresis. A new type of nanomicelles materials was prepared via amidation reaction using the carboxymethyl-β-cyclodextrin (CM-β-CD) as the hydrophilic group and long chain fatty amines as the hydrophobic group. This novel amide compound self-assembled into nanomicelles in a buffer solution, acting as both a chiral selector and pseudostationary phase. The separations of model drugs were notably improved when compared to the single CM-β-CD system and CM-β-CD/sodium dodecyl sulfate micellar electrokinetic capillary chromatograph system. This study optimized several separation parameters and comprehensively characterized the nanomicelles through several methods such as infrared spectroscopy, nuclear magnetic resonance spectroscopy, particle size determination, and transmission electron microscopy (TEM). Additionally, amlodipine was chosen as the model analyte to determine drug loading in both the single CM-β-CD system and the nanomicelles system using high performance liquid chromatography. The findings indicated that nanomicelles exhibited superior drug loading capacity. The particle size and TEM analysis visually confirmed the distribution of enantiomers in the hydrophobic core of nanomicelles. The proposed nanomicelles showed promise in chiral separation and this strategy opened up new pathways for the development of functional chiral materials.
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Applied Materials Today
·
2025
·
IF 6.9
Yasi Zhang,Shuling Xiang,Bin Cheng,Kun Li,Weiping Xie,Hongliang Zhang
The ever-growing development from electrochromic devices has increased the interest of Prussian blue (PB) materials as counter electrodes. Herein, we report an innovative method for synthesizing Prussian blue precursor ink composed of sub-100 nm PB nanoparticles uniformly dispersed in ethanol. The resulting nanocrystal-in-glass PB thin films with nanoporous structure fabricated by blade coating technique exhibit an impressive optical modulation of 82.48 % at 700 nm and a high coloration efficiency of 178.59 cm 2 C −1 . The significantly enhanced electrochromic performance is primarily attributed to the short diffusion path, abundant active sites and buffering effect in the amorphous matrix, which can facilitate the rapid transport of ions and reduce electrode volume change. Furthermore, such nanocrystal-in-glass PB thin films can improve the long-term stability of quasi-solid-state complementary PB-WO 3 electrochromic devices, cycling more than 10,000 cycles. This work offers a novel approach to produce nanocrystal-in-glass PB thin films used as counter electrode in electrochromic devices with extraordinary durability.
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CHEMOSPHERE
·
2014
·
IF 3.499
Jie Mei,Li-Yun Yang,Lu Lai,Zi-Qiang Xu,Can Wang,Jie Zhao,Jian-Cheng Jin,Feng-Lei Jiang,Yi Liu
The interactions between quantum dots (QDs) and biological systems have attracted increasing attention due to concerns on possible toxicity of the nanoscale materials. The biological effects of CdSe QDs and CdSe/ZnS QDs with nearly identical hydrodynamic size on Saccharomyces cerevisiae were investigated via microcalorimetric, spectroscopic and microscopic methods, demonstrating a toxic order CdSe > CdSe/ZnS QDs. CdSe QDs damaged yeast cell wall and reduced the mitochondrial membrane potential. Noteworthy, adhesion of QDs to the yeast cell surface renders this work a good example of interaction site at cell surface, and the epitaxial coating of ZnS could greatly reduce the toxicity of Cd-containing QDs. These results will contribute to the safety evaluation of quantum dots, and provide valuable information for design of nanomaterials.
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Frontiers in Chemistry
·
2020
·
IF 3.693
Qiu Ping,Wang Qiuhe,Zhao Yizhou,Dai Yi,Dong Yuanyuan,Chen Changli,Chen Qi,Li Yujing
The halide perovskite (PVSK) material, an excellent light absorber with fast carrier kinetics, has received increased attention as a potential photocatalyst for organic synthesis. Herein, we report a straightforward synthesis of chemically modified halide perovskite and its application as an efficient photocatalyst to convert styrene into benzaldehyde. A simple method is employed to synthesize the chemically modified CsPbBr3/Cs4PbBr6 nanosheets by using ZrCl4 to simultaneously achieve the Cl doping and the surface modification with Zr species. The photocatalytic oxidation rate of styrene to benzaldehyde catalyzed by surface-modified CsPbBr3/Cs4PbBr6 nanosheets under visible light can reach 1,098 μmol g−1 h−1, 2.9 times higher than that of pristine CsPbBr3/Cs4PbBr6 nanosheets (372 μmol g−1 h−1). The enhanced photocatalytic performance may originate from the modified band structure induced by the synergistic effect of Cl doping and surface modification, whereby the same methodology can be applied to MAPbBr3. This work demonstrates the surface modification of PVSK materials and their potential as efficient photocatalyst toward organic synthesis.
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EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Zhiyong Wang,Baotao Huang,Xinchao Li,Yi Pan,Zhaohui Zheng,Jinni Deng
Because of low surface energy, silicone polymers would easily peel off from polypropylene (PP) substrate as hydrophobic coatings and they are incompatible with PP in melt-blending process as well. Therefore, ethylene polymers modified with both silicone and alkane side-groups were prepared by nucleophilic substitution in this work. It was confirmed that these prepared polymers could migrate and aggregate to the surface of the blends at that melting temperature when blended with PP due to the low surface energy and high entropy of silicone side groups. Meanwhile, chain entanglement was achieved between alky side-groups of silicone polymers and polymer chain of PP by melt-blending process, so that the compatibility of the blends was improved and the bonding force of two polymers increased simultaneously. Accordingly, molding blends with stable and durable hydrophobility were successfully gained based on migration of silicone and entanglement of alkane and PP. It’s noticeable that the water contact angle of the blend remained to be about 106° from 113°, even soaking in acid (pH = 1) and alkali (pH = 14) solutions, deionized water and anhydrous ethanol, or under multiple strong frictions. This will provide a facile and effective strategy to endow general materials with durable antifouling properties directly by injection molding without additional coating.
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POLYMER INTERNATIONAL
·
2024
·
IF 2.9
Xiran Shen,Tiantian Wei,Di Liu,Kang Yang,Yangang Jiang,Jianwei Lu,Li Guo
Amphiphilic block copolymers are characterized by the presence of distinct hydrophilic and hydrophobic regions, which are usually arranged in alternating blocks. This unique structure allows these copolymers to self-assemble into well-defined nanostructures that exhibit remarkable resistance to enzymatic hydrolysis, high biocompatibility and the ability to be customized with specific structures. These properties make them highly desirable in various applications. Self-assembled amphiphilic polypeptoids are currently under development as a promising class of pharmaceutical agents. However, the utilization of these peptides as drug carriers for efficient delivery presents a number of challenges. These challenges include less-than-optimal loading efficacy and restricted biocompatibility. Herein, a series of stable amphiphilic block copolypeptoids (PNEG-b-PNBG and PNEG-b-PNHG) were designed and synthesized by controlled ring-opening polymerization. PNEG chain segments provide hydrophilicity, while PNBG and PNHG chain segments provide hydrophobicity. The hydrophobic molecular chains aggregate in aqueous solutions, resulting in the formation of nano-assemblies. The self-assembled amphiphilic block polypeptoid copolymers were investigated. The morphologies of copolymers take the form of micelles from tens of nanometers to a few hundred nanometers. The properties of amphiphilic block copolypeptoids used as drug carriers were further investigated by conducting drug release and cytotoxicity tests. The results indicate that the cumulative release efficiency of self-assembled polypeptoid copolymers can reach up to about 91%. And they have good biocompatibility and can be expected to be safe materials for efficient drug delivery. This work could provide a facile method for the preparation of amphiphilic block peptoid copolymers for biopharmaceutical applications. © 2024 Society of Industrial Chemistry.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Dongdong Liang,Zhiheng Xu,Dandan Yang,Zhibin Xu,Weitong Yin,Xiaobin Tang
Luminescence instability in service environments has limited the widespread use of halide perovskite materials, especially for X-ray energy conversion and detection/imaging. This work proposed a method for improving luminescence stability through polymer encapsulation, which is more convenient than compositional engineering and surface modulation. Meanwhile, the differences in the luminescence intensities of composite films synthesized by encapsulation of different polymer matrices and their luminescence stability under various harsh X-ray irradiation conditions were systematically investigated. The applications of the developed CsPbBr3-embedded polymer films with excellent luminescence performance and high service stability in X-ray radiation energy utilization and detection/imaging were discussed. The results show that CsPbBr3-embedded PS films can meet the spectral modulation requirements of radioluminescent materials for nuclear batteries and can also fulfill the needs of flexible X-ray imaging with a high spatial resolution.
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