Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 33
·8519-8525
·
IF 4.696
Baozhong Lv,Zhen Wu,Chendong Ji,Wantai Yang,Dongpeng Yan,Meizhen Yin
Systems that exhibit light-driven fluorescence change have received much attention due to their applications in luminescent switches or as sensors. However, such solid-state systems are still limited relative to those in solution form, and how to obtain photochromic fluorescent film materials for use in device fabrication is a long-standing problem. In this work, one-dimensional (1D) solid-state microcrystals combining a host molecule cyclodextrin (CD) and UV-responsive guest molecule spiropyran (SP) have been developed, which present a light-driven fluorescence change based on the isomerization of the SP molecule in the CD matrix. Firstly, the supramolecular forces including inherent hydrogen bonding and hydrophobic interactions in this self-assembled system were studied using electrospray ionization mass spectrometry (ESI-MS), isothermal titration calorimetry (ITC), and Fourier transform infrared spectra (FTIR). The scanning electron microscopy (SEM) comparison between the SP@CD system and the pristine CD or SP confirms that the SP guest plays a crucial role in the formation of 1D microcrystals. Then, through a spin-casting process, a thin film of SP@CD microcrystals was further fabricated, which shows a reversible photochromic fluorescence between fluorescence-free and high red-emission states. Moreover, the open-ring form of SP@CD microcrystals also presents two-photon emission and polarized fluorescence. Therefore, this work has offered a facile way to obtain a reversible photochromic fluorescent film, which may be applied in dynamic light-controlled fluorescent sensors and two-photon imaging.
研究领域:
材料科学
·
光化学
·
超分子化学
·
荧光传感器
·
光学功能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 17
·9116-9122
·
IF 7.443
Kun Cao,Jin Cui,Hua Zhang,Hao Li,Jinkui Song,Yan Shen,Yibing Cheng,Mingkui Wang
Efficient mesoscopic CH3NH3PbI2Br perovskite solar cells have been prepared based on the TiO2/Al2O3/carbon architecture. An appreciable power conversion efficiency of 11.03% was achieved under AM 1.5G illumination. This system combines the superior stability of MAPbI2Br and no requirement of a hole conductor layer.
研究领域:
光伏技术
·
材料科学
·
可再生能源
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 35
·e202303743
·
IF 1.9
Yifeng Liu,Yanheng Xu,Ruxian Zhou,Haichao Wei,Wuri Zhang,Huasheng Zhan,Shulong Ma,Chen Yang,Zhaohui Huang
In the process of the development of the ceramic industry, a large amount of ceramic solid waste is generated, and how to make high-value reuse of ceramic solid waste has also become a problem of common concern. In this article, a new method of making porous thermal insulation materials reusing waste electric porcelain was successfully developed. In this work, a porous light refractory with bulk density of 0.99 g/cm 3 and apparent porosity of 59% was prepared by the novel method. Which room temperature flexural and compressive strengths are 11.52 MPa and 1.84 MPa, respectively. These properties makes the waste electric porcelain-based porous light refractory can be applicated as lightweight heat insulation materials for high-temperature kilns, high-temperature catalyst carriers, high-temperature phase-change heat storage support materials, etc., which will create higher application value and research significance. Graphical In this article, a new method of making porous thermal insulation refractory reusing waste electric porcelain was successfully developed. by this method, we prepared a sample with favorable bulk density of 0.81 g/cm 3 and apparent porosity of 61 %, and the room temperature flexural and compressive strengths are 11.52 Mpa and 1.84 Mpa.
研究领域:
材料科学
·
陶瓷工程
·
废弃物资源化利用
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 46
·期 4
·5315-5322
·
IF 3.45
Jinming Shi,Yue Chang,Yuanshun Tang,Xuanbo Wang,Xuefei Wang,Xiaochen Zhang,Jiangli Cao
A novel hydrogenated LaFeO 3 was fabricated and firstly used as photocatalyst in the application of visible-light photocatalytic decomposition of organic contaminant. Through the adjusting of annealing atmosphere and temperature, a series of treated LaFeO 3 with oxygen vacancies were obtained. Compared with untreated LaFeO 3 and argon treated LaFeO 3 , hydrogenated LaFeO 3 photocatalysts exhibited higher catalytic ability. This notably improved catalytic ability was mainly assigned to the formation of disordered layer on the surface of hydrogenated LaFeO 3 . The surface oxygen vacancies of LaFeO 3 caused by hydrogenation were beneficial to light absorption and separation of photogenerated carriers . In this system, we found the amount of surface oxygen vacancies had a direct impact on the catalyst ability of hydrogenated LaFeO 3 photocatalysts. In addition, the magnetic hydrogenated LaFeO 3 photocatalysts were stable, and reused after five times without obvious decrease of catalytic ability.
研究领域:
材料科学
·
光催化
·
环境化学
·
纳米材料
·
能源材料
✓ 已验证
DOI
高影响因子
Advanced Intelligent Systems
·
2020
·Vol. 2
·期 3
·1900159
·
IF 0
Jiajia Wang,Huiying Wu,Xiaoya Liu,Qiying Liang,Zijun Bi,Zicheng Wang,Yuepeng Cai,Renfeng Dong
Real-time visualization of the positions of micro/nanomotors is highly desired for practical applications due to the complex environments that they are used in. However, most reported photocatalytic micromotors can only be tracked in transparent solutions under bright fields, which greatly limits their applications. Herein, photocatalytic micromotors based on Cu 2 O@carbon dot (CDot) particles with excellent fluorescent properties and precise propulsion capabilities in 3D are reported. In the fully green environment of malic acid, the Cu 2 O@CDot micromotors display efficient propulsion under visible light irradiation (as high as 40.85 μm s −1 ). In addition, the propulsion direction of the Cu 2 O@CDot micromotors can be effectively adjusted by changing the direction of light via positive phototaxis. Interestingly, due to the presence of CDots, these new Cu 2 O@CDot micromotors display excellent and stable fluorescence. This study reports the first photocatalytic micromotors with both novel fluorescence properties and excellent propulsion characteristics in biocompatible environments. Due to their excellent fluorescent properties and precise motion control, these Cu 2 O@CDot micromotors hold great potential to perform complex tasks across diverse practical applications.
研究领域:
纳米技术
·
微纳米马达
·
光催化
·
荧光材料
·
生物医学工程
✓ 已验证
DOI
Advanced Intelligent Systems
·
2023
·Vol. 5
·期 3
·2200360
·
IF 7.4
Bing Lei,Hua-Kun Wang,Ke-Hui Wu,Jing Gao,Lu-Jian Chen
As a typical behavior of releasing energy in a short time, catapulting is a way for organisms to adapt to complex and changeable environments, such as crossing terrain obstacles and spreading seeds. The essence of catapulting behavior is that plants and animals use their structural characteristics to control elastic strain energy locking, triggering, and releasing under external stimulation. At present, bistable or multistable structures are attractive for optimizing the system energy and improving the performance of liquid crystal elastomer (LCE) soft actuators. However, the overelaborate designation of such structures makes it a great challenge to achieve fast morphing LCE soft actuators. Here, a light-driven azobenzene liquid crystal elastomer (azo-LCE) soft actuator mimicking the catapulting behavior of fern sporangia is reported. 2D azo-LCE monoliths are simply folded to construct V-shaped structures as 3D catapults, which exhibit higher morphing velocity upon UV light, and the morphing velocity is related to the aspect ratio of films. Furthermore, asymmetric morphing behavior occurs by constructing localized UV irradiation conditions, which greatly improves the morphing velocity. It is envisioned that the origami-inspired azo-LCE catapults can be further designed as the throwing component in fast-morphing soft robots for the remote delivery of microcargoes.
研究领域:
软体机器人
·
智能材料
·
光响应聚合物
·
仿生学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2024
·
IF 4.8
Zibo Cheng,Yeqin Guan,Hong Wen,Zhao Li,Kaixun Cui,Qijun Pei,Shangshang Wang,Claudio Pistidda,Jianping Guo,Hujun Cao,Ping Chen
Lithium hydride (LiH), a saline hydride with a hydrogen density of 12.6 wt %, is highly thermostable, which hinders its extensive application in hydrogen storage. In this study, we demonstrate a distinct photodecomposition of LiH under ambient conditions. Ultraviolet–visible (UV–vis) illumination induces hydrogen release and creates surface hydrogen vacancies on LiH. The subsequent H– migration enables hydrogen desorption and the accumulation of vacancies at the subsurface, resulting in the generation of metallic Li clusters. Rehydrogenation, on the contrary, can be charged under UV–vis illumination in 1 bar H2. Such phenomena show that the thermodynamic and kinetic limits in the re/dehydrogenation of LiH can be broken under illumination, which allows hydrogen storage over the LiH surface at temperatures ∼600 K lower than those of the corresponding thermal process. This work provides new insights into the interaction of semiconducting hydrides and photons and opens an avenue for the development and optimization of materials for hydrogen storage and related photodriven reactions.
研究领域:
储氢
·
材料科学
·
表面化学
·
光化学
·
半导体氢化物
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Yatao Zou,Ya Li,Xinghan Pang,Yuhang Song,Weidong Xu,Baoquan Sun
Manipulating the crystallization dynamics of perovskite emitters is an effective strategy for preparing high-performance perovskite light-emitting diodes (PeLEDs). In general, amorphous-like thermodynamically stable intermediates are desirable for a retarded and controllable crystallization process of perovskite emitters. Despite a variety of well-demonstrated strategies for crystallization control, it has been generally realized that perovskite thin-film emitters show problematic reproducibility. Here, we unraveled that the coordinating solvent vapor residues could raise deleterious influences on the formation of amorphous intermediate phases, which thus leads to varying crystal qualities from batch to batch. We demonstrated that undesirable crystalline intermediate phases tend to form with a strong coordination solvent vapor atmosphere, which alters the crystallization process and thus brings about additional ionic defects. By applying an inert gas flush strategy, this detrimental effect could be effectively mitigated, enabling PeLEDs with high reproducibility. This work provides new insight into the fabrication of efficient and reproducible perovskite optoelectronics.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Shixu Yang,Chenghao Bi,Jianjun Tian
Metal halide perovskite colloidal quantum dots (QDs) show great potential application for lighting and high-definition displays because of their wide color gamut (∼140%), high photoluminescence quantum yield (PLQY), and narrow emission widths. However, they face a big challenge to obtain directly highly pure white light-emitting colloidal QDs with a single component. Here, we devise a bromide-ligand-assisted synthesis method to prepare white light-emitting Mn2+-doped perovskite colloidal QDs. The didodecyldimethylammonium bromide (DDAB) is used to trigger both anion and ligand exchanges of Mn/CsPbCl3 QDs. By regulating the exchange reactions, the balanced emission intensities of the band edge emission of the QD host and Mn2+ emission are achieved to obtain white light emission. Moreover, the Br– ions from DDAB can bond with uncoordinated Pb2+ of the QD surface, thereby reducing the surface trap density of QDs. As a result, the QDs show pure white light emission with a Commission International de l’Eclairage (CIE) coordinate value of (0.31, 0.33) and a high photoluminescence yield of 66%. This work demonstrates a novel strategy for pure white light-emitting diodes using single-component perovskites.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
照明技术
✓ 已验证
DOI
高影响因子
Smart Medicine
·
2023
·
IF 0
Danna Liang,Gaizhen Kuang,Xiang Chen,Jianhua Lu,Luoran Shang,Weijian Sun
Nitric oxide (NO) has shown great potential in tumor therapy, and the development of a platform for precise and controllable NO release still needs to be explored. Herein, a microfluidic electrospray strategy is proposed for the fabrication of hydrogel microspheres encapsulating NO donors (S-nitrosoglutathione, GSNO) together with black phosphorus (BP) and chemotherapeutic doxorubicin (DOX) as microcarriers for tumor therapy. Based on the excellent photothermal property of BP and thermal sensitivity of GSNO, the microcarriers exhibit a near-infrared light (NIR)-responsive NO release behavior. Besides, the photothermal performance of the microcarriers accelerates the release of DOX. All these contribute to the excellent tumor-killing effect of the microcarriers by combining multiple therapeutic strategies including NO therapy, photothermal therapy, and chemotherapy. Moreover, it was demonstrated that the NIR-responsive NO delivery microcarriers could significantly inhibit tumor growth without apparent side effects in vivo. Therefore, it is believed that the novel NIR-responsive NO microcarriers are promising candidates in clinical tumor therapy applications.
研究领域:
生物医学工程
·
肿瘤学
·
药剂学
✓ 已验证
DOI
International Journal of Applied Ceramic Technology
·
2024
·Vol. 22
·期 1
·e14888
·
IF 1.8
Qi Sha,Jianjun Xie,Yesen Duan,Wenyu Tang,Jingxian Zhang
Digital light processing (DLP) three-dimensional printing has the advantages of both high printing resolution and efficiency and has been used to manufacture high-precision, small, and complex shaped ceramic parts. One of the challenges of DLP is to develop photosensitive ceramic slurries with high solid content and low viscosity, especially for non-oxide ceramics such as silicon nitride due to the dispersion and light absorption problem. This study mainly explores the dispersibility of silicon nitride in ultraviolet (UV)-cured resins and the photocured properties of the slurry. Rheological measurements were utilized to characterize and screen different dispersants in the resin. It was found that DISPERMP is an effective dispersant. In order to improve the curing depth of Si 3 N 4 photosensitive paste, the surface of silicon nitride powder was treated by oxidation, and organic compounds with different refractive indices were also introduced to increase the light penetration depth. It was found that glycerol with a refractive index of 1.474 resulted in the greatest improvement in the curing depth of Si 3 N 4 photosensitive paste. Finally, a proposed slurry composition was developed to successfully print silicon nitride ceramics through UV-curing molding technology.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2022
·
IF 8.663
Wei Jiao,Lili Zhang,Ruiquan Yang,Jing Ning,Lei Xiao,Yifan Liu,Jianyi Ma,Nasir Mahmood,Xian Jian
Increasing visible light absorption and constructing an active surface for TiO 2 have long been pursued to obtain high photocatalytic activities. Modifying TiO 2 at an atomic scale is desirable to optimize its surface state and band structure but remains a huge challenge. Herein, we developed an ultrasmall (∼5 nm) visible-light-responsive TiO 2 photocatalyst with a novel hybrid structure (TiO 2 /C) through a chemical vapor deposition process on large scale. Environmental in-situ transmission electron microscope studies confirmed the anatase TiO 2 with a monolayer carbon shell in a hybrid structure. The resulted structure possesses narrowed bandgap 2.83 eV, favoring the enhanced visible-light-responsive photocatalytic activity. Density functional theory (DFT) simulations confirm the tunable mechanism of carbon-induced localized energy band within the bandgap of TiO 2 . As a physical barrier without turning TiO 2 black, the monolayer carbon shell stabilizes Ti 3+ inside TiO 2, facilitates the separation of photo-induced carriers and enriches abundant absorbing sites of target pollutants. Consequently, the TiO 2 /C exhibits outstanding photocatalytic performance in both photoelectrochemical water oxidation and dye degradation under visible light besides superior activity for hydrogen evolution under simulated sunlight irradiation. This design proved a meaningful strategy in obtaining visible-light-responsive photocatalysts with a stable active surface for industrial application.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）