GIANT
·
2024
·
IF 5.4
Xiaohui Sun,Jiuyue Zhang,Xu Li,Xuelei Gong,Debin Kong,Linjie Zhi
Alternating current electroluminescent (ACEL) devices have attracted tremendous attention due to their significant applications in bioinspired electronics, smart wearables, and human-machine interfaces. However, it still faces limitations in real-time visual temperature sensing. Herein, a universal strategy is established to achieve real-time temperature dynamic visualization by integrating a thermochromic layer through a simple spin coating procedure. Such elaborate integration permits the device to display a wide array of luminous colors and achieve high-contrast color transitions in response to ambient temperature variations. More importantly, a quantitative relationship can be established between the temperatures and the luminous color changes. This advancement not only enhances multi-color emission capabilities but also enables the display of diverse information, marking a significant stride in the development of dynamic temperature sensing in ACEL devices.
研究领域:
材料科学
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生物医学工程
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柔性电子学
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智能传感
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人机交互
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2021
·
IF 3.407
Wenjia Li,Chang Liu,Dong Liu,Shuda Liu,Tianyan You
The demand for efficient methods to determine mercury ion (Hg 2+ ) is increasing. Herein, we developed a ratiometric fluorescence assay by the coupling of nanozyme and fluorescence resonance energy transfer (FRET) to determine Hg 2+ . Platinum nanoparticles (PtNPs) was synthesized as effective nanozyme to catalyze the oxidation of o-phenylenediamine (OPD) at the presence of hydrogen peroxide (H 2 O 2 ) to produce 2,3-diaminophenazine (DAP). The fluorescence emission of Si quantum dots (QDs) at 414 nm (I 414 ) was observed to be quenched by DAP (emission at 576 nm (I 576 )) via FRET mechanism, whereas Hg 2+ can depress the catalytic activity of PtNPs to generate DAP. Based on this principle, SiQDs/PtNPs/OPD/H 2 O 2 -based ratiometric fluorescence assay was developed that the emission ratio of DAP and SiQDs (I 576 /I 414 ) decreased with a higher concentration of Hg 2+ . Noteworthy, the sensitivity of such system was found to be related with the value of I 576 /I 414 . The developed assay offered a detection range of 20–3000 nM and a detection limit of 10.5 nM. This assay was applied to analyze Yangtze river water, and its reliability has been validated by the standard ICP-MS method. Our work provided an effective and convenient method for Hg 2+ detection.
研究领域:
分析化学
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环境监测
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纳米生物技术
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分子探针
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重金属检测
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DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 11
·5202-5211
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IF 3.5
Die Hu,Ran Xiao,Xiang Lv,Chunwei Yang,Jianxia Liu,Yuefeng Zhao,Ning Guo
The realization of thermally stable Tb3+-doped green emission at high temperatures in solid-state lighting is still a crucial challenge. Nevertheless, the study on modulating the thermally stable luminescence at high temperatures is seldom reported. The position of the intervalence charge transfer (IVCT) energy level is used to systematically investigate the thermal quenching performance of Tb3+-activated green-emitting phosphors with varying concentration gradients of Gd1−xTaO4:xTb3+ (x = 0.1%, 0.5%, and 2%) in this study. The IVCT energy levels were determined according to the empirical formula to show a decreasing trend, consistent with the position of the IVCT energy levels measured in the excitation and diffuse reflectance spectra. Moreover, the thermal quenching performance of different wavelength excitation positions (host absorption, 4f–5d of Tb3+, and Tb3+–Ta5+ IVCT band) is quite different. The modulation of thermal quenching performance among distinct phosphors when subjected to host excitation or IVCT excitation can be elucidated through optimal positions within the energy levels associated with IVCT. The diverse concentration gradient samples exhibit varying degrees of thermal quenching performance in the variable-temperature spectra. The fluorescence lifetimes of the samples are generally comparable but slightly lower. The quantum efficiency rapidly improves as the Tb concentration increases. The underlying mechanism governing this phenomenon is elucidated by constructing a model that encapsulates the interplay between the compensating and quenching channels, in addition to the energy conversion of Tb3+ into Gd3+. The abovementioned results indicate that the dual driving scheme of the doping concentration and excitation wavelength is an effective means to regulate the thermal quenching performance of Tb-activated green-emitting tantalate phosphors.
研究领域:
材料科学
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发光材料
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固体化学
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光电子学
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无机功能材料
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DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 43
·16757-16763
·
IF 4.569
Chaojie Li,Jiyou Zhong,Huan Jiang,Peng Shi
Compact broadband near-infrared (NIR) light sources generated by phosphor-converted light-emitting diodes (pc-LEDs) have attracted considerable interest in emerging smart NIR spectroscopy applications. However, discovering a highly efficient and thermally stable broadband NIR phosphor still remains a significant challenge. Here, we report a new efficient garnet phosphor, Gd3In2Ga3O12:Cr3+, which has a broadband emission peaking at 780 nm with a full-width at half maximum (FWHM) of 124 nm. The optimized Cr3+-doping concentration of this material is particularly high (9 mol%), resulting in a high quantum yield and absorption efficiency of 85.3% and 49.1%, respectively. Moreover, 87.7% of the initial emission intensity can be retained when heating up to 150 °C, demonstrating the excellent thermal stability of this material. Fabricating a prototype NIR device by using the as-prepared material in combination with a blue LED chip, an excellent NIR output power (33.7 mW) with a NIR photoelectronic conversion efficiency of 12.0% can be achieved under a 100 mA driving current. These results indicate that the Gd3In2Ga3O12:Cr3+ phosphor may have great potential for broadband NIR pc-LED applications.
研究领域:
光学材料
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生物医学光子学
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分子成像
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转化医学
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半导体器件
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光电子学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Kai Wang,Nini Zhao,Haiyan Xie,Jingzhi Wang,Wenli Xu,Zhiliang Jin
Improving the separation efficiency of semiconductor photogenerated carriers is an important way to enhance the photocatalytic activity of water splitting. To establish an efficient photocatalytic hydrogen production system, a practical method combining metal-like cocatalysts with semiconductors was designed. This article prepared Ni-CdS by modifying Prussian blue analogues and synthesized Ni-CdS/1T-WS 2 composite materials by low-temperature mixing with metal-like catalyst 1T-WS 2 . At the optimal load concentration, it can reach 62.65 mmol g -1 . Firstly, the close contact interface formed between the two enables rapid transfer of photo generated electrons . Secondly, metal-like cocatalysts have a strong attraction to the charges generated by light, forcing electron hole separation and exacerbating this effect under illumination. This has been strongly demonstrated through a series of characterizations and in-situ radiation X-ray photoelectron spectroscopy. In summary, this study provides a reliable and clear understanding for the modification of Prussian blue analogues and the regulation of photo induced charge transfer by metal-like cocatalysts.
研究领域:
材料科学
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物理化学
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能源催化
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半导体光催化
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纳米材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Junlong Zhang,Yan Lu,Lei Ge,Changcun Han,Yujing Li,Yangqin Gao,Songsong Li,Hao Xu
Novel AuPd bimetallic alloy nanoparticles (NPs) decorated two-dimensional (2D) BiVO 4 nanosheet photocatalysts were successfully synthesized via mild wet-chemical process and facile deposition procedure. The composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronic microscope (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflection spectroscopy (DRS), electron spin resonance (ESR) and surface photovoltage spectroscopy (SPV). The 1.0 wt% AuPd/BiVO 4 nanosheets showed highest photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light (300 W Xe lamp coupled with a UV-cutoff filter (λ ≥ 400 nm)), and the photocatalytic efficiency was improved for about 21.9 and 6.1 times as compared to that of pure BiVO 4 and 1.0 wt% Au/BiVO 4 , respectively. The novel AuPd/BiVO 4 composites may make a way to synthesize 2D semiconductor composites with potential applications for solar energy conversion and environmental purifications.
研究领域:
材料科学
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光催化
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纳米材料
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环境净化
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能源化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 16
·8659-8666
·
IF 7.443
Yongji Xin,Linen Wu,Lei Ge,Changcun Han,Yujing Li,Siman Fang
In this work, a novel AuPd bimetallic nanoalloy decorated ultrathin 2D titanium dioxide (TiO2) nanosheet with high H2 evolution activity was prepared via a facile in situ synthesis method. The physical and photophysical properties of the as-prepared AuPd/TiO2 nanosheets were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR) and surface photocurrent spectroscopy (SPC). The photocatalytic H2 evolution experiments indicate that the AuPd co-catalysts can efficiently promote the separation of photogenerated charge carriers in TiO2, and consequently enhance the H2 evolution activity. The 0.3 wt% AuPd/TiO2 sample shows the highest catalytic activity, and the corresponding H2 evolution rate is 526 μmol h−1 g−1, which is 31 times higher than that of pure TiO2 under simulated sunlight (λ > 300 nm) irradiation. A possible mechanism of the enhanced simulated sunlight catalytic performance of AuPd bimetallic nanoparticle (NP) decorated TiO2 nanosheets is proposed to guide further improvement of desirable functional materials. It is expected that the AuPd decorated TiO2 nanosheets obtained via a simple synthesis approach can be used as efficient photocatalysts and exhibit promising potential for new energy applications.
研究领域:
材料科学
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光催化
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纳米材料
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能源化学
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半导体物理
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Boran Xu,Yandong Li,Yangqin Gao,Shuang Liu,Da Lv,Sujun Zhao,Hang Gao,Guoqing Yang,Ning Li,Lei Ge
A novel plasmonic photocatalysts of Ag-AgI/Bi 3 O 4 Cl was successfully synthesized via a simple and mild wet-chemical process. The 30 wt% Ag-AgI/Bi 3 O 4 Cl photocatalyst showed the highest photocatalytic activity for degradation of methyl orange (MO) under visible light (5 W LED lamp), which represents a 3.2 and 7.4 times enhancement in the photocatalytic degradation efficiency as compared to pure Bi 3 O 4 Cl and Ag-AgI, respectively. The surface plasmon resonance (SPR) effect of Ag nanoparticles (NPs) was detected by the UV–vis diffusion reflectance spectroscopy (DRS) and surface photovoltage (SPV) measurement, finding that the SPR effect of Ag extends the absorption and photo-response range in the Ag-AgI/Bi 3 O 4 Cl composite photocatalyst. Based on the analysis of electron spin resonance (ESR), linear sweeping voltammetry (LSV) characterization results, three electron transfer processes were proposed: AgI CB → Bi 3 O 4 Cl CB , AgI CB → Ag and methyl orange → Ag. Such electron transfer paths can not only effectively improve the separation efficiency of photo-generated carriers, but also ensure the stability of the catalyst. This study can provide a novel insight for modification of other desirable semiconductor materials to achieve high photocatalytic activity.
研究领域:
材料科学
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环境化学
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物理化学
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纳米催化
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半导体光催化
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DOI
高影响因子
Polymer Chemistry
·
2015
·Vol. 6
·期 18
·3537-3542
·
IF 5.52
Suping Bao,Qihua Wu,Wei Qin,Qiuling Yu,Jing Wang,Guodong Liang,Ben Zhong Tang
The glass transition of polymers is an immensely-used yet less-understood phenomenon concerning the dynamics of polymer chains in bulk or in confined surroundings, which dictates directly their performances in engineering sectors. Monitoring of the glass transitions or dynamics of polymers is hampered by the lack of facile yet robust methodologies. Herein, we developed a sensitive, reliable and straightforward approach for the detection of glass transitions of polymers using fluorescent probes based on aggregation induced emission (AIE) luminogens. Fluorescence emission of polymers doped with AIE luminogens, including tetraphenylethene (TPE) or its derivatives, showed a sensitive response to the glass transitions of polymers. The sensitivity of fluorescence to glass transition could be optimized by increasing TPE loading. Fluorescence intensity of TPE-doped polymers dropped as much as 25 fold with increasing temperature in the investigated range. The temperature dependence of the fluorescence intensity gave rise to the straightforward determination of the glass transitions of the polymers. Moreover, it is worth mentioning that simply mixing AIE luminogens with polymers, rather than covalently labeling, is possible due to the AIE characteristics of the probes. This significantly facilitated measurements. Given the significant advantages of AIE luminogens as probes, including high and tunable sensitivity, immunity to aggregation, facile operation and simple data processing, fluorescence techniques based on AIE luminogens offer new access for the investigation of the glass dynamics of polymer chains in confined spaces.
研究领域:
高分子科学
·
材料物理
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分析化学
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软物质物理
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功能材料
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DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Shen Liyan,Xing Zipeng,Zou Jinlong,Li Zhenzi,Wu Xiaoyan,Zhang Yuchi,Zhu Qi,Yang Shilin,Zhou Wei
Black TiO 2 nanobelts/g-C 3 N 4 nanosheets laminated heterojunctions (b-TiO 2 /g-C 3 N 4 ) as visible-light-driven photocatalysts are fabricated through a simple hydrothermal-calcination process and an in - situ solid-state chemical reduction approach, followed by the mild thermal treatment (350 °C) in argon atmosphere. The prepared samples are evidently investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, N 2 adsorption, and UV-visible diffuse reflectance spectroscopy, respectively. The results show that special laminated heterojunctions are formed between black TiO 2 nanobelts and g-C 3 N 4 nanosheets, which favor the separation of photogenerated electron-hole pairs. Furthermore, the presence of Ti 3+ and g-C 3 N 4 greatly enhance the absorption of visible light. The resultant b-TiO 2 /g-C 3 N 4 materials exhibit higher photocatalytic activity than that of g-C 3 N 4 , TiO 2 , b-TiO 2 and TiO 2 /g-C 3 N 4 for degradation of methyl orange (95%) and hydrogen evolution (555.8 μmol h −1 g −1 ) under visible light irradiation. The apparent reaction rate constant (k) of b-TiO 2 /g-C 3 N 4 is ~9 times higher than that of pristine TiO 2 . Therefore, the high-efficient laminated heterojunction composites will have potential applications in fields of environment and energy.
研究领域:
材料科学
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光催化
·
纳米材料
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环境功能材料
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能源材料
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半导体物理
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表面化学
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DOI
高影响因子
RARE METALS
·
2021
·Vol. 40
·期 5
·1077-1085
·
IF 4.003
Song Yue-Xin,Ma Wen-Qi,Chen Jing-Jing,Xu Jiao,Mao Zhi-Yong,Wang Da-Jian
In this work, 15 types of rare earth (Re) ions, including Y 3+ , La 3+ , Ce 3+ , Pr 3+ , Nd 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Tb 3+ , Dy 3+ , Ho 3+ , Er 3+ , Tm 3+ , Yb 3+ and Lu 3+ doped perovskite SrTiO 3 powders were synthesized by sol–gel method. The influence of Re ions doping on the crystal structure, morphology and optical property as well as the photocatalytic activity for the photodegradation of rhodamine B (RhB) was investigated in detail when the synthesized Re ions doped SrTiO 3 powders were served as catalysts. The presented results revealed that the crystal structure is invariable, whereas the morphology and the optical bandgap are variable for the resultant SrTiO 3 powders when different Re ions were incorporated into the SrTiO 3 lattice. The relatedness between the morphology, optical property and photocatalytic activity of the synthesized SrTiO 3 catalysts doped with variable Re ions were analyzed deeply, providing an insight into the influence factors on the photocatalytic activity of catalysts. Graphic abstract
研究领域:
材料化学
·
光催化
·
无机功能材料
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环境催化
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纳米材料
✓ 已验证
DOI
高影响因子
KINETICS AND CATALYSIS
·
2025
·
IF 1.4
Jiang Xin,Zeng Zhenxing
Interfacing two semiconductors for heterojuctions construction has been considered as an effective way to facilitate electron-hole separation, thus improving the photocatalytic activity. In this paper, PCN-224/g-C 3 N 4 heterojunction was constructed by PCN-224 and g-C 3 N 4 using a solvothermal method. Transmission electron microscopy (TEM) images reveal a well-matched, smooth interface between PCN-224 and g-C 3 N 4 , demonstrating the successful formation of a tight junction. Photoelectric performance tests confirm that the heterojunction significantly enhances the light absorption capability within the visible range and improves the efficiency of electron-hole separation. Herein, the PCN-224/g-C 3 N 4 heterojunction exhibited excellent photocatalytic activity in both disinfection and organic pollutant degradation. Under visible light irradiation (λ > 420 nm) for 3 h, it completely degraded phenol and effectively inactivated E. coli . In the photocatalytic process, electrons migrate from the conduction band of g-C 3 N 4 to PCN-224, while holes transfer from the valence band of PCN-224 to the valence band of g-C 3 N 4 , thereby generating \({\text{O}}_{2}^{{\bullet - }}\) and h + radicals. These generated radicals effectively oxidize and degrade phenol.
研究领域:
材料科学
·
环境科学
·
化学工程
·
纳米技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）