JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Yue Lei,Wang Bo,Huang Yiheng,Feng Changhao
In this study, gas sensors based on Er-doped ZnFe 2 O 4 nanofibers (E-ZFO NFs) with varying ratios of Er doping were prepared by a facile electrospinning approach. The sensor based on 3% E-ZFO NFs demonstrated an enhanced response value of 30.3 for 100 ppm n -butanol at 175°C, with response and recovery times of 9 s and 94 s, respectively. This is approximately 3.1 times that of undoped ZFO NFs. Moreover, the sensor exhibited a minimum detection limit of 0.1 ppm, with excellent repeatability and selectivity. These results indicate that the sensors utilizing E-ZFO NFs are promising candidates for n -butanol gas sensors.
研究领域:
材料科学
·
传感技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yike Fu,Xiang Li,Chuanbin Sun,Zhaohui Ren,Wenjian Weng,Chuanbin Mao,Gaorong Han
The design of multifunctional localized drug delivery systems (LDDSs) has been endeavored in the past decades worldwide. The matrix material of LDDSs is known as a crucial factor for the success of its transformation from the laboratory to clinical practices. Herein, a biocompatible ceramic, strontium titanate (SrTiO3, STO), was utilized as the matrix. A variety of fine Er doped SrTiO3 (STO:Er) nanofibers were fabricated via electrospinning. After the surface functionalization with amino groups, the drug loading capacity of STO:Er nanofibers is dramatically increased. The nanofibers present a rather sustained drug releasing behavior in the media with pH of 7.4, and the release kinetics is significantly accelerated with the decreased pH value from 7.4 to 4.7. Furthermore, the intensity of the spectrum emitted from the STO:Er nanofibers corresponds well with the drug releasing progress under the excitation of near-infrared spectrum (∼980 nm). Fast drug release behavior (in an acid environment) induces a rapid intensity enhancing effect of photoluminescence emission and vice versa. The main mechanism is attributed to the quenching effect induced by the C-Hx groups of IBU molecules with vibration frequencies from 2850 to 3000 cm–1. Such new STO:Er nanofibers with pH-triggered and optically monitored drug delivery functionalities have therefore been considered as another new localized drug delivery platform for modern tumor diagnosis and therapy.
研究领域:
材料科学
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生物医学工程
·
肿瘤学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Zepeng Rao,Xiaofeng Xie,Xiao Wang,Asad Mahmood,Shengrui Tong,Maofa Ge,Jing Sun
A series of Er-doped TiO2 photocatalysts, using Er(NO3)3·6H2O precursor ranging from 0.5 to 2 mol %, were synthesized via sol–gel method with titanium(IV) isopropoxide solution as reactant. The structure and properties of as-prepared samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV–vis spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy, thermogravimetric analysis, photoluminescence, electrochemical impedance spectroscopy, and photocurrent. The as-synthesized Er-doped TiO2 nanoparticles demonstrated improved photocatalytic activities for the photodegradation of selected volatile organic compounds, including acetaldehyde, o-xylene, and ethylene. Additionally, high photodegradation of acetaldehyde was recorded in the visible region (λ > 420 nm). XPS analysis revealed that a handful of Er in anatase TiO2 was presented in the form of Er2O3, which benefited by increasing the specific surface area ranging from 59.28 to 110.34 m2/g and consequently enhanced the adsorption capacity for acetaldehyde, o-xylene, and ethylene 3.3, 3.7, and 3.8 times, respectively, in contrast to the undoped TiO2. Electron spin resonance results showed that Er doping caused production of oxygen vacancies (VO) and Ti3+, which promoted the photocatalytic activity of the catalyst. The TiO2 samples containing 0.5–1.5% Er content exhibited higher photoactivity in comparison with other samples. The highest removal efficiency of acetaldehyde and o-xylene within 100 min was 99.2 and 84.6%, respectively, and ethylene degradation efficiency reached 22.4% within 180 min. Furthermore, the visible light elimination efficiency of acetaldehyde was 25.5%. Finally, the results suggested that Er doping predominantly inhibited the catalyst poisoning in the degradation of o-xylene.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yuhang Chen,Qi Xue,Weiguo Luo,Yu Sun,Xiaonong Zhang,Di Lu,Xin Qian,Chun-Chao Chen,Ming Li,Tao Hang
Zinc oxide nanoparticles (ZnO NPs) as promising and nontoxic fluorescent labels are currently developed for cell imaging owing to their excellent biocompatibility. However, the low intensity of the emission band and stability of ZnO NPs have restricted their further applications. In this work, 5 mol % rare-earth metal erbium (Er)-doped ZnO nanoparticles with poly(ethylene glycol) (PEG) surface modification (Er-doped ZnO/PEG NPs) are fabricated by the sol–gel method. Their fluorescence characteristics and biodegradation behavior are investigated. The results indicate that the visible photoluminescence of Er-doped ZnO/PEG NPs has been dramatically enhanced by 631.6% compared with that of bare ZnO NPs. After being stored for one month, particle size variation is less than 1 nm, and fluorescence performance can be well retained. Furthermore, the degradation and cytotoxicity results confirm the degradable and biocompatible characteristics of Er-doped ZnO/PEG NPs, thus extending their potential applications for cell imaging.
研究领域:
材料科学
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细胞生物学
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生物医学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 12
·11043-11053
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IF 2.195
Zheng Jianfeng,Deng Xueshuang,Zhou Xin,Yu Meidong,Xia Zhetao,Chen Xiaohong,Huang Sumei
We report a strategy to fabricate high quality TiO 2 nanrod array ETLs for efficient PSC devices with Cs 0.05 (MA 0.17 FA 0.83 ) 0.95 Pb(I 0.83 Br 0.17 ) 3 triple cation composition perovskite as light absorption material. Mg doped compact TiO 2 (c-TiO 2 ) was employed as seeds for hydrothermal growth of one-dimensional (1D) TiO 2 nanorod (NR) arrays. Assisted with these seed layers, Mg and Er doped TiO 2 rutile NR arrays were synthesized using tetrabutyltitanate (TBT) and Er(NO 3 ) 3 as Ti and Er precursors, respectively. It was found that uniform, straight and vertical TiO 2 NRs with a high area density were formed using Mg and Er co-modification, improving the pore-filling and crystallization of the triple cation perovskites, facilitating charge separation and suppressing recombination at the perovskite/titania NR interface of the PSC device. The shorter PL decay time with Mg/Er doping compared to the cases without Mg or Er doping is assigned to the more excellent electron extraction from the mixed cation perovskite film. The control device without modification shows an average power conversion efficiency (PCE) of 17.10%. Under the same fabrication conditions, doping of the single element Er or Mg or both Mg and Er enhances the average PCE to 17.54, 18.41 and 18.99% respectively. Our champion cell based on Mg/Er modified TiO 2 NR arrays demonstrates a PCE of 19.11%, exhibiting an enhancement of 10.33% compared with that of the PSCs based on unmodified TiO 2 NR arrays (17.32%). This work provides a simple and efficient interface engineering method to improve the efficiency of the mixed cation PSCs.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Lei Wang,Enhai Song,Shuai Zhang,Xiaoshi Hou,Xiaohong Ji,Qinyuan Zhang
Doping is one of the important technologies for modifying the properties of two-dimensional (2D) transition metal dichalcogenides (TMDs). Herein, ultrathin Er-doped MoS2 nanosheets with an enhanced visible-light response have been synthesized by a wet-chemical method. The few-layer characteristic of the MoS2:Er nanosheets is beneficial from the H2S generated during the preparation process. Near-infrared emission at ∼1530 nm from MoS2:Er nanosheets has been observed under 980 nm laser excitation, which corresponds to the energy transition from 4I13/2 to 4I15/2 of Er3+. Meanwhile, the enhanced visible-light response of MoS2:Er has been demonstrated by the photocatalytic performance (removing rhodamine B) and photocurrent response compared with undoped MoS2. Based on the experiments and density functional theory calculation, the enhanced visible-light response is attributed to the improved separation capability of photogenerated electron–hole pairs of the ultrathin MoS2:Er nanosheets. Er-doping induces an increase of S vacancies and the energy transfer between Er3+ ions and the host. The work demonstrates a developed universal and recyclable synthesis strategy for various metal-doped MoS2 nanosheets and their applications in the fields of photocatalysis and photodetection.
研究领域:
材料科学
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纳米技术
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光催化
·
光电
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Guibin Zhang,Xin Wang,Yaqian Du,Jun Wang,Xuebing Yang,Ta La,Jianbo Li
SrTiO3 exhibits promising potential in both thermoelectric and optical properties. However, research on these two properties has consistently been carried out in two relatively independent fields. In this work, the regulatory mechanisms of thermoelectric and optical properties were proposed based on photon-excited electron–phonon interactions. Er doping can enhance the photon absorption of SrTiO3 by introducing impurity energy levels, thereby promoting photoexcited electron generation. The introduction of oxygen vacancies (Vo) enhances the interaction between excited electrons and phonons through defect levels, facilitating the conversion of photon energy into thermal energy and subsequently into electrical energy. Additionally, Er–Nb codoping with Vo synergistically optimizes thermoelectric properties, thereby laying a foundation for the regulation of photothermoelectric properties. As a result, significant photothermoelectric conversion was obtained in the Sr0.85Er0.15Ti0.9Nb0.1O3 (Vo) sample. A maximum ZT value of 0.32 at 1073 K was achieved in this sample, representing a 60% improvement over previously reported Nb-doped SrTiO3 samples. The electrical output power of the Sr0.85Er0.15Ti0.9Nb0.1O3 (Vo) sample reaches 3.85 μW under portable 980 nm laser excitation at 260 mW incident power. These findings provide valuable insights into the conversion of light energy to electrical energy in highly absorptive SrTiO3-based thermoelectric materials.
研究领域:
材料科学
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热电学
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光电子学
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能量转换
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固体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Lei Wang,Shuai Zhang,Long Yan,Xiaohong Ji,Qinyuan Zhang
The electronic and optical properties of two-dimensional transition metal dichalcogenides can be tuned by a doping strategy. Herein, spiral and monolayer Er-doped WS2 (WE) flakes have been synthesized by chemical vapor deposition using ErCl3, WO3, and S as precursors. The growth and properties of WE flakes have been systematically studied based on experimental and theoretical analysis. The morphology, size, and thickness of WE flakes can be regulated by adjusting the molar ratio of ErCl3/WO3 and the growth time. It has been found that the ErCl3 precursor not only acts as the promoter of the WE flakes during the growth but also drives the formation of screw dislocations owing to the internal strain in the lattice induced by Er3+ doping. The WE flakes exhibit near-infrared (NIR) emission at ∼1530 nm under 980 nm excitation, which corresponds to the energy transition from 4I13/2 to 4I15/2 of the Er3+ dopants. In addition, the WE-based device exhibits improved NIR photoresponse with a 16.9-fold enhancement in photocurrent compared with that of the WS2-based device. Our work provides a simple method for the preparation of highly crystalline WE flakes with NIR emission and enhanced NIR photoresponse.
研究领域:
材料科学
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光电子学
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纳米技术
·
半导体物理
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 38
·2105001
·
IF 18.808
Yushuai Xu,Jian Han,Yidong Luo,Yaochun Liu,Junping Ding,Zhifang Zhou,Chan Liu,Mingchu Zou,Jinle Lan,Ce-wen Nan,Yuanhua Lin
Gaseous CO 2 reduction driven by solar energy is a promising solution to the current energy crisis and environmental problems. Although thermocatalysts, electrocatalysts, and photocatalysts are developed as classical strategies for CO 2 reduction, it remains a challenge for high efficiency and CO 2 net reduction during this process. Here, a multi-field driven hybrid catalyst, Pt/ZnO nanorod arrays/Bi 1-x Er x CuSeO, is designed using the photo-thermoelectric effect, which can take advantage of both photocatalysis and thermocatalysis. The results indicate that the maximum CO production rate of 2.91 µmol g −1 h −1 at 423 K can be realized in such Pt/ZnONR/Bi 0.9 Er 0.1 CuSeO hybrid catalyst, as can be ascribed to a synergetic photo-thermoelectric effect (i.e., light irradiation can provide heat, photo-excited carriers, and the concomitant Seebeck voltage). The band alignment of ZnO/BiCuSeO heterojunction and carriers transport are proposed to be optimized by the Er doped BiCuSeO thermoelectric supports, greatly enhancing the catalytic performance. The application of thermoelectric support could be promising in the structure design of multi-field driven hybrid catalysts, and such a photo-thermoelectric catalytic process demonstrates a desirable way of solar energy utilization in CO 2 transformation.
研究领域:
材料科学
·
催化
·
可再生能源
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环境科学
✓ 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）