JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiaoqing Guo,Shuangju Song,Xue Jiang,Jingru Cui,Yunshuai Li,Wenqing Lv,Haiyan Liu,Yuanyuan Han,Liyong Wang
In this present work, a room temperature coprecipitation method for the synthesis of CaMoO 4 @SiO 2 :Ln (Eu 3+ , Tb 3+ , Dy 3+ ) phosphors was reported. These particles were characterized using X-ray diffraction (XRD), Energy dispersive spectrometer (EDS), Fourier Transform IR spectroscopy (FTIR), scanning electron microscope (SEM), UV-visible spectrophotometer and photoluminescence (PL) respectively. The results indicated that emission intensity of SiO 2 modified samples increased by about 2 times, compared with no-silica modified samples. Multicolor phosphors were also designed by changing the lattice activators (Eu 3+ , Tb 3+ , Dy 3+ ). To further explore its applications, the transparent photoluminescent film was developed through the incorporation of polyvinyl alcohol (PVA), and selective and sensitive detection performance on dichromate was demonstrated in detail. In addition, red emission LED devices was assembled with as-prepared phosphors. The present results provide not only the high-performance phosphors modified by silica , but also a deep explanation of the structure-property relationship of the as-prepared sample. Based on these findings, it can be foreseen that these microparticles will be applied in versatile filed.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shupeng Sun,Xinlei Li,Yanhui Sun,Nan Wang,Baoyu Huang,Xiaogan Li
Tellurium nanotubes (TeNT) heterojunction with Tellurium oxide (TeO 2 ) were prepared by in situ oxidation at elevated temperatures in air. The chemiresistive type NO 2 sensor was then fabricated by depositing the synthesized TeNT/TeO 2 on the integrated gold electrodes. The response of the TeNT/TeO 2 based sensor to 600 ppb NO 2 was 38.8 %, which was about 3.2 times higher than that of the single-phase TeNT based sensor (12.1 %). The response and recovery time are 39 s and 49 s, respectively, which are substantially reduced compared to those of the pristine TeNT based sensor (133 s and 336 s) and the results reported in literature. The sensor also exhibits good stability with a response deviation of less than 2 % for 45 days and a good resistance to environmental disturbances. The improved sensor performance can be attributed to the heterojunction formed between TeNT and TeO 2 . Density Functional Theory (DFT) calculations show that the formed TeNT/TeO 2 heterojunction enhances the adsorption energy (-0.671 eV) and charge transfer (0.49 |e|) between NO 2 and the TeNT/TeO 2 .
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Ruonan Jiang,Zhenzhen Cai,Huazangnaowu Bai,Yali Liu,Baiyi Zu,Xincun Dou
The precise modulation of the π-conjugated bridge within a probe is of considerable importance for the development of reaction-based fluorescent probes endowed with specific functionalities. Here, a series of naphthalimide-based fluorescent probes with a fluorescence ratio and attenuated sensing properties for H2O2 have been designed by precisely tuning the type of the π-conjugated bridge located between the boric acid recognizing the moiety and the naphthalimide fluorophore. The modulation of the π-conjugated bridge species mainly focused on three structural units, thiophene, benzene, and furan, among which the thiophene helped us to construct the most efficient naphthalimide-based fluorescent probe (E)-(5-(((2-(2-mercaptoethyl)-1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinolin-6-yl)imino)methyl)thiophen-2-yl)boronic acid (MOHB-IMTP). It demonstrated the most remarkable fluorescence changes before and after the reaction and thus a significantly superior sensing performance for H2O2, including fairly good selectivity and a lower limit of detection (LOD, 38.5 nM). In addition, based on cellulose-induced aggregation of the reaction products, the MOHB-IMTP/cellulose probe was further developed and proven to have a faster and more sensitive (4.0 nM) detection toward H2O2. We postulate that this π-conjugated bridge modulation and cellulose signal enrichment strategy will actively promote the development of high-performance fluorescent probes and sensing devices.
研究领域:
分析化学
·
生物传感
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
·
IF 2.88
Yan Liang
Two fluoranthene derivatives with “propeller” structure, named as 7,8,9,10-tetraphenylfluoranthene ( TPFA ) and 3-phenoxy-7,8,9,10-tetraphenyl fluoranthene ( PO - TPFA ), were designed and synthesized by introducing outer phenyl and phenoxy substituents to fluoranthene. Given the steric hindrance of this unique structure, both organic dyes exhibited similar fluorescence spectra and strong fluorescence emission from the solution to the film state. The introduction of a phenoxy group showed obvious influence to the molecular optical properties of fluoranthene. Density functional theory calculations were further conducted to verify this finding. Both dyes were used as fluorescent probes and exhibited and sensitive fluorescence response to nitroaromatic explosives and highly selectivity to picric acid . Furthermore, PO - TPFA exhibited better detection performance to nitroaromatic explosives than TPFA . This work can serve as a guide for molecular fluorescence design because these dyes possess excellent fluorescence in solution and film states and can be used for the sensitive fluorescence detection of nitroaromatic explosives.
研究领域:
化学
·
材料科学
·
爆炸物检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yulong Wang,Xiuwen Xu,Guansheng Xing,Shanxiao Lin,Yurou Yan,Quan Zhou,Jianmei Chen,Wenjuan Zhu,Bing Chen,Shujuan Liu,Qiang Zhao
Halide perovskites hold great potential in developing next-generation X-ray detectors. However, preparing high-quality and thick perovskite films in a way compatible with a thin-film transistor (TFT)-integrated X-ray flat-panel detectors (XFPDs) remains challenging. Here, by engineering ink with effective printability and shape fidelity, direct ink writing (DIW) is developed as a new approach to printing a unique single-crystal-assembled perovskite (SCAP) thick film. In contrast to polycrystalline grains consisting of randomly orientated crystal domains, the SCAP is made of tightly packed crystals with well-defined crystal facets, showing 3–4 orders of magnitude lower trap density (4.48 × 10 12 cm −3 ). Consequently, the SCAP X-ray detectors offers the state-of-the-art detection performance (sensitivity-to-dark current ratio: 1.26 × 10 11 µC Gy air −1 A −1 ), a low detection limit (114.2 nGy air s −1 ), and negligible baseline drift (0.27 fA cm −1 s −1 V −1 ). Furthermore, the XFPD based on a 64 × 64 pixelated TFT array realizes high-resolution digital radiography, opening a new avenue for further development of perovskite X-ray detectors.
研究领域:
材料科学
·
电子工程
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Bin Li,Aolin Wu,Mengjing Zhou,Ying Wang,Zhigang Hu,Lihua Su
In this paper, nitrogen-doped carbon quantum dots (N-CQDs) were prepared by using citric acid as a carbon source and ethylenediamine as a nitrogen source. Then, N-CQDs were added into a deep eutectic solvent (DES) synthesized from acrylamide (AM), urea (U), and choline chloride (ChCl). The N-CQDs/P(AM-U-ChCl) composite hydrogels were prepared by light polymerization. The chemical composition and microstructure of N-CQDs/P(AM-U-ChCl) composite hydrogels were characterized in detail using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). This article further explored the influence of the content of N-CQDs on the mechanical properties, adsorption properties, and detection performance of the composite hydrogel. The results showed that the composite hydrogels exhibited the best mechanical properties when N-CQDs' content was 0.3 wt%. The adsorption performance of N-CQDs/P(AM-U-ChCl) composite hydrogels for Fe3+ was significantly enhanced due to the carboxyl groups contained in N-CQDs. In detecting tert-butylhydroquinone (TBHQ), the composite hydrogel showed a good linear correlation in the concentration range of 0–200 mg L−1, and the detection limit of TBHQ reached 0.849 mg L−1. This study provides a new idea for preparing composite hydrogel materials with excellent mechanical properties and functionality. Also, it demonstrates their potential application value in heavy metal ion adsorption and organic molecule detection.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CyTA-Journal of Food
·
2025
·
IF 1.7
Han Zhao,Xiaohui Duan,Siqi Xie,Lili Cheng,Fei Wang,Wenjuan Xu,Yaolei Zhang,Weiyi Zhang,Cheng Zhao
Listeria monocytogenes is a foodborne pathogenic bacterium that can survive under a wide range of temperature and pH conditions, with a mortality rate of up to 20% −30%. One emerging and validated method of indirectly assessing Listeria monocytogenes in food is detecting 3-hydroxy-2-butanone gas. In this study, WO3 nanoflowers (a diameter of 2.8 µm) and two different hierarchical structures of WO3 were successfully synthesized. XRD, BET, SEM, and TEM were applied to characterize their morphology, microstructure, catalytic structure, and specific surface area. For assessing their gas sensing performances toward 3-hydroxy-2-butanone, a series of gas sensitivity indicators were purposefully measured. The results indicated that WO3 nanoflowers had the best gas sensing performance including high sensitivity (81 @ 20 ppm), rapid response-recovery time (4 s/9 s), low LOD (1 ppm) and good stability. Moreover, by analysing the various characterization results of these materials, the sensitivity mechanism was explained in detail as well.
研究领域:
微生物学
·
材料科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 7
·566
·
IF 4.4
Xinyu Zhang,Xin Cai,Naiqiang Yin,Yingying Wang,Yang Jiao,Chundong Liu
Surface-enhanced Raman scattering (SERS), as one of the most powerful analytical methods, undertakes important inspection tasks in various fields. Generally, the performance of an SERS-active substrate relies heavily on its structure, which makes it difficult to integrate multiple-functional detectability on the same substrate. To address this problem, here we designed and constructed a film of graphene/Au nanoparticles (G/Au film) through a simple method, which can be conveniently transferred to different substrates to form various composite SERS substrates subsequently. By means of the combination of the electromagnetic enhancement mechanism (EM) and the chemical enhancement mechanism (CM) of this structure, the film realized good SERS performance experimentally, with the enhancement factor (EF) approaching ca. 1.40 × 105. In addition, the G/Au film had high mechanical strength and had large specific surface area and good biocompatibility that is beneficial for Raman detection. By further transferring the film to an Ag/Si composite substrate and PDMS flexible film, it showed enhanced sensitivity and in situ detectability, respectively, indicating high compatibility and promising prospect in Raman detection.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Aygul Kadir,Tursun Abdiryim,Xiong Liu,Fangfei Liu,Ruxangul Jamal,Xinsheng Tang,Yaolong Zhang
In the present work, a novel self-powered hybrid ultraviolet (UV) photodetector (PD) based on ZnO @ZnSe nanoarrays/poly(3,4-ethylenedioxyselenophene) (PEDOS) was fabricated and systematically investigated. The designed PD is based on a sandwich configuration and with p-n junction, which is consisting of ZnO as the bottom n- layer, PEDOS as the top of p-layer, and ZnSe as the insertion layer. The results of the study on the performances of UV PD under different conditions optical power density shows that the ZnO@ZnSe/PEDOS exhibits excellent detection of UV light, the device achieves the excellent responsivity (R) 5.44 mA/W and high detectivity (D*) 1.42 × 10 11 Jones under the weaker optical power density (0.32 mW/cm 2 ). The study concludes with a suggestion that the ZnSe layer acts a key role in the superior property of the obtained device, which is introduction of ZnSe layer between the p-PEDOS and n-ZnO layers reduces band migration and thus effectively enhances carrier transport within them, and demonstrating that the responsivity (R) of ZnO@ZnSe/PEDOS is almost 18 times that of the device without the ZnSe layer (0.3 mA/W). On the other hand, as the p- types PEDOS, which enhances the junction quality by reducing the composite center of the carrier, expanding the depletion region and providing a step energy level between the band edges of ZnO and ZnSe, improving the overall collection of photogenerated carriers.
研究领域:
材料科学
·
光电子学
·
半导体器件
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 15
·3779
·
IF 3.1
Jiaji Zhang,Zhihua Xiong,Zi Wang,Jinlong Sun
Bismuth-based compounds have been regarded as a kind of promising material due to their narrow bandgap, high carrier mobility, low toxicity, and strong oxidation ability, showing potential applications in the field of photoelectrochemical (PEC) activities. They can be applied in sustainable energy production, seawater desalination and treatment, optical detection and communication, and other fields. As a member of the broader family of bismuth-based materials, β-Bi2O3exhibits significant advantages for applications in engineering, including high photoelectric response, stability in harsh environments, and excellent corrosion resistance. This paper presents the synthesis of β-Bi2O3thin films utilizing the mist chemical vapor deposition (CVD) method at the optimal temperature of 400 °C. Based on the β-Bi2O3thin film synthesized at optimal temperature, a PEC-type photodetector was constructed with the highest responsivity R of 2.84 mA/W and detectivity D of 6.01 × 1010Jones, respectively. The photodetection performance was investigated from various points like illumination light wavelength, power density, and long-term stability. This study would broaden the horizontal and practical applications of β-Bi2O3.
研究领域:
材料科学
·
光电材料
·
能源与环境科学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2024
·
IF 1.6
Liya Hao,Qihao Yang,Junfeng Zhang,Xinhua Zheng,Yuebin Yuan
A novel yeast-derived carbon dot/cuprous oxide nanocomposite (Y-CDs/Cu2O) electrochemical sensor was developed for paracetamol. The Y-CDs were prepared by a one-step hydrothermal treatment and composited with Cu2O nanoparticles via ultrasonication assembly. Transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy were conducted to characterize the morphology and structure of the synthesized nanomaterials systematically. After modification onto a glassy carbon electrode, the resulting sensor displayed excellent electrochemical performances toward paracetamol with a wide linear range (0.5–100 μM), low limit of detection (LOD, 90 nM), good repeatability, and stability (retaining 94% of initial response after 4 weeks). Remarkably, the electrochemical sensor presented good selectivity against potentially coexisting species. Satisfactory results were obtained for the analysis of commercial pharmaceutical tablets and human serum. The attractive sensitivity could be ascribed to the ultra-small size and surface-abundant functional groups of Y-CDs as well as the superior electroconductivity of Cu2O. Thus, the synergistic effect illustrates the Y-CD-Cu2O hybrid structure is promising for constructing high-performance electrochemical sensors.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 24
·6448-6456
·
IF 7.779
Shan Zhang,Ao Gong,Xinxiang Yang,Pei Han,Ningning Sun,Yong Li,Liwen Zhang,Xihong Hao
The use of ferroelectric materials is believed to be a viable way to construct self-powered photodetectors based on the ferroelectric photovoltaic effect. However, the low photocurrent density of ferroelectric materials is a serious drawback that restricts their photo-detection applications. Herein, ultrahigh photo-detection performances are achieved in hexagonal YbMnO3-based self-powered photodetectors by optimizing the macroscopic polarization. The responsivity (R) and detectivity (D*) can reach 0.18/0.15 A W−1 and 6.73 × 1011/5.76 × 1011 Jones under monochromatic light with a wavelength of 365/700 nm when the YbMnO3 thin film [YbMnO3(1040)] is sintered at 1040 °C. These excellent photo-detection performances are attributed to the high short-circuit current density which reaches 10.9 mA cm−2 under 1 sun illumination. A systematic structure and photo-electric characteristic analysis suggests that the formation of a strong domain and the distortion of the crystal structure lead to an enhanced macroscopic polarization in YbMnO3(1040) without changing the bandgap. The enhanced polarization causes a ripple positive effect, which increases the driving force of photo-generated carrier separation and restrains recombination, leading to a high dissociation efficiency. This work demonstrates that the ferroelectric YbMnO3 thin film has great potential in the photo-detection field.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）