Nanoscale
·
2022
·Vol. 14
·期 39
·14585-14593
·
IF 8.307
Zhiyong He,Yuexu Xiong,Wenlin Feng
Rhenium (Re)-based transition metal dichalcogenides (TMDs) have excellent in-plane anisotropic optical and electrical properties. However, their distorted octahedral (1T′) structure and weak interlayer coupling easily lead to anisotropic and out-of-plane growth, which makes it particularly difficult to prepare large-area Re-based TMD continuous porous films on SiO2/Si substrates. In this work, ReS2 films are synthesized on SiO2/Si substrates by using tellurium (Te) powder-assisted chemical vapor deposition, and then the films are selenized to synthesize a series of continuous large-area ReS2(1−x)Se2x (x = 0, 0.34, 0.56, 0.84, and 0.91) nanosheet-formed porous films. Furthermore, prototype ReS2(1−x)Se2x photodetectors with different Se compositions are fabricated. The surface morphology, high quality crystallization and compositions are confirmed by various characterization techniques. The ReS2(1−x)Se2x photodetectors based on these films show excellent ultraviolet-visible (UV-vis) spectral responses and self-powered characteristics. The response time is faster, and the photocurrent increases with the Se composition. Due to the Schottky barrier generated by the Ag–ReS2(1−x)Se2x interface, the device without bias voltage has a superior responsivity (121.9 mA W−1), high detectivity (5.27 × 1012 Jones), good on/off ratio (1.2 × 103) and fast response time (rising/decay times, 30/60 ms) under 365 nm light irradiation. This simple and controllable method opens up a new way to produce high-quality vertically oriented ReS2(1−x)Se2x porous arrays on SiO2/Si substrates for next-generation application in UV-vis photodetectors.
研究领域:
材料科学
·
光电检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Jove-Journal of Visualized Experiments
·
2019
·
IF 1.108
Yalan Wu,Shengjun Wu,Xin-an Huang,Qingping Zeng,Tao Deng,Fang Liu
Primaquine (PMQ), an important anti-malarial drug, has been recommended by the World Health Organization (WHO) for the treatment of life-threatening infections caused by P. vivax and ovale. However, PMQ has unwanted adverse effects that lead to acute hemolysis in patients with glucose-6-phosphate dehydrogenase (G6PD) deficiency. There is a need to develop simple and reliable methods for PMQ determination with the purpose of dosage monitoring. In early 2019, we have reported an UV-Vis and naked-eye based approach for PMQ colorimetric quantification. The detection was based on a Griess-like reaction between PMQ and anilines, which can generate colored azo products. The detection limit for direct measurement of PMQ in synthetic urine is in the nanomolar range. Moreover, this method has shown great potential for PMQ quantification from human serum samples at clinically relevant concentrations. In this protocol, we will describe the technical details regarding the syntheses and characterization of colored azo products, the reagent preparation, and the procedures for PMQ determination.
研究领域:
药物分析
·
医学诊断
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Saudi Chemical Society
·
2025
·Vol. 29
·期 1
·1-12
·
IF 5.8
Zhang Jilai,Jian Dan,Hu Chenglei,Chen Wenhua,Jiang Ming,Wang Sheng,Su Youbo,Zhang Naiming,Si Zhihao,Lu Menglan
Dissolved organic matter (DOM) strongly influences the geochemical mobility of metal ions, yet little is known about the mechanism of lead (Pb) binding to DOM in the presence of copper (Cu) and zinc (Zn). This research used different types of ultraviolet–visible (UV–vis) spectroscopy analysis technologies, including differential log-transformed spectra coupled with spectral slope calculation, and two-dimensional correlation spectroscopy (2D-COS) analysis to investigate the binding characteristics between Pb and DOM in the presence of Zn and Cu, respectively. The results indicate that the addition both of Zn 2+ or Cu 2+ can reduce the binding of DOM to Pb 2+ , with the effect of Cu 2+ being the most obvious. Specifically, significant changes were evident in the differential log-transformed absorbance at higher Zn 2+ /Cu 2+ concentrations, including modified spectral shapes, absorption wavelength fluctuation, and differential absorption intensity changes. The differential log-transformed absorbance spectral slopes (∆S 350-400 ) exhibited a positive correlation with the predicted NICA-Donnan model value in a wavelength range of 350–400 nm. This suggested that ∆S 350-400 served as an indicator for assessing the complexation characteristics of Pb and DOM binding in the presence of Zn 2+ and Cu 2+ , respectively. The 2D-COS spectral results showed that the presence of Zn 2+ /Cu 2+ changed the binding order of the DOM functional groups in response to Pb 2+ . This study revealed that Zn 2+ and Cu 2+ competed with Pb 2+ for complex sites on the DOM surface in different ways, altering the ability of Pb 2+ to bind with DOM. The results suggest that using differential log-transformed spectroscopy combined with ∆S 350-400 and 2D-COS analyses is a promising approach to understanding the mechanisms of Zn 2+ /Cu 2+ effects on Pb-DOM interactions, which may provide new insights into the prevention, control, and remediation of environmental Pb pollution.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 22
·2313776
·
IF 18.5
Fapeng Sun,Haojie Xu,Wenting Hong,Zhihua Sun,Wei Liu
Metal thio(seleno)phosphates are renowned for their multifaceted physical characteristics and versatile applications, particularly in optoelectronics. In detection applications, a low and stable dark current is crucial, enhancing the sensitivity and signal-to-noise ratio of detectors. Herein, a van der Waals layered material has synthesized, CuInP 2 Se 6 . Despite its nanometric scale, 2D CuInP 2 Se 6 detector transcends the conventional absorption inefficiencies tied to ultrathin materials. It delivers exceptional ultraviolet–visible detection, characterized by an ultralow, stable dark current of 150 fA, and a noise power density of 27.7 fA Hz −1/2 at room temperature. The in-depth investigation reveals a responsivity of 4.47 A W −1 , an external quantum efficiency of 1369%, a special detectivity of 1.44 × 10 13 Jones, and a rapid response speed of 280 µs, positioning it at the pinnacle of 2D photodetector performance. The CuInP 2 Se 6 ’s ultralow, stable dark current paves the way for X-ray detection, achieving an unprecedented sensitivity of 1.32 × 10 5 µC Gy air −1 cm −2 and a low detection limit of 0.15 µGy air s −1 . Furthermore, 2D CuInP 2 Se 6 detector exhibits a remarkable image-sensing capability, adeptly capturing intricate patterns with high resolution. This discovery indicates its promise in revolutionizing integrated micro/nano optoelectronic devices, opening avenues for advancements in light and X-ray detection and imaging technologies.
研究领域:
材料科学
·
光学
·
医学成像
✓ 已验证
DOI
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2018
·Vol. 53
·期 9
·1800095
·
IF 1.122
Jingru Zhao,Ming Yang
Self-assembly represents an energy-efficient way toward the configurable design of functional nanomaterials. In this paper, triangular silver nanoplates are shown to spontaneously form anisotropic assemblies in the solution. Nanochains consisting of face-to-face aligned nanoplates can reach hundreds of nanometers long after the dispersion of triangular silver nanoplates is allowed to age at room temperature for 1 week. The preferred face-to-face attachment is attributed to the maximized van der Waals attraction for a thermodynamically stable configuration as opposed to side-by-side attachment. Time-dependent UV–vis spectra show a gradual blue-shift along with the increase of aging time, indicating a likely stepwise growth of nanochains. The peak shift is however found to be much smaller than the results of finite-difference time-domain simulations based on the same sized nanoplates with ideally concentric face-to-face placement. Such discrepancy may be attributed to the possible misalignment and size variations of stacking nanoplates.
研究领域:
纳米材料
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiaoshan Dong,Xiaochao Zhu,Fawei Lin,Beibei Yan,Jian Li,Guanyi Chen
Tar formation during biomass gasification reduces energy efficiency and poses a negative impact on downstream applications. A photothermal steam reforming (PTR) system based on LaMn x Ni 1-x O 3 (0 ≤ x ≤ 1) perovskite was developed to convert tar into combustible gas. The effects of Mn substitution, temperature, and the steam to carbon ratio on PTR activity were investigated. Mn substitution increased the content of surface adsorbed oxygen and maintained the perovskite structure of LaMn 0.4 Ni 0.6 O 3 (LM4N6). Moreover, LM4N6 showed improved optical absorption and electron-hole separation properties. LM4N6 presented 90 % carbon conversion during PTR at 400 °C. Due to the introduction of ultraviolet–visible light (UV–vis), LM4N6 obtained better catalytic activity and stability in PTR than in the thermal catalytic reforming process. Detailed characterization and experiments proved that UV–vis effectively activated Ni sites and the oxygen species on LM4N6 and formed a photothermal synergistic effect, which inhibited carbon deposition and improved catalytic activity and stability. This work provides a novel concept for the conversion and utilization of biomass tar at low temperatures.
研究领域:
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2018
·Vol. 29
·期 6
·981-988
·
IF 1.715
Liu ZhangSheng,Li LinNa
Coal cinder-supported TiO 2 photocatalysts were synthesized via a novel coal combustion method. As-obtained samples were characterized by XRD, SEM, EDS mapping, Raman spectra, FTIR and DRS, and their photocatalytic performances were evaluated by degradation of methylene blue (MB) and methyl orange (MO) under UV–Vis light illumination. The results revealed that mixed-phases TiO 2 with adjustable anatase–rutile ratio could be obtained by adjusting the amount of precursor tetrabutyl titanate, which was uniformly covered on the coal cinder. These coal cinder-supported TiO 2 photocatalysts exhibited commendable photocatalytic activity. Among them, the indexed CCT-7.5 sample presented the maximum of activity, which can be attributed to the optimal phase composition of TiO 2 . The present work provided a novel synthetic route to fabricate immobilized photocatalysts, which might be extended to the preparation of other functional materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 12
·3520-3526
·
IF 6.1
Qiuyuan Feng,Jialong Wang,Changyou Liu,Qun Jing,Xiaoyu Dong
Novel NaVSeO5 birefringent crystals were successfully synthesized using a multifunctional group synergistic strategy, which combines a two-dimensional layered structure consisting of stereochemically active lone pairs [SeO3] and anomalous [VO6] polyhedra. Polarization microscopy tests reveal that NaVSeO5 possesses significant birefringence (0.180@546 nm). Theoretical analysis suggests that this birefringence is attributed to the synergistic effect between highly distorted V–O polyhedra and stereochemically active lone pairs of Se4+. Based on UV-Vis-NIR diffuse reflectance analysis, the crystal NaVSeO5 demonstrates a cut-off edge below 336 nm. This study provides valuable insights for future exploration of novel birefringent crystal materials.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 24
·245709
·
IF 3.953
Ping Rong,Yi Liu,Shiyong Gao,Huiqing Lu,Shuai Ren,Lin Li,Xinzhi Ma,Qicheng Zhou,Junpei Chen,Jinzhong Wang
A novel CaIn2S4 with three-dimensional octahedral nano-blocks (ONBs) are successfully synthesized on fluorine-doped tin oxide (FTO) substrate by a simple hydrothermal method. The CaIn2S4 ONBs are uniform grown and scattered on the whole FTO substrate with high regular and symmetric morphology as well as average diagonal length of about 600 nm. Based on the as-synthesized CaIn2S4 ONBs, a photodetector (PD) is fabricated. Satisfyingly, it is found that the CaIn2S4 ONBs PD achieves a broad-band response ranging from ultraviolet (UV) to visible ( vis) light at zero bias voltage. It is also significant that the CaIn2S4 ONBs PD enables a fast response, in which the rise time and decay time are less than 0.15 and 0.2 s, respectively. Furthermore, the morphological evolution of the CaIn2S4 ONBs and plausible UV/vis detection mechanism of the CaIn2S4 ONBs PD are discussed.
研究领域:
材料科学
·
光电材料
·
纳米技术
✓ 已验证
DOI
高影响因子
WATER ENVIRONMENT RESEARCH
·
2019
·Vol. 92
·期 5
·713-721
·
IF 1.24
Yunhai Zhang,Shuangxi Zhou,Xin Su,Jimin Xu,Guangze Nie,Yongjun Zhang,Yide He,Shuili Yu
A p-type TiO 2 with Ti vacancies (D-TiO 2 ) was synthesized by a facile solvothermal treatment, and Ag/TiO 2 with different Ag loading amount was prepared through a photo-reduction deposition method. The samples were characterized through scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The adsorption and photocatalytic characteristics of tetrabromobisphenol A (TBBPA) on D-TiO 2 and Ag/TiO 2 were investigated. The adsorption of TBBPA on Ag/TiO 2 was significantly enhanced and was five times greater than that of pure TiO 2 . The increase in pH significantly inhibited the adsorption of TBBPA. The 2%-Ag/TiO 2 nearly completely degraded TBBPA in 10 min under UV–Vis light (λ > 360 nm), and the apparent reaction rate constant ( k app ) reached 0.63 min −1 . The significantly enhanced UV–Vis light catalytic properties of the Ag/TiO 2 in comparison with that of TiO 2 were attributed to the increased adsorption capacity and electron transfer ability of the Ag/TiO 2 . Free radical trap experiments results showed that holes and superoxide radicals play a major role in the catalytic degradation of TBBPA by Ag/TiO 2 . Moreover, the Ag/TiO 2 catalyst exhibits high stability during TBBPA degradation even after three cycles. Practitioner points Ti-defected TiO 2 and Ag/TiO 2 were synthesized using a solvothermal and photo-reduction deposition, respectively. Ag/TiO 2 exhibited outstanding adsorption and photocatalytic activity for TBBPA removal under UV–Vis light. Holes and superoxide radicals play a major role in the photocatalytic degradation of TBBPA.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROSCOPY LETTERS
·
2015
·
IF 0.852
Bo Zhang,Yanbin Su,Lei Chen,Zhuofu Wu,Fengrong Zhang,Yanwen Su,Gang Zhao,Zhengqiang Li
The characteristic changes in UV-visible and Raman spectra of lithocholic acid on E-2-Butenal for antiglioma are the maximum absorption peak of E-2-Butenal from 302 to 319 nm, the decreases of Raman signal of 1688 cm−1 and 1641 cm−1 in E-2-Butenal by lithocholic acid with the phenomenon of 1688 cm−1 splitting, and the disappearance of the band at 932 cm−1, which clearly displays the change of wagging in methyl. In the presence of mitochondrial protein deriving from glioma, the above mentioned effects of lithocholic acid on E-2-Butenal are more significant by Raman spectra detections. The molecular targets of lithocholic acid on E-2-Butenal are carbonyl group, conjugated double bonds, and methyl, respectively. The study concludes that the interaction between lithocholic acid and E-2-Butenal decreases the carbonyl group bond strength in E-2-Butenal and then changes the structure and function of E-2-Butenal. The internal cause of the interaction between lithocholic acid and E-2-Butenal leading to the change of the carbonyl group bond strength is the electronic delocalization near the carbonyl group bond in E-2-Butenal. Since E-2-Butenal derives from glioma in the process of lipid peroxidation of mitochondria, our investigation significantly contributes to understanding the mechanism of action of lithocholic acid as a potential antiglioma drug.
研究领域:
生物化学
·
药物学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Weixuan Zeng,Xianfeng Yang,Minghui Shang,Xiewen Xu,Weiyou Yang,Huilin Hou
The tailored doping levels towards the band gap tunability are one of the challenges to push forward the potential application of one-dimensional (1D) ZnO nanostructures in the opto/electric nanodevices . In present work, we reported the exploration of Mg-doped ZnO nanofibers via electrospinning of polyvinylpyrrolidone (PVP), Zn(CH 3 COO) 2 (ZnAc) and Mg(CH 3 COO) 2 (MgAc), followed by calcination in air. The resultant products were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscope (HRTEM), and X-ray photoelectron spectroscopy (XPS). The optical measurements (UV–vis) of the Mg-doped ZnO nanofibers suggested that the optical band gaps of the ZnO nanofibers could be tuned from 3.33 to 3.40 eV as a function of the Mg doing levels. This tunability of the band gap of ZnO nanofibers with an intentional impurity could eventually be useful for optoelectronic applications .
研究领域:
材料科学
·
光学工程
✓ 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）