ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 38
·1904416
·
IF 15.621
Huai Yang,Longfei Pan,Xiaoting Wang,Hui-Xiong Deng,Mianzeng Zhong,Ziqi Zhou,Zheng Lou,Guozhen Shen,Zhongming Wei
Mixed-valence states can bring unexpected unique phenomena, especially novel anisotropic physics, due to structural asymmetry, which originate from the discrepant distribution of atoms with different valence. This study reports an unexploited mixed-valence-driven quasi-1D Sn II Sn IV S 3 crystal, which exhibits widely and distinctively anisotropic polarized-light absorption reaching ≈3.4 from the deep ultraviolet to near-infrared region (250–850 nm). The fabricated polarization-sensitive photodetectors based on highly air-stable Sn II Sn IV S 3 nanowires display strong linear dichroism among the UV–vis–NIR spectrum with responsivity exceeding ≈150 A W −1 . Furthermore, the devices are further constructed onto a flexible polyethylene terephthalate (PET) substrate and the photoresponse remains roughly unchanged after repeated bending. This work based on novel mixed-valence-driven quasi-1D ternary sulfide Sn II Sn IV S 3 excites interest in low-symmetry semiconductors for developing broadly spectral polarization-sensitive photodetectors with environmental stability and mechanical flexibility.
研究领域:
材料科学
·
半导体物理
·
纳米光学
·
光电子学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Xue-Mei Dong,Chen Chen,Yin-Xiang Li,Hong-Chao Sun,Bin Liu,Zi-Fan Li,Kai-Li Wang,Zi-Xi He,Meng-Na Yu,Wei Huang,Ju-Qing Liu
Neuromorphic vision sensors capable of multispectral perception and efficient recognition are highly desirable for bioretina emulation, but their realization is challenging. Here, we present a cocrystal strategy for preparing an organic nanowire retinamorphic vision sensor with UV–vis–NIR perception and fast recognition. By leveraging molecular-scale donor–acceptor interpenetration and charge-transfer interfaces, the cocrystal nanowire device exhibits ultrawide photoperception ranging from 350 to 1050 nm, fast photoresponse of 150 ms, high specific detectivity of 8.2 × 1012 Jones, and responsivity of 15 A W–1, as well as retina-like photosynaptic plasticity behaviors. Utilizing the sensor nerve and convolutional neural network, the architecture achieves 90% accuracy in recognizing colorful images. The cocrystal design offers an effective method for constructing nanowire photosynases with high performance in artificial visual systems.
研究领域:
材料科学
·
神经形态工程
·
光电传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Hui Xu,Yunfang Huang,Dan Luo,Xiaomin Yang,Shao Jin,Qiyao Guo,Yuezhu Zhao,Yu Fang,Yuelin Wei,Jihuai Wu
In this work, multiple heterojunction Ag/Bi/BiOCl 0.8 Br 0.2 photocatalysts with novel porous micro-flower structure were fabricated via a facile one-step solvothermal route and characterized systematically. The TEM and HRTEM images clearly showed the heterogeneous nanostructures at the interface between Ag/Bi and BiOCl 0.8 Br 0.2 . The as-prepared Ag/Bi/BiOCl 0.8 Br 0.2 composites displayed a strong optical absorption in the region of 250–1500 nm, especially in the unexploited near infrared region which accounts for most of the sunlight. The multiple heterojunction photocatalyst exhibited an outstanding photocatalytic activity for the degradation of Rhodamine B under the UV, visible and NIR light irradiation, respectively. The highly enhanced photocatalytic activity was attributed to the synergistic effects, including the reduced band gap, the surface plasmon resonance effect, efficient charge separation of photo-generated electron-holes. On the basis of the radical species trapping experiments, the holes and superoxide radicals were confirmed to be the mainly active species involved in the degradation of Rhodamine B under the NIR light irradiation. This study provides a novel strategy for designing highly performance plasmonic photocatalysts under the whole solar light irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Computational and Theoretical Chemistry
·
2021
·
IF 1.926
Jianqiang Zhao,Yue Zhang,Lihua Gan,Guanlei Wang
Here, we combined experimental measurements and DFT calculations to study UV–vis absorption spectra. DFT calculations of azobenzene and its derivatives proved useful for estimation of experimental spectra with near one-to-one correspondence. Calculation results show that substituents have no obvious effect on the coplanarity of benzene rings and N N bond. Potential energy surfaces were calculated for DHA and DEA. In the ground state, the inversion pathway was found to be preferred. A conical intersection was found between the ground and first excited states along the rotation pathway, indicating that the rotation mechanism is favored in the first excited state for DHA and DEA. UV–vis spectra of DHA and DEA were calculated by TD-DFT. Compared with azobenzene, the calculated wavelength of maximum absorption of DHA- trans and DEA- trans has red shift in UV–vis absorption spectra, which are in reasonable agreement with the experimental data.
研究领域:
化学
·
光化学
·
理论计算
✓ 已验证
产品关联
DOI
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
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 11
·5330-5337
·
IF 3.3
Yu Wang,Rao Chen,Dongmei Liu,Chaofei Peng,Junwei Wang,Xiaoqing Dong
The development of effective Vis-sensitive photoinitiators for light-emitting diode (LED) polymerization is still an emerging challenge as LEDs are being developed into the predominant light sources. In this work, a series of new functionalized photoinitiators, containing thioxanthones and oxime-esters as functional groups, was designed and straightforwardly synthesized in two steps. The structures of the photoinitiators were studied using 1H NMR, 13C NMR, and high-resolution mass spectrometry. The conclusion of the photophysical properties indicated that the long wavelength absorptions from 360 nm to 405 nm made the investigated thioxanthone derivatives quite appealing as a valuable photoinitiator under UV-Vis LEDs. The structure–reactivity relationship was also studied in detail through real-time FTIR spectroscopy. A possible photolysis mechanism was expected based on further photolysis and online 1H NMR activities. With a proper molecular design, the new functionalized photoinitiators were synthesised straightforwardly and they displayed more advanced initiation abilities than their parent thioxanthone.
研究领域:
材料化学
·
光化学
·
有机合成
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Chenyao Yuan,Jiayan Pu,Donglei Fu,Yuru Min,Lei Wang,Jingquan Liu
Formaldehyde is deemed to be an indispensable industrial product that has been widely applied in manufacture of resins, drugs, building materials, etc. It has been widely accepted that, nevertheless, residual formaldehyde will cause pathogen reactions, even leading to cancers like leukemia. Thus, a facile and efficient approach has been designed to achieve the determination of formaldehyde by ultraviolet and visible (UV–vis) spectrophotometry in liquid media. In detail, O-(carboxymethyl) hydroxylamine (C 2 H 5 NO 3 ·0.5HCl) is chosen as the detection reagent for the specific recognition of formaldehyde on account of its unique aminooxy (-O-NH 2 ) which can react with formaldehyde to form oxime bonds (O-N CH 2 ), accompanied with the only by-product of H 2 O. Likewise, this simple and sensitive detection approach based on the chemical detection reagent C 2 H 5 NO 3 ·0.5HCl can also be applied to the determination of other aldehyde homologs with carbonyl groups including acetaldehyde, acetone, benzaldehyde, 1, 4-phthalaldehyde. As a result, all the UV absorbances of analytes display remarkable linear detection relationships. The limits of detection (LOD) and limits of quantitation (LOQ) values are in the range of 0.03–1.16 ppm and 0.03–5.81 ppm respectively, with RSDs of 3.27–3.75 %, evidencing the feasibility of our method to determine formaldehyde and its homologs by UV–vis spectrophotometry and auspicious prospects of practical applications.
研究领域:
分析化学
·
环境科学
·
医学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Jincai Peng,Yuehong Peng,Tianhui Wang,Zhijie Wu,Qi Wang,Yongjin Li,Zhaoyi Yin,Jin Han,Jianbei Qiu,Zhengwen Yang,Zhiguo Song
In order to make the most of solar energy, the development of efficient UV–Vis–NIR activated photocatalysts has attracted more and more attention. In this study, the UV–Vis–NIR broad spectrum activated photocatalysts La-doped BaBiO 2 Cl with abundant oxygen vacancies (OVs) were successfully prepared by solid state reaction . The experimental results and theoretical calculations revealed that La doping induced OVs in BaBiO 2 Cl, formed an intermediate level, extended the light absorption to the NIR region, and promoted carrier separation efficiency. Owing to the synergistic promotion effect, the optimal BaBiO 2 Cl–3%La exhibited obviously enhanced photodegradation rate, which was about 3.26 times higher than that of pure BaBiO 2 Cl under UV–Vis–NIR light irradiation . This work provides a resultful strategy for designing new full-spectrum-activated photocatalysts for environmental protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Duoduo Zhang,Xinyu Zhang,Mingshuang Liang,Xiuxiu Li,Nan Wang,Heping Xiao,Dawei Cao,Xiubo Zhao
Escherichia coli ( E. coli ) is one of the most prevalent foodborne pathogens, releasing toxic substances and causing infectious and life-threatening diseases. Thus, the rapid and sensitive detection of E. coli is essential for safeguarding human health. Herein, a ratiometric colorimetric sensor was constructed for detecting E. coli , utilizing the coordination between zirconium (Zr)-tetraphenylporphyrin tetrasulfonic acid (TPPS) hydrate metal–organic frameworks (Zr-TMs) and copper ions (Cu 2+ ). E. coli can capture and convert external Cu 2+ into Cu + through its distinctive metabolic activities. This capability further enhances the coordination interaction between the porphyrin ligands in Zr-TMs and the metal ions. As a result, the ultraviolet–visible (UV–vis) absorption spectral properties of Zr-TMs changed, exhibiting an enhanced absorption peak at 413 nm (A 413 ) and a weakened peak at 434 nm (A 434 ). By monitoring the increase in ratio of A 413 to A 434 , this sensor achieved rapid and sensitive detection of E. coli at concentrations ranging from 10 2 to 10 7 CFU/mL within 63 min, with a detection limit of 19 CFU/mL. The color of the solution gradually changed from green to colorless. This proposed ratiometric method utilized the opposite changes in the two UV–vis absorption peak signals (A 413 and A 434 ) generated by the Zr-TMs probes, improving detection accuracy and achieving visual analysis. Additionally, this method accurately identified E. coli in milk samples, demonstrating substantial potential for detecting pathogenic bacteria in food.
研究领域:
食品安全检测
·
微生物学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei Zhou,Wenwei Zhang,Xueqin Ma,Haichen Lai,Xingguang Zhang
Metal-zeolites catalysts are of great importance in selective organic conversions. Zeolites possess features of highly-ordered porous network, adjustable acidic properties (Brønsted/Lewis), spatial nanoconfinement effects, unique shape selectivity and the strong (hydrothermal-) stability. The role of zeolite hydroxyl (z-OH) groups, such as bridging ones in Si-O(H)-Al (B acids) and terminal ones in Al-OH and Si-OH (silanols), in catalysis is an interesting topic, particularly when they are not catalytic active sites, while they affect the catalytic performances. This study comprehensively investigated series of Au/USY catalysts in the selective oxidation of benzyl alcohol to benzaldehyde and clarified the dominating contributions of Al-associated z-OH groups to affecting catalytic conversions and selectivity via altering the Si/Al ratio and reducing z-OH groups by amorphous silica species derived from diethoxydimethylsilane under high-temperature calcination. The catalysts were characterized by XRD, BET, TEM, XPS, UV/Vis, FT-IR and in-situ DRIFT to investigate crystal structures, textural properties, morphologies, size distribution, chemical state of gold, acidity, and adsorptive properties. The experimental results proved that zeolites with a higher amount of z-OH groups tuned by Si/Al ratios or by diethoxydimethylsilane silylation exhibited higher catalytic activity because of the adsorption effect. Finally, a possible mechanism was discussed based on the experimental results and literature.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Cheng Cheng,Jian Wang,Zhihao Zhao,Changchun Chen,Sheng Cui,Yifeng Wang,Lin Pan,Yaru Ni,Chunhua Lu
Semiconductor catalyst with high photocatalytic activity can be exploited via heterojunction. In this study, a new S-scheme SrTiO 3 /porous ZnO composite was rationally devised, successfully prepared by utilizing a two-step pyrolysis of SrTiO 3 /ZIF-8, and analyzed by various characterization technologies including XRD, SEM, TEM, BET, XPS, PL, UV–vis DRS, and photoelectrochemical and DFT theoretical calculations. A porous structure, tight contact, and a heterojunction formed between SrTiO 3 and porous ZnO (ZnOT) can be observed by SEM and TEM images. BET testing indicates that the SrTiO 3 /porous ZnO composite (S3ZT) shows the highest specific surface area (30.37 m 2 /g). The band gap values (E g ) of SrTiO 3 and ZnOT are around 3.17 and 2.95 eV, which agree with those obtained from DFT calculations. Compared to other samples, the SrTiO 3 /porous ZnO composite (S3ZT) shows higher light absorption and lower transfer resistance as demonstrated by UV–vis DRS and EIS results. S3ZT presents a superior photocatalytic efficiency of 48.8% in degrading 5 mg/L methyl orange (MO) irradiated by 1 h UV–vis light, which are 7- and 1.5-fold higher than pristine SrTiO 3 and ZnOT, respectively. Moreover, based on Mott-Schottky theory, active species trapping experiments, XPS determination, and DFT calculations (energy band gap and work function), it was shown to be reasonable to utilize the S-scheme charge migration process for an explanation regarding the better photocatalytic activity of SrTiO 3 /porous ZnO composite. Overall, this work will provide an effective protocol for devising and preparing semiconductor photocatalysts with S-scheme heterojunction by utilizing the superior characteristics of MOFs.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 10
·1900023
·
IF 7.125
Liang Chen,Wei Tian,Liangliang Min,Fengren Cao,Liang Li
Designing Si nanowire-based heterostructures provides a promising path to construct self-driven and broadband photodetectors, which are the key components for optoelectronic systems. Herein, the first fabrication of a p-CuIn 0.7 Ga 0.3 Se 2 nanoparticles/n-Si nanowire array core–shell structure through a simple two-stage process—spin coating and selenization treatment—and its integration into a self-driven photodetector are reported. The heterojunction photodetector is sensitive to broad wavelength range from UV light to visible and near-infrared light, with high detectivity of up to 1.6 × 10 13 Jones, large responsivity of 0.33 A W −1 , and an ultrafast response speed of 823/356 µs at zero bias. Additionally, this core–shell nanostructure exhibits good air stability and strong ability to detect weak light sources such as fluorescent lamp and lighter. The superior performance can be attributed to the strong light absorption of both Si and CuIn 0.7 Ga 0.3 Se 2 , the unique vertically standing core–shell structure, and effective photogenerated carriers' separation and transportation at the heterojunction interface.
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）