ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Tianxiang Sun,Shengdan Xie,Ning Li,Xiaomei Jiang,Xiao Cheng,Yucheng Liu,Xutang Tao,Shengzhong (Frank) Liu,Zhaolai Chen
Metal halide perovskite single crystals are promising for hard X-ray detection, but growth of large-sized thin single crystals and inhibition of halide ion migration under high bias are challenging. Herein, the preparation of dense stacking of oriented millimeter-sized perovskite single crystals with capability of large-area fabrication, controlled thickness, and high ion migration activation energy ( E a)is reported. The oriented growth results in absence of grain boundaries parallel with the substrates, leading to large carrier mobility-lifetime ( µτ ) product of 2.7 × 10 −3 cm 2 V −1 , which is comparable to values of many perovskite bulk single crystals. Under low bias, hard X-ray detectors exhibit high sensitivity of 1.2 × 10 4 µC Gy −1 cm −2 and low detection limit of 87.5 nGy s −1 , which are comparable to those of many single-crystal hard X-ray detectors under high bias. Moreover, combination of low bias and high E a results in weak halide ion migration and small dark current drift of 3.2 × 10 −4 nA cm −1 s −1 v −1 . Benefited from the superior detector performance, high-contrast hard X-ray imaging can be obtained at a low dose rate of 1.26 µGy s −1 . The work may promote the application of perovskite hard X-ray detectors in practical imaging area.
研究领域:
材料科学
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物理学
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辐射探测技术
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
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2025
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IF 6.4
Yujie Wang,Ziqi Zhong,Guowu Zhan,Jingran Xiao
Molybdenum (Mo) doping has been recognized as an effective strategy to enhance the low-bias performance of hematite (Fe2O3) photoanodes in photoelectrochemical (PEC) water splitting. This study develops a mild hydrothermal strategy for incorporating Mo into Fe2O3 photoanodes, forming a Mo–O–Fe surface layer while avoiding the morphological degradation associated with conventional calcination. Although this modification enhances bulk charge separation and surface charge injection, the resulting Mo–O–Fe interface suppresses the functionality of directly deposited FeNi oxyhydroxide cocatalysts, yielding limited performance gains. To overcome this limitation, a hydroxyethylidene diphosphonic acid (HEDP) interlayer is introduced, which enables synergistic cooperation among the three components. It is plausible that HEDP acts as a hole-transfer mediator, shuttling holes from Mo–O–Fe surface states to the FeNi cocatalyst. The optimized FeNi/HEDP/Mo-Fe2O3 photoanode achieves a notable photocurrent density of 1.26 mA cm−2 at a low bias of 0.90 V vs. RHE and an onset potential of 0.59 V vs. RHE. The synergistic combination of mild hydrothermal doping and molecular interfacial engineering presented here provides a conceptual blueprint for the rational design of photoelectrodes, highlighting the critical need to manage interfacial charge dynamics to achieve high efficiency in the low-bias regime.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Ling Cheng,Xianglong Yang,Xiaomei Chen,Chunling Lv,Jin Mao,Qi Zhang,Peiwu Li
A surface oxygen vacancy-engineered WO 3-x film with enhanced photoelectrocatalytic (PEC) activity for the detoxification of deoxynivalenol (DON) was successfully synthesized via an improved sol-gel method. The presence of oxygen vacancy was verified by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectra and electron spin resonance spectroscopy. The introduction of oxygen vacancy into WO 3-x film substantially enhanced its absorption in visible region, and facilitated its transfer and separation of photogenerated charges. This made the WO 3-x film to have excellent PEC activity for the detoxification of DON under visible light illumination at a low bias of +0.3 V. The percentage of DON removed was up to 86.4 % after being treated with PEC for 2 h. When the bias potential applied was further increased, there were no obvious changes in the degradation efficiency of the film. The cell viabilities were dramatically enhanced with prolonged time, which were over 95 % after 2 h PEC treatment compared to the control. Through the analysis of eight intermediates that were separated and identified by high performance liquid chromatography-mass spectrometry, it can be concluded that the reduction of DON and the cleavage of double bond at C9 C10, epoxy group at C12 13 and hydroxyl group at C3 in DON could greatly reduce the toxicity, and the detoxification mechanism of this PEC system was proposed. This work can provide further insights into DON detoxification using PEC system with low bias.
研究领域:
环境科学
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材料科学
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毒理学
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分析化学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Qiaoting Yang,Junhao Deng,Dunru Zhu,Fei Yu,Yi-Xuan Li,Jérome Chauvin,Xue-Ji Zhang,Serge Cosnier,Dan Shan
Electrochemiluminescence (ECL) platforms are often constrained by aggregation-caused quenching (ACQ), inefficient charge transfer, and instability under high driving potentials, thereby limiting their sensitivity and reproducibility. Herein, an energy-level rule-guided strategy is reported to construct a distinctive lanthanide-organic framework (LnOF), [Tb 2 ( µ 2 -OH) 2 (TBAPy)], through the controlled self-assembly of Tb 3+ and 4,4′,4″,4‴-(pyrene-1,3,6,8-tetrayl)tetrabenzoic acid (H 4 TBAPy). This LnOF features the rod-shaped [Tb( µ 2 -OH) 2 (-CO 2 ) 2 ] chains, a large π -stacking distance (6.685 Å) between pyrene rings, and a 3D sea topology, effectively suppressing ACQ and antenna-type energy transfer from the TBAPy triplet state to Tb 3+ , thereby preserving pyrene-based fluorescence while inhibiting the luminescence of Tb 3+ . Importantly, the low-coordinated [TbO 6 ] octahedron exposes multiple open metal sites to coordinate with coreactant S 2 O 8 2− and facilitate its decomposition to SO 4 •− radicals during electrochemical reactions. This process markedly reduces interfacial resistance and enables robust low-bias ECL amplification. Furthermore, a MnO 2 interfacial gate enables ratiometric ECL OFF/ON switching upon glutathione reduction, delivering internally referenced signal outputs with an ultralow limit of detection of 6.8 × 10 −4 n m across a wide range (0.01–500 n m ). This kind of functional material design establishes a generalizable blueprint for LnOF-based ECL systems, advancing programmable and low-bias luminescent sensing with exceptional sensitivity and stability.
研究领域:
材料科学
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分析化学
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电化学
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发光材料
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传感器设计
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纳米技术
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产品关联
DOI
高影响因子
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