CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yuhong Zhang,Yanchang Liu,Junlong Liu,Zhihao Qu,Siye Tian,Hang Liu
Here, Ce-doped ZnO flower-like nanosheets are prepared by one-step hydrothermal method . The sensor based on Ce–ZnO composite exhibits excellent gas-sensing properties to acetone. Compared with pure ZnO, the response of Ce–ZnO composite is increased by 5.5 times, and the optimum operating temperature is reduced by 60 °C. The gas-sensing properties of the sensor to acetone under different humidity conditions are investigated. The redox reaction of Ce element increases the anti-humidity of Ce–ZnO sensor. Finally, the gas sensing mechanism of Ce–ZnO nanomaterial and anti-humidity principle are discussed in detail. The result can provide a new material for develop high sensitivity acetone sensor and a new anti-humidity strategy for designing gas sensing materials.
研究领域:
材料科学
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传感技术
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Tingting Chen,Yingjie Xu,Bin Chen,Huiquan Xiao
In this work, the efficient preparation of zeolitic imidazolate framework-8 (ZIF-8) from Zn 2+ and 2-methylimidazole (2-MI) promoted by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) was presented. The mechanism obtained from NMR, MS, DFT calculations, and conductivity shows that [DBUH][2-MI] ionic liquid formed in-situ from proton transfer between DBU and 2-MI can ionize 2-MI to [2-MI] - and form electrostatic interaction between Zn 2+ and [2-MI] - , resulting in the efficient self-assembly of Zn 2+ and 2-MI to form ZIF-8. Moreover, the effect of the amount of DBU on ZIF-8 indicates that too much DBU will cause excessive deprotonation of 2-MI, leading to agglomerate of ZIF-8. Accordingly, the optimal ratio to form ZIF-8 is n(DBU): n(2-MI): n(Zn 2+ ) = 2: 25: 1.25, which is also employed to prepare cerium-containing ZIF-8. Moreover, ZnO and Ce/ZnO nanomaterials are prepared by using ZIF-8 and cerium-containing ZIF-8 as precursors respectively, and their structure and morphology are characterized by XRD, FT-IR, SEM, and TEM. Interestingly, Ce content in Ce/ZnO obtained by EDS spectrum is basically consistent with the actual doping amount, indicating that DBU can effectively control the doping of Ce in ZIF-8. Finally, the photocatalytic degradation ability of ZnO and Ce/ZnO for Rhodamine B under visible light and sunlight is investigated in detail.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2021
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IF 8.198
Jean Claude Munyemana,Jia Chen,Yun Liu,Yongpeng Wang,Hongdeng Qiu
This work demonstrates a simple and versatile deep eutectic solvent (DES)-assisted synthesis of bullet-shaped cerium–zinc oxide (Ce–ZnO) and sheet-like cerium–zinc hydroxide nitrate (Ce–Zn5(OH)8(NO3)2·2H2O). DES could serve not only as a green solvent but also as a superior template to produce these two different hierarchically shaped materials. Interestingly, Ce–ZnO shows catalytic activity toward polymerization of dopamine to initially pink color quinone derivatives with the visible light absorption at 475 nm and finally to blue-emitting polydopamine with highest fluorescence intensity at 480 nm. The catalytic activity of Ce–ZnO can be selectively inhibited by pyrophosphate ions (PPi), which leads to a decrease in the absorbance intensity or fluorescence emission. PPi detection strategies were established, and the linearity was achieved from 0.5 to 100 μM with a low detection limit of 0.05 μM for the fluorometric detection, while the linear detection was 0.5–150 μM and the low detection limit was 0.19 μM for colorimetric detection. This work offers a new opportunity to produce Ce–ZnO and Ce–Zn5(OH)8(NO3)2·2H2O using an inexpensive and eco-friendly solvent, and provides a useful way of detecting PPi. Hence, from these findings, the proposed synthesis strategy is expected to serve as a novel green strategy for preparing hierarchically shaped materials.
研究领域:
材料科学
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分析化学
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环境化学
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纳米技术
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
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IF 6
Chuan Luo,Zining Wang,Tianxiang Xia,Zhengang Zhao
The escalating emissions of nitrogen dioxide (NO 2 ) resulting from rapid industrialization pose a severe threat to both ecological balance and public health, rendering the development of high-performance NO 2 sensors imperative for precise environmental monitoring. However, conventional metal oxide semiconductor (MOS) sensors based on pristine materials suffer from intrinsic limitations, including low sensitivity, poor humidity tolerance, and high operating temperatures. Single-mode modification strategies often fail to simultaneously mitigate these drawbacks. Herein, we propose a synergistic modification strategy combining rare-earth doping with heterojunction engineering. Ce-doped SnO 2 /ZnO nanocomposites were successfully synthesized via a facile hydrothermal method. Among the fabricated devices, the S 5 CZ 5 sensor (1:1 mass ratio) exhibited superior performance, delivering a robust response of 55.3 to 100 ppm NO 2 at 180 °C, accompanied by rapid response/recovery kinetics (21 s/29 s) and a low theoretical detection limit of 843 ppb. Notably, the incorporation of Ce effectively modulated surface wettability, endowing the sensor with exceptional moisture resistance and long-term stability. Furthermore, density functional theory (DFT) calculations elucidated the atomic-scale mechanism: the ternary SnO 2 /Ce-ZnO system yields an exceptionally high NO 2 adsorption energy (−2.55 eV) and a massive interfacial charge transfer (0.49 e), while critically suppressing H 2 O interactions (adsorption energy of −0.40 eV, restricted charge transfer of 0.13 e), as corroborated by charge density difference analyses. Coupled with an optimized density of states near the Fermi level, this work achieves a multidimensional enhancement of sensing performance, offering novel insights for trace gas detection in complex environments.
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DOI
高影响因子
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