Environmental Science-Nano
·
2024
·Vol. 11
·期 7
·3162-3177
·
IF 5.8
Ningning Xing,Yangsai Lyu,Weilin Zhao,Ziwei Lan,Min Zuo,Jia Li
Studies on combining the catalytic activity of nanomaterials with self-propelled micro/nanomotors for determining and degrading contaminants in the water environment are rapidly growing, especially in constructing cost-effective platforms that can simultaneously achieve both functions. Herein, we report a novel bifunctional magnetic micromotor (CA-MnO2@Co–N/C) with greatly enhanced micromixing performance, as well as improved detection and degradation capabilities for aniline in water. The CA-MnO2@Co–N/C micromotors were composed of a bioderived carbon matrix, ZIF-67-derived magnetic Co–N/C, and MnO2 nanosheets. The micromotors not only exhibited excellent peroxidase-like activity (POD-like activity) but also showed superior Fenton-like catalytic activity. The micromotors achieved self-propulsion motion by generating O2 bubbles from the catalytic decomposition of H2O2, with the highest speed of 398.88 μm s−1 in 7 wt% H2O2. The CA-MnO2@Co–N/C micromotors exhibited sensitive detection and efficient removal toward aniline in water, which was attributed to the synergistic effect between hierarchical structure, citric acid modification and bubble-driven propulsion. The limit of detection (LOD) for aniline was 0.185 μM, and the highest removal efficiency of aniline reached 83% in 180 min based on our dynamic catalytic reaction platform. In comparison to traditional micro/nanomaterials, the simple fabrication process, self-propulsion performance, and excellent catalytic activity of CA-MnO2@Co–N/C micromotors provided a promising strategy for a dynamic environmental monitoring and remediation platform.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 8
·1070-1076
·
IF 0
Fu Shang,Zhang Hongguang,Wang Guowei,Wang Meng,Wang Yu,Xia Cunhui
We successfully obtained ∝-Fe2O3 microspheres with a ca. 500 nm diameter through solvothermal method and subsequent annealing at 300 °C for 2 h in air. The composition and morphology of the samples were analyzed by FT-IR, XRD, SEM, TEM, TG and BET.
The gas sensitivity measurements indicated that the sensor of ∝-Fe2O3 microspheres showed good selectivity and high response to aniline gas. This sensor showed a response to aniline gas as low as 0.01 ppm, and the response achieved 12.5 at 150 °C to 10
ppm aniline. The enhanced gas sensing properties were due to enough pore architectures of the sample. These results demonstrated that the samples have a good application prospect in preparation of high-performance gas sensors.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 33
·期 1
·458-467
·
IF 2.478
Dong Hua-Dong,Zhao Jian-Ping,Peng Ming-Xing,Zhang Yong-Hui
The Schottky barrier at the interface between the semiconductor phase and the metal phase has excellent rectification effect which can greatly facilitate the formation of the electron accumulation region. The interface electronic modulation can promote the formation of electron depletion layer in the gas sensing process, which is a powerful strategy to improve the sensing performance. In this work, ZnO–TiC composites were successfully prepared. XRD, TEM, BET and XPS characterizations of the ZnO–TiC composites were proformed to investigate the compositions and structures. The as-synthesized samples were applied to fabricate gas sensors to investigate their gas sensing performance. Compared to pure ZnO and TiC, the composites achieved high sensitivity (232 for 100 ppm aniline) and linear detection ( R 2 = 0.986) of aniline. The improvement of sensor performance is mainly attributed to the electronic modulation of Schottky barrier at the interface between ZnO and TiC. Our results indicate that the construction of ZnO-TiC Schottky barrier is a promising strategy for enhancing the performance of gas sensors.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 4
·541
·
IF 4.7
Yun Liu,Wen-Zhen Wang,Zhi-Ping Zhang,Chun-Bao Du,Lei-Lei Li,Chen Zhao,Hong-Jiu Li,Qing Huang
Aniline compounds, as a class of widely used but highly toxic chemical raw materials, are increasingly being released and accumulated in the environment, posing serious threats to environmental safety and human health. Therefore, developing detection methods for aniline compounds is of particular significance. Herein, we synthesized the fluorescent third monomer cyano-stilbene epoxide M and ternary copolymerized it with carbon dioxide (CO2) and propylene oxide (PO) to synthesize carbon dioxide-based polycarbonate (PPCM) with fluorescence recognition functions, as well as excellent performance, for the first time. The results revealed that the PPCM fluorescent probe exhibited typical aggregation-induced luminescence properties and could be quenched by aniline compounds. The probe presented anti-interference-specific selectivity for aniline compounds, and the detection limit was 1.69 × 10−4M. Moreover, it was found to be a highly sensitive aniline detection probe. At the same time, the aniline biomarker p-aminophenol in urine could also be detected, which could expand the potential applications of polymers in the fluorescence-sensing field.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Li Liu,Ran Cen,Zhiyou Xiao,Zhu Tao,Xin Xiao
Nitroaniline (NA), specifically p-Nitroaniline (p-NA), is a toxic and poorly biodegradable compound that poses significant risks to the environment and human health. Therefore, the development of an efficient method for detecting p-NA is paramount. In this study, blue fluorescent carbon dots, Q[6]-CDs and Q[7]-CDs, were synthesized using cucurbit[ n ]uril (Q[ n ]) and mercaptosuccinic acid (MSA), exhibiting remarkable abilities to differentiate NA isomers and visually detect p-NA. By leveraging the internal filter effect (IFE) and electron transfer (ET) quenching mechanism, Q[7]-CDs achieved rapid and sensitive detection of p-NA with a limit of detection (LOD) as low as 0.61 µM. Furthermore, a supramolecular fluorescent array sensor utilizing these CDs successfully discriminated between NA isomers. Additionally, Q[7]-CDs were integrated with a smartphone to create a portable fluorescent sensing platform for visual detection of p-NA in water samples, achieving a LOD of 1.76 µM. When applied to the detection of p-NA in tap water and river water, spiked recoveries ranged from 102.8 % to 110.0 % and 103.0 % to 110.9 %, respectively. The sensors demonstrated high sensitivity, robustness against interference, and simplicity in application, indicating their potential for use in environmental monitoring.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Jing-Yi Cao,Ze-Dong Yu,Guang Yang,Xue-Can Wang,Lu Jiang,Xi Wang,Wen-Xuan Zhao,Shu-Hai Chen,Carl Redshaw,Chuan-Zeng Wang,Takehiko Yamato
In recent years, fluorescence sensors have been widely used in explosive detection due to their portability and high efficiency. In the present work, two K-region tetrasubstituted deep-blue pyrene-based luminogens were designed and synthesized by introducing electron-donating groups. The optical properties were investigated by experimental and density functional theory (DFT) methods. Reasonable luminescence efficiency and electron rich characteristic allowed for the possible detection of nitro-explosives. Both luminogens, especially TFPy , exhibit a sensitive response towards nitroanilines ( NA ), with a limit of detection (LOD) for p -NA as low as 2.75 × 10 –8 M, which is mainly attributed to the electron-donating substituents on the periphery of the pyrene core and the extended π-conjugated structure. These research results establish a low-cost and simple strategy for the detection of trace nitroaniline.
研究领域:
化学传感器
·
材料科学
·
环境监测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）