科研之友
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摘要
NH2-MIL-53(Al) nanorods studded with F- were successfully synthesized via coordination modulation with HF as a modulator. The investigation of the growth mechanism pointed out that F- plays a key role in the formation process. The incorporation of F- into the framework of NH2-MIL-53(Al) not only made the crystal morphology tunable but also magnified the fluorescence enhancement performance of NH2-MIL-53(Al) in water vapor, based on which a highly efficient humidity sensor was fabricated. Among different kinds of humidity sensors, the present sensing system stood out due to its fast response rate, good sensitivity and high selectivity with a low detection limit of 0.6 mu g mL(-1) (S/N = 3) and a wide detection range from 4 to 40 mu g mL(-1). On the other hand, a majority of the conventional electronic humidity sensors seriously suffered from temperature dependence, while the present sensing system got over this disadvantage. Therefore, the NH2-MIL-53(Al) nanorod layer-based fluorescence sensing system has the potential for application in the real-time monitoring of humidity under ambient conditions.
- 出版日期2017-9-28
- 单位四川大学
