A dual ammonia-responsive sponge sensor: preparation, transition mechanism and sensitivity
Jiahong Guo; Jikui Wang; Zhiwei Bai; Yonglei Lyu; Qiang Wang
A dual ammonia-responsive sponge sensor: preparation, transition mechanism and sensitivity
Jiahong Guo
Jikui Wang
Zhiwei Bai
Yonglei Lyu
Qiang Wang
ROYAL SOC CHEMISTRY
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042719455
https://urn.fi/URN:NBN:fi-fe2021042719455
Tiivistelmä
PDMS-PU (polydimethylsiloxane-polyurethane) sponge decorated with In(OH)(3) (indium hydroxide) and BCP (bromocresol purple) particles is shown to be a room-temperature ammonia sensor with high sensitivity and excellent reproducibility; it can accomplish real-time detection and monitoring of ammonia in the surrounding environment. The superhydrophobic and yellowish In(OH)(3)-BCP-TiO2-based ammoniaresponsive (IBT-AR) sponge changes to a purple superhydrophilic one when exposed to ammonia. Notably, after reacting with ammonia, the sponge can recover its original wettability and color after heating in air. The wettability, color and absorption signal of IBT-AR sponge have been measured for sensing ammonia using the water contact angle, macroscopic observation and UV-vis absorption spectrometry, respectively. The minimum ammonia concentrations that can be detected by the sponge wettability, color and absorption signal are 0.5%, 1.4 ppm and 50 ppb, respectively. This kind of sponge with smart wettability and color is a promising new ammonia detector.
Kokoelmat
- Rinnakkaistallenteet [19207]