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Biomimetic Ag/ZnO@PDMS Hybrid Nanorod Array-Mediated Photo-induced Enhanced Raman Spectroscopy Sensor for Quantitative and Visualized Analysis of Microplastics
Zhu, Zhengdong1; Han, Konghao1; Feng, Yating1; Li, Zhihao1; Zhang, Anxin1; Wang, Tao1; Zhang, Maofeng1; Zhang, Wei2
2023-07-19
摘要Microplastics are persistent pollutants that accumulatein theenvironment and can cause serious toxicity to mammals. At present,few technologies are able to quantitatively detect chemicals and providemorphological information simultaneously. Herein, we developed a dragonfly-wing-mimickingZnO nanorod array decorated with AgNPs on polydimethylsiloxane (PDMS)as a surface-enhanced Raman spectroscopy (SERS) and photo-inducedenhanced Raman spectroscopy (PIERS) substrate for trace analysis ofmicroplastics. The Ag/ZnO@PDMS hybrid nanorod array endows the sensorwith high sensitivity and signal repeatability (RSD & SIM; 5.89%),ensuring the reliable quantitative analysis of microplastics. Importantly,when the noble metal-semiconductor substrate was pre-radiatedwith ultraviolet light, a surprising PIERS was attained, achievingan additional enhancement of 11.3-fold higher than the normal SERSsignal. By combining the PIERS technology with the "coffeering effect", the sensor successfully discerned microplasticsof polyethylene (PE) and polystyrene (PS) at a trace level of 25 & mu;g/mLeven with a portable Raman device. It was capable of identifying PSmicrospheres in contaminated tap water, lake water, river water, andseawater with detection limits of 25, 28, 35, and 60 & mu;g/mL,respectively. The recovery rates of PS microspheres in four waterenvironments ranged from 94.8 to 102.4%, with the RSD ranging from2.40 to 6.81%. Moreover, quantitative and visualized detection ofmicroplastics was readily realized by our sensor. This portable PIERSsensor represents a significant step toward the generalizability andpracticality of quantitative and visual sensing technology.
关键词photo-induced enhanced Raman spectroscopy (PIERS) biomimeticsynthesis dragonfly wings microplastics visualized detection quantitative detection
DOI10.1021/acsami.3c06024
发表期刊ACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
卷号15期号:30页码:36988-36998
通讯作者Zhang, Maofeng(mfzhang@hfut.edu.cn) ; Zhang, Wei(zhangwei@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:001032168300001
语种英语