What is it about?
In this work, we have utilized nanoparticles of ZnO and Fe-doped ZnO as a sensor to detect Brilliant Green Dye. In addition, the nanoparticles are also used to photo-catalytically degrade the dye with almost 100 % efficiency. Brilliant Green (BG) is a synthetic cationic triphenylmethane dye used for a variety of applications such as biological staining, veterinary medicine, dermatological agents, intestinal parasites, and fungus inhibitors in chicken feed. It is extensively used in textile dyeing and printing. It induces gastrointestinal irritation, with symptoms such as vomiting, nausea, and diarrhea. In this regard, it is obligatory to develop techniques for BG detection in water bodies and for transforming them into harmless byproducts via an economical, efficient, and greener method. Various approaches have been employed for the quantitative analysis of dyes and their products. However, their complicated apparatus, lower sensitivity, and prolonged processing time make them inappropriate for in situ examination. Electrochemical sensors, owing to their ease of use, low cost, and impressive detection limits, have gained interest in this regard. In the current study, BG was electrochemically detected using the developed sensor made of a glassy carbon electrode (GCE) modified with Fe–ZnO NPs and MWCNTs. Fe–ZnO NPs were employed for the photocatalytic degradation of BG.
Featured Image
Photo by Dan Hadar on Unsplash
Why is it important?
Brilliant Green dye was electrochemically detected using the developed sensor made of a glassy carbon electrode (GCE) modified with Fe−ZnO NPs and MWCNTs. In the current work, we have beaten this challenge by getting quite a lower limit of detection for dye by adopting a smart approach of skipping the diffusion step of molecules through the solution. In our devised droplet analysis approach, dyes can be detected up to the nanomolar concentration level. Unlike conventional methods of taking the analyte in a solution, the droplet analysis method requires only a small amount of the analyte for analysis. Hence, this smart approach significantly nullifies the orientation barrier of bulky dye molecules toward the electrode surface. Moreover, this approach eradicates the demand for a large number of analytes,
Perspectives
More work can be done in the future for the simultaneous detection and degradation of various dyes. Other doped semiconductors in conjunction with MWCNTs, COOH-MWCNTs, NH2-MWCNTs or graphene oxide can be tested for sensing and degradation of brilliant green and other dyes
Dr Afzal Shah
Quaid-i-Azam University, Iislamabad
Read the Original
This page is a summary of: Multiwalled Carbon Nanotube/Fe-Doped ZnO-Based Sensors for Droplet Electrochemical Detection and Degradation Monitoring of Brilliant Green, ACS Applied Nano Materials, March 2023, American Chemical Society (ACS),
DOI: 10.1021/acsanm.3c00488.
You can read the full text:
Contributors
The following have contributed to this page
