原始名称记载: United Arab Emirates University

The present disclosure relates to bio-sludge, and biochar based nanocomposite material, and preparation methods thereof. In particular, the present disclosure relates to a bio-sludge and biochar based TiOnanocomposite materials for photocatalytic COreduction and a preparation method thereof.

There is disclosed a metal ion detection device, comprising a working electrode on which a droplet of the solution sample is placed, a counter electrode; and a reference electrode, wherein a droplet of a pH indicator solution is further placed on the working electrode surface after drying the working electrode surface, leading to conversion of metal ions present in the solution sample to corresponding metal atoms and deposition of the metal atoms on the working electrode surface. The working electrode is a glassy carbon electrode modified with amino-functionalized multi-walled carbon nanotubes (MWCNTs-NH) and an amide derivative of benzoic acid (ADB). The device enables multi-metal ions detection, toxic metal ions removal from wastewater and metals enrichment/recovery via electroreduction. A method of detecting multiple co-existing metal ions from a solution sample is also proposed.