Work

Developing innovative filtration membranes based on SiO2/TiO2/Cdot(N) nanoarchitectures for environmental applications

Year: 2025

Type: article

Abstract: This work describes the development of nylon filtration membranes modified with SiO 2 /TiO 2 /Cdot(N) nanostructures containing 0.25, 0.5, 1, and 2 % of TiO 2 , which have been used to remove methylene blue, methyl orange, and bisphenol A from tap water. SiO 2 /TiO 2 /Cdot(N) nanostructures have been prepared by direct reaction of nitrogen-doped carbon quantum dots (Cdot(N)), titanium isopropoxide, and silica source. FTIR, SEM, EDS, and HR-TEM were used to characterize the different SiO 2 /TiO 2 /Cdot(N) nanostructures. The retention capacities of modified membranes were calculated using the standard addition method with UV spectroscopy at wavelengths of 275, 464, and 664 nm, exhibiting good retention capacities of 95 % for methylene blue, 96 % for methyl orange, and 97 % for bisphenol A per gram of sorbent. The nylon filtration membrane modified with SiO 2 /0.5 %TiO 2 /Cdot(N) nanostructures exhibits excellent performance in retaining these substances in a real water sample, surpassing both bare nylon and nylon modified with SiO 2 /Cdot(N) in terms of retention capacity and mechanical stability. It can be used to avoid environmental contamination by these species from industrial wastewater.

Source: Nano Trends

DOI: 10.1016/j.nwnano.2025.100142

Authors: Luccas L Name, Daniel Y Tiba, Laura C. Lieb, Thiago C Canevari

Institution: Universidade Presbiteriana Mackenzie

Language: English

Topic: Membrane Separation Technologies

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $2,000