TiO2 nanofibers fixed in a microfluidic device for rapid determination of chemical oxygen demand via photoelectrocatalysis

Titanium Dioxide Nanomaterials for Sensor Applications

“…On the basis of the exhaustive oxidation model, one of the further modifications is to increase the electrode catalytic efficiency to shorten the detection time. Different from TiO 2 nanoparticle-based thin films, other nanostructured TiO 2 can provide larger surface area, better electron transfer efficiencies, and, ultimately, higher photoelectrocatalytic efficiencies. − Mu et al reported a TiO 2 nanofiber film that when coated on ITO glass, integrated the TiO 2 electrode into a thin-cell photoelectrocatalytic reactor for rapid determination of COD in wastewater samples. The TiO 2 nanofiber film improved the charge separation, transport, and diffusion of organics into nanofiber films, thereby accelerating the photoelectrocatlytic degradation process.…”

Electrochemical Nanocomposite-Derived Sensor for the Analysis of Chemical Oxygen Demand in Urban Wastewaters

“…In recent years, many efforts have been devoted to the fabrication of photoelectrochemical sensors based on the catalytic activity of TiO 2 . , Great attention has also been paid to the development of novel materials with electrocatalytic properties for COD sensors with amperometric detection, which unlike TiO 2 , do not require any UV light source to activate them and thus act as electrocatalysts. Although a boron-doped diamond electrode has been reported for COD detection at +2.8 V (vs Ag/AgCl), the use of materials with catalytic properties can be more advantageous in terms of power consumption, sensor lifetime, selectivity, and reproducibility.…”

Fabrication of a Highly Sensitive Single Aligned TiO2 and Gold Nanoparticle Embedded TiO2 Nano-Fiber Gas Sensor

“…Metal oxide semiconductor nanofibers are mainly used in photocatalysts, photo/electrochromics, solar cells, and sensors. − Metal oxide semiconductors such as TiO 2 , ZnO, In 2 O 3 , SnO 2 , and WO 3 with different nanostructures play an important role in producing gas sensors with significant sensitivity to toxic gases, reasonable cost, and small size. − Among various types of semiconductor sensors, the TiO 2 sensor’s high sensitivity, low cost, fast response, and long-term stability makes it an ideal candidate . The TiO 2 gas sensor not only detects oxidizing gases (O 2 , NO 2 ), but also responds to reducing gases (CO, H 2 , NH 3 , H 2 S, VOCs).…”