Trimethylamine sensing properties of CdO–Fe2O3 nano-materials prepared using co-precipitation method in the presence of PEG400

Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis

“…XPS analysis of pure SnO2 hollow spheres and Rh-SnO2 fine-scanned spectra of (a) Sn 3d and (b) Rh 3d. [1,2,9,11,18,20] and (b) the increase of gas response by catalyst loading/doping or composite formation (S C : gas response of catalyst-loaded, catalyst-doped, or composite sensors. SP : gas response of sensors using pure sensing materials) (ZATV: Al2O3-(4 wt%), TiO2-(1 wt%), and V2O5-(0.2 wt%) doped ZnO).…”

“…In recent years, there has been significant demand for the development of reliable analytical methods for assessing fish freshness in order to reduce public concern about food safety [1]. Trimethylamine (TMA) is secreted during the decomposition of trimethylamine N-oxide (TMAO) in dead fish and sea creatures [2,3].…”

Metal Oxide Based Heterojunctions for Gas Sensors: A Review

“…With the development in the techniques to synthesise nanomaterials, it is facile to construct heterojunctions in composites composed of metal oxides. The metal oxide-based heterojunctions have been successfully established through various combined technologies, such as the thermal oxidation [ 28 ], hydrothermal method [ 32 ], electrospinning [ 33 , 34 ], chemical vapour deposition (CVD) [ 35 ], pulsed laser deposition (PLD) [ 36 ], the co-precipitation method [ 37 ] and the solvothermal method [ 38 ]. For example, the hydrothermal method was reported to effectively prepare the ZnO/SnO 2 [ 39 ] and the NiO/SnO 2 composites [ 32 ].…”

Trimethylamine Sensors Based on Au-Modified Hierarchical Porous Single-Crystalline ZnO Nanosheets

“…Comparing to other sensing technologies, metal oxide semiconductor sensors have been widely used due to their advantages including low cost, compact size, on-line and simple operation [ 6 , 7 ]. During the past years, sensing metal oxide semiconductors with different morphologies and structures have been used to fabricate gas sensors, such as punched ZnO nanobelt network [ 5 ], SnO 2 -ZnO nanocomposite [ 8 ], TiO 2 -SnO 2 nanocomposite [ 9 ], ZnO-In 2 O 3 composite nanofibers [ 10 ], CdO-Fe 2 O 3 nanomaterials [ 11 ], and branch-like hierarchical hetero-structure (α-Fe 2 O 3 /TiO 2 ) [ 12 ]. ZnO has been used as gas-sensing materials because of its unique electronic properties [ 13 ].…”