Electrical properties of Ag-doped ZnO nano-plates synthesized via wet chemical precipitation method

Highly selective NH3 gas sensor based on Au loaded ZnO nanostructures prepared using microwave-assisted method

“…However, like most of the semiconductor oxide-based sensors, ZnO encounters a lot of problems including poor sensitivity and lack of gas selectivity, so enhancing its gas performance and detection limit still remains a challenge [3]. To overcome these challenges, a large number of efforts (including sensing trials) such as incorporation of dopants [20][21][22][23], sensitization of the sensing layer with noble metals (Au, Ag, Pd) [24][25][26][27][28][29] and metal oxides (CuO, SnO 2 ) [30,31] as well as application of ultraviolet (UV) irradiation [32] have been made to improve the sensing performance. Among these, addition of noble metal nanoparticles such as gold (Au), silver (Ag) or palladium (Pd) on semiconducting oxide surfaces is regarded as one of the best and most effective strategies to improve gas selectivity [33].…”

A facile and fast solution chemistry synthesis of porous ZnO nanoparticles for high efficiency photodegradation of tartrazine

“…[3] Many methods have been developed to synthesis of ZnO material including vapor-phase methods [4] such as thermal evaporation, vaporliquid-solid, chemical vapour deposition (CVD), and solution phase methods like sol-gel process, hydrothermal and template growth methods. [5] As the results, the large number of ZnO morphologies have been obtained such as flowers, [6] nanorods, [7] plates, [8] nanodisk, [9] nanoparticles, [10] hollow spheres, [11] etc.…”

“…The degradation efficiency of tartrazine after 70 min follows the order: N-ZnO (100 %) > F-ZnO (85 %) > R-ZnO (21%). The photodegradation rate of tartrazine by the ZnO samples can be evaluated by using the the pseudo-first-order model called Langmuir-Hinshelwood model as following: ln = kt (8) where and are the concentration of tartrazine at initial (t = 0) and time t (min), respectively; k is the pseudo first-order rate constant.The k values were calculated from the slope of the ln (C 0 /C t ) − t plots. Figure 4(c) exhibits the kinetic curves for tartrazine degradation.…”

Shape-controlled magnetic nanoplatelets of Ni-doped ZnO synthesized via a chemical precursor

“…Paul et al synthesized metastable solid solutions of Zn 1-x Co x O by hydrolysis of ionic zinc and cobalt salts in polyol medium [39], which was further explored by Naeem et al [40,41]. Mahmoud [46,47]. Undoubtedly, these approaches show much promise for scaled-up use in industrial processes.…”