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

Shingange, Katekani; Tshabalala, Zamaswazi P.; Ntwaeaborwa, O.M.; Motaung, David E.; Mhlongo, G.H.

doi:10.1016/j.jcis.2016.06.046

Cited by 132 publications

(57 citation statements)

References 63 publications

(82 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7 b), 4 ml (Fig.7 c) and 6 ml ( Fig. 7 d) [32][33][34][35][36]. The change in the peak shapes and increased intensity of the highest binding energy components (Fig.…”

Section: Nmmentioning

confidence: 87%

Influence of ammonia concentration on the microstructure, electrical and raman properties of low temperature chemical bath deposited ZnO nanorods

Mwankemwa

Nambala

Kyeyune

et al. 2017

Materials Science in Semiconductor Processing

View full text Add to dashboard Cite

Nanostructured zinc oxide synthesized using an easy and low temperature chemical bath deposition method are among the most promising low cost semiconducting nanostructures investigated for a variety of applications. We successfully report the effects of ammonia solution in the growth of ZnO nanorods at a temperature of 60 °C. Successive addition of ammonia altered the degree of supersaturation of the growth solution, causing a significant deviation in the morphology and crystal orientation of ZnO nanorods. Field emission scanning Electron Microscopy images revealed changes in surface morphology of ZnO nanorods with respect to addition of specific amounts of ammonia. X-ray diffraction analysis revealed wurtzite crystal structure of ZnO which was further further supported by X-ray photoelectron studies, optical absorbance and Raman spectra that also revealed the existence of wurtzite ZnO. The current-voltage measurement showed the electrical properties of the synthesized ZnO nanorods. The vertically grown nanorods with flat tops, effect more rectifying Schottky contacts to be realized on comparison to needle like structures.

show abstract

“…7 b), 4 ml (Fig.7 c) and 6 ml ( Fig. 7 d) [32][33][34][35][36]. The change in the peak shapes and increased intensity of the highest binding energy components (Fig.…”

Section: Nmmentioning

confidence: 87%

Influence of ammonia concentration on the microstructure, electrical and raman properties of low temperature chemical bath deposited ZnO nanorods

Mwankemwa

Nambala

Kyeyune

et al. 2017

Materials Science in Semiconductor Processing

View full text Add to dashboard Cite

show abstract

“…Microwave hydrothermal synthesis of ZnO nanocomposites or ZnO hybrid nanostructures with additional heat treatment, where the literature review results [ 724 , 725 , 726 , 727 , 728 , 729 , 730 , 731 , 732 , 733 , 734 , 735 , 736 , 737 , 738 ] are summarised in Table 8 .…”

Section: Microwave Hydrothermal Synthesis Of Znomentioning

confidence: 99%

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

2020

View full text Add to dashboard Cite

Zinc oxide (ZnO) is a multifunctional material due to its exceptional physicochemical properties and broad usefulness. The special properties resulting from the reduction of the material size from the macro scale to the nano scale has made the application of ZnO nanomaterials (ZnO NMs) more popular in numerous consumer products. In recent years, particular attention has been drawn to the development of various methods of ZnO NMs synthesis, which above all meet the requirements of the green chemistry approach. The application of the microwave heating technology when obtaining ZnO NMs enables the development of new methods of syntheses, which are characterised by, among others, the possibility to control the properties, repeatability, reproducibility, short synthesis duration, low price, purity, and fulfilment of the eco-friendly approach criterion. The dynamic development of materials engineering is the reason why it is necessary to obtain ZnO NMs with strictly defined properties. The present review aims to discuss the state of the art regarding the microwave synthesis of undoped and doped ZnO NMs. The first part of the review presents the properties of ZnO and new applications of ZnO NMs. Subsequently, the properties of microwave heating are discussed and compared with conventional heating and areas of application are presented. The final part of the paper presents reactants, parameters of processes, and the morphology of products, with a division of the microwave synthesis of ZnO NMs into three primary groups, namely hydrothermal, solvothermal, and hybrid methods.

show abstract

“…The coupling of TiO 2 and ZnO with the polyaniline also improved the response and selectivity of the materials at RT [70,71]. The functionalization of ZnO nanorods by Au enhanced the sensing performance of the structure at RT, and in the meantime, decreased the response and recovery time of ZnO [72]. Li et al improved the response of SnO 2 nanotubes towards NH 3 at RT by fabricating a SnO 2 /SnS 2 composite material [73].…”

Section: Food Quality Controlmentioning

confidence: 99%

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

et al. 2018

View full text Add to dashboard Cite

Metal oxide materials have been applied in different fields due to their excellent functional properties. Metal oxides nanostructuration, preparation with the various morphologies, and their coupling with other structures enhance the unique properties of the materials and open new perspectives for their application in the food industry. Chemical gas sensors that are based on semiconducting metal oxide materials can detect the presence of toxins and volatile organic compounds that are produced in food products due to their spoilage and hazardous processes that may take place during the food aging and transportation. Metal oxide nanomaterials can be used in food processing, packaging, and the preservation industry as well. Moreover, the metal oxide-based nanocomposite structures can provide many advantageous features to the final food packaging material, such as antimicrobial activity, enzyme immobilization, oxygen scavenging, mechanical strength, increasing the stability and the shelf life of food, and securing the food against humidity, temperature, and other physiological factors. In this paper, we review the most recent achievements on the synthesis of metal oxide-based nanostructures and their applications in food quality monitoring and active and intelligent packaging.

show abstract

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

Cited by 132 publications

References 63 publications

Influence of ammonia concentration on the microstructure, electrical and raman properties of low temperature chemical bath deposited ZnO nanorods

Influence of ammonia concentration on the microstructure, electrical and raman properties of low temperature chemical bath deposited ZnO nanorods

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

Contact Info

Product

Resources

About