Fabricating TiO₂nanocolloids by electric spark discharge method at normal temperature and pressure

Abstract

In this study, TiO nanocolloids were successfully fabricated in deionized water without using suspending agents through using the electric spark discharge method at room temperature and under normal atmospheric pressure. This method was exceptional because it did not create nanoparticle dispersion and the produced colloids contained no derivatives. The proposed method requires only traditional electrical discharge machines (EDMs), self-made magnetic stirrers, and Ti wires (purity, 99.99%). The EDM pulse on time (T ) and pulse off time (T) were respectively set at 50 and 100 μs, 100 and 100 μs, 150 and 100 μs, and 200 and 100 μs to produce four types of TiO nanocolloids. Zetasizer analysis of the nanocolloids showed that a decrease in T increased the suspension stability, but there were no significant correlations between T and particle size. Colloids produced from the four production configurations showed a minimum particle size between 29.39 and 52.85 nm and a zeta-potential between -51.2 and -46.8 mV, confirming that the method introduced in this study can be used to produce TiO nanocolloids with excellent suspension stability. Scanning electron microscopy with energy dispersive spectroscopy also indicated that the TiO colloids did not contain elements other than Ti and oxygen.

Deriving Optimized PID Parameters of Nano-Ag Colloid Prepared by Electrical Spark Discharge Method

“…Lastly, how short-circuit rate is related to particle analysis, zeta potential, and absorbance was explored [16][17][18][19]. Applying ESDM in combination with EDM, the research team of this study successfully prepared several kinds of nanocolloid, including nano-Au, nano-TiO 2 , nano-Al, and nanographene colloids [11][12][13][14]. Because traditional EDM equipment is outdated and difficult to maintain, micro-EDM equipment was developed.…”

A Study of a PID Controller Used in a Micro-Electrical Discharge Machining System to Prepare TiO2 Nanocolloids

“…The evaporated steam is rapidly cooled by DW and condensed into TiO 2 NPs. The crystal structure of the sample prepares by ESDM was measured by XRD, which contained both titanium oxide and Ti simultaneously [ 14 ]. Figure 1 shows the ESDM process [ 15 ].…”

TiO2 Katkılı Çevre Dostu Dielektrik Sıvının Elektro Erozyon Delik Delme Performanslarının Araştırılması

“…Ayrıca, TiO 2 nano partiküllerinin mükemmel oksidasyon yetenekleri sayesinde organik kirleri ve bakterileri çürütebilme özellikleri mevcut olduğu için sağlık alanında sıkça kullanılmaktadır. Yine, TiO 2 malzemesinin bunlar haricinde birçok alanda farklı uygulamaları da mevcuttur [37]. TiO 2 malzemesinin EEİ alanındaki uygulamalarına bakıldığında; Baseri ve arkadaşları, H13 çeliği işparçaları ve 200 dev/min hızla dönen bakır elektrotlar kullanarak gaz yağı dielektrik içerisine 0-1-2-3 g/l oranlarında nano boyutta TiO 2 tozu katkısıyla 2,5-6-9 A boşalım akımı ve 35-50-100 µs vurum süreleri değerleriyle deneysel çalışmalar gerçekleştirmişlerdir.…”