Preparation of lead oxide nanoparticles from cathode-ray tube funnel glass by self-propagating method

Abstract

a b s t r a c tThis paper presents a novel process of extracting lead oxide nanoparticles from cathode-ray tube (CRT) funnel glass using self-propagating high-temperature synthesis (SHS) method. The impacts of added amount of funnel glass on the extraction ratio of lead, the lead extraction velocity and the micromorphology, as well as particle size of extracted nanoparticles were investigated. We found that self-propagating reaction in the presence of Mg and Fe 2 O 3 could separate lead preferentially and superfine lead oxide nanoparticles were obtained from a collecting chamber. The separation ratio was related closely to the amount of funnel glass added in the original mixture. At funnel glass addition of no more than 40 wt.%, over 90 wt.% of lead was recovered from funnel glass. High extraction yield reveals that the network structure of funnel glass was fractured due to the dramatic energy generated during the SHS melting process. The PbO nanoparticles collected show good dispersion and morphology with a mean grain size of 40-50 nm.

Zinc Ferrite Nanorod‐Assembled Mesoporous Microspheres as Advanced Anode Materials for Sodium‐Ion Batteries

“…In particular, the XRD pattern displayed a few of noise and an uneven baseline in the 2 θ range of 20 o –25 o . This may be caused by the formation of a small amount of amorphous phase in the sample …”

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“…90% of the lead weight was recovered in the samples containing lead up to 40%. The ambient temperature decreased significantly with the increasing funnel glass percentage, and the recovery rate of lead in the samples containing over 40% of funnel glass was reduced [132].…”

“…In their work, Wang Y and Zhu J [132] studied lead funnels that were pulverized and mixed with magnesium (Mg) and iron oxide (Fe 2 O 3 ) to form samples with different funnel-glass ratios and reacted under high temperature in an argoncleaned environment. During the reaction, the volatilized lead was concentrated in the reactor walls and was obtained in a powder form.…”

Water-soluble lead in cathode ray tube funnel glass melted in a reductive atmosphere

“…Several researchers have proposed lead recovery techniques [9][10][11][12][13][14][15][16][17][18][19][20], and this study focuses on the reduction-melting process among the techniques. In this process, the lead oxides in the funnel glass are converted to metallic lead and separated from the glass phase; this allows the recovery of approximately 90% of the lead from the glass.…”