Damage-Free Removal of Residual Carbon in a Dielectric Barrier Discharge (DBD) Plasma for Carbothermal-Synthesized Materials

Abstract

In this work, we demonstrate damage-free removal of residual carbon in a dielectric barrier discharge (DBD) plasma for carbothermal-synthesized materials, such as CaAlSiN3:Eu2+ phosphors, SnSb alloy anode materials, and TiN ceramic powders. The efficiency of residual carbon removal and the damaging effects of the plasma for treated materials are investigated in detail, with carbothermal-synthesized CaAlSiN3:Eu2+ phosphors being used as an example. Results show that the residual carbon in carbothermal-synthesized CaAlSiN3:Eu2+ phosphors could be removed effectively within a DBD plasma generator, resulting in the significant improvement of luminescent properties. The damage-free character of this DBD plasma decarburization process to phosphors is revealed, showing amazing superiority over the traditional high-temperature decarburization route. These results offer an attractive strategy for the removal of residual carbon for various carbothermal-synthesized materials with finely controlled compositions.

Degradation of Stains from Metal Surfaces Using a DBD Plasma Microreactor

“…This phenomenon was also observed in SEM images, where irregular-shaped particles of lycopene exist on the surface of the Al plate but disappeared after plasma treatment (row 2). It can be inferred that lycopene stains can be rapidly degraded in the DBD plasma microreactor without damaging the metal plates [ 26 , 27 ]. AFM characterization was performed to further examine the topography of the samples before and after plasma treatment (row 3).…”

Synthesis of nitride phosphor using entire oxides raw materials and their photoluminescence properties

“…Postremoval of residual carbon is required for the carbothermal‐synthesized phosphors. Comparing with the commonly used high‐temperature oxidation route, a damage‐free low‐temperature plasma removal technique was exploited by our group in very recently to remove the residual carbon from carbothermal‐synthesized phosphors . The luminescent properties of carbothermal‐synthesized phosphor could be significantly enhanced when the residual carbon was removed by plasma treatment.…”

“…Comparing with the commonly used high-temperature oxidation route, a damage-free low-temperature plasma removal technique was exploited by our group in very recently to remove the residual carbon from carbothermal-synthesized phosphors. 22 The luminescent properties of carbothermal-synthesized phosphor could be significantly enhanced when the residual carbon was removed by plasma treatment. Herein, similar lowtemperature plasma removal technique was employed to reduce the amount of residual carbon for as-prepared Sr 2 Si 5 N 8 :Eu 2+ phosphor.…”

Regulating the vacancies of nitrogen-doped carbon nanohorns for high-performance electromagnetic wave absorption

“…Furthermore, the RL and EAB of the modified SWCNHs remain unsatisfactory for EMWA applications. 24,25 Therefore, a method that can effectively introduce defects into SWCNHs without disrupting their unique structure while also meeting the requirements of highperformance RL and EAB is necessary.…”