Facile Synthesis of Mo₂C Nanoparticles from Waste Polyvinyl Chloride

Abstract

The resource utilization of waste plastic can not only control environmental pollution but can also ease up the problems of lack of energy resources. In this study, molybdenum carbide (Mo 2 C) nanoparticles have been synthesized by utilizing waste polyvinyl chloride as a carbon source in a stainless-steel autoclave at 600 °C. X-ray diffraction pattern indicates that the product is orthorhombic phase Mo 2 C. Electron microscopy photographs show that the obtained Mo 2 C product consisted of crystalline nanoparticles with an average size of 50 nm. The possible formation mechanisms of Mo 2 C have been also briefly discussed on the basis of the structures of the products synthesized with different reaction times. The effects of reaction temperature on the crystallinity and microstructure of the obtained products have been investigated. The results show that higher reaction temperature promotes the formation of Mo 2 C with high crystallinity.

CVD synthesis and characterization of thin Mo2C crystals

“…The thin crystals formed by using 5 Cu foils were further analyzed through XRD. The diffraction patterns were assigned to orthorhombic Mo 2 C phase 36 (Figure 4A). Moreover, from XRD analysis one can deduce that the crystals grew along the [100] direction which is in parallel with the literature 3 …”

Quasi‐Paired Pt Atomic Sites on Mo2C Promoting Selective Four‐Electron Oxygen Reduction

“…The X‐ray diffraction (XRD) pattern in Figure 1e confirms that the crystal structure of the support material synthesized is consistent with that of the β ‐Mo 2 C phase, with no impurity phases being observed. [ 24 , 25 , 26 ] The samples with isolated Pt single atoms and quasi‐paired Pt single atoms show no sign of the characteristic Pt peaks, indicating the absence of crystalline Pt phase, which suggests that the Pt could be atomically dispersed on Mo 2 C without agglomerating into larger nanocrystals. For the Pt nanoparticle sample (Pt NP /Mo 2 C), small Pt peaks become discernible at the 2 θ angles of 46.54° and 67.86°, indicating the appearance of crystalline Pt phase (when the Pt loading is increased by nearly fivefold to 11.18 wt%).…”

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

“…As everyone knows, waste plastic is solid waste with a high carbon content. Therefore, the waste plastic can be used as raw materials to synthesize high-valued carbon-based materials and carbides ( Wang et al, 2017 ; Wang et al, 2018 ; Dai et al, 2019 ; Wang et al, 2019a ; Wang et al, 2019b ; Wang et al, 2019c ; Wang et al, 2019d ). In this study, we have developed a new method to synthesize TiC nanoparticles by using waste PTFE as a carbon source at a low temperature of 500°C.…”