One step transformation of waste polyvinyl chloride to tantalum carbide@carbon nanocomposite at low temperature

Abstract

With the increasing use of plastic products, the environmental pollution has become more and more serious, and it also prompts us to focus on the urgent problem: how do we deal with the waste plastic? This work develops a facile procedure to convert waste polyvinyl chloride (PVC) into tantalum carbide@carbon, via the chemical reaction of waste PVC, tantalum pentoxide, and metallic lithium in a stainless‐steel autoclave at 700°C. The structures, compositions, and morphologies of the as‐obtained products have been investigated by X‐ray diffraction pattern and electron microscopy. Furthermore, the effect of the reaction temperature on the composition and morphology of the as‐obtained products has been investigated. The possible formation mechanism of tantalum carbide has also been briefly discussed.

Zero-strain strategy incorporating TaC with Ta2O5 to enhance its rate capacity for long-term lithium storage

“…As for Ta 2 O 5 /TaC, there were four well-resolved peaks corresponding to the Ta–C bond in TaC (23.8 eV and 25.7 eV for Ta 4f 7/2 and Ta 4f 5/2 , respectively) and the Ta–O bond in Ta 2 O 5 (27.2 eV and 29.1 eV for 4f 7/2 and 4f 5/2 , respectively). 26,31 For the pure TaC, the peaks located at 26.4 and 28.1 eV could be ascribed to the Ta–O bond, resulting from the natural oxidation of carbide during air exposure. Also, another two peaks at 23.5 and 25.4 eV were associated with Ta 4f 7/2 and Ta 4f 5/2 for TaC.…”

“…The Ta 2 O 5 /TaC heterostructure was fabricated via a reux polymerization and solvothermal precipitation process, followed by a partial reduction of Ta 2 O 5 to generate TaC. TaC with a high elastic modulus (537 GPa) was inferred to feature a zero-strain property, 26 which was further conrmed by the ex situ and in situ X-ray diffraction (XRD) patterns. Such a zerostrain and conductive TaC alleviated the large volume expansion of the whole electrode during the lithiation/delithiation process.…”

Mechanosynthesis of TaC-WC powders under environmental conditions and their consolidation via electric arc furnace

“…TaC powders are commonly synthesized through a carburization reaction at 1700 °C, using carbon and tantalum oxide (Ta 2 O 5 ) as starting materials [8]. Other techniques have been employed, including solid-phase combustion synthesis, sol-gel method, chemical vapor deposition, carbothermal reduction and selfpropagating high temperature synthesis [9]. Li et al used a solid-state reaction process involving Ta 2 O 5 and C 3 N 4 at 1150 °C for 1 h [10].…”

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.…”