Synthesis and Supercapacitor Application of Alkynyl Carbon Materials Derived from CaC₂ and Polyhalogenated Hydrocarbons by Interfacial Mechanochemical Reactions

Abstract

The discovery of new carbon materials and the reactive activation of CaC are challenging subjects. In this study, a series of alkynyl carbon materials (ACMs) were synthesized by the interfacial mechanochemical reaction of CaC with four typical polyhalogenated hydrocarbons. Their properties and structures were characterized, and their electrochemical performances were examined. The reaction was rapid and efficient arising from the intense mechanical activation of CaC. The ACMs are micro-mesoporous materials with distinct layered structure, specific graphitization degree, and clear existence of sp-C. In addition, the ACMs exhibit high specific capacitance in the range of 57-133 F g and thus can be ideal candidates for active materials used in supercapacitors. The results may imply an alternative synthesis of carbon allotropes, as well as an efficient approach for the activation of CaC.

Synthesis of Highly Crystalline Graphite from Spontaneous Ignition of In Situ Derived Acetylene and Chlorine at Ambient Conditions

“…In addition to this peak, we also observe the (004) plane of graphite [10]. Very weak reflections of between 30 • and 50 • are assigned to iron impurities (α-Fe 2 O 3 , Fe, Fe 3 C) that confer magnetic character to the product, whereas the peak near 60 • is assigned to SiC contaminants [6,8]. Such impurities are quite common in CaC 2 -derived carbons and originate from the starting calcium carbide [6,8].…”

“…Calcium carbide (CaC 2 ) is considered a useful and inexpensive reagent towards carbon nanomaterials [5,6]. For instance, simple acid hydrolysis of CaC 2 has resulted in high-quality graphene at ambient conditions [7].…”

Mechanochemical Synthesis of γ‐Graphyne with Enhanced Lithium Storage Performance

“…Mechanochemical synthesis is one of the fascinating synthetic approaches with notable simple, rapid, and reproducible properties . Besides, the method is also considered to overcome the problems related to the solution‐based chemistry processes .…”

“…For example, Turberg et al prepared 1,4‐diamino‐2‐butynes by using calcium carbide (CaC 2 ) as the acetylene source by the mechanochemical strategy . Mechanochemical method has been applied in metal–organic framework derived electrocatalysts and carbon materials …”

Calcium‐Based Sustainable Chemical Technologies for Total Carbon Recycling

“…[184c] Saturated desulfurizing sorbents can be regenerated by elutionwith minimal losses of the initial sorptionc apacity.A dditionally,A CMs of high specific capacitance, showing good electrical conduc-tivitiesa nd rate capabilities, can be used in supercapacitors. [185] The same principle can be appliedf or the efficient destruction of toxic perhalogenated hydrocarbons in the ball-milling of calcium carbidewith halogenated hydrocarbons. [186] Another absorptive material is composed of calcium carbide furnace dust mixed with FA.T he dust can be isolated from the off-gas by using af ixed-bed reactor.…”