电气石自发电极对反应体系的影响及机理研究

Research on effect and spontaneous electrical polarity of tourmaline on reaction system and its underlying mechanism

为探究电气石压电性和热电性对溶液体系的电化学作用,通过改变溶液体系中电气石的投加量、搅拌强度和温度,采用循环伏安法测定电气石对溶液中反应过程的影响,揭示在不同因素下,电气石自发电极对反应的影响及其机理。结果表明,在电气石自发电场的作用下中性的溶液体系调节呈弱碱性状态,电气石具有调节溶液pH的作用。电气石在受到应力和受热的条件下,结构改变,晶体内部产生极化电荷,形成极化电场,使水分子中的O—H键断裂,电气石对H^+的吸附加快,对溶液pH的调节速度加快。高投加量和高强度搅拌均会对体系中的离子扩散、反应等过程产生促进作用,进而促进相应电化学作用。

This paper attempts to investigate the electrochemical effect of tourmaline piezoelectricity and thermoelectricity on the solution system. The targeted study involves determining the effect of tourmaline on the reaction process in solution by changing the dosage of tourmaline in the solution system,mixing strength and temperature employing voltammetry; and identifying the effect of tourmaline spontaneous electrode on reaction and its mechanism under different factors. The results demonstrate that under the action of spontaneous electric field of tourmaline,the neutral solution system is adjusted into a weak alkaline state so that tourmaline has the effect of regulating the solution of pH; tourmaline subjected to stress and heat undergoes structure change in which polarization charge occurs in the crystal and a polarized electric field is formed to break the O—H bonds in the water molecules and this accelerates the adsorption of tourmaline on H^＋,and the regulation of pH in solution. It follows that high dosage and high intensity mixing could promote the process of ion diffusion and reaction and thus the corresponding electrochemical effect.