靜電紡絲法製備銅/氮摻雜碳奈米纖維應用於類芬頓程序移除有機染料

Electrospinning Preparation of Copper/N-doped Carbon Nanofiber for the Removal of Organic Dye in Fenton-like Processes

邱天保(TIEN-PAO CHIU)

指導教授 ： 林義峯

中原大學/工學院/化學工程研究所/碩士(2020年)

https://doi.org/10.6840/cycu202000325

摘要

近年來工業廢水汙染日益嚴重，類芬頓程序是以異相觸媒催化氧化劑生成具有強氧化還原電位之自由基，進而將廢水中的有機染料降解與去除，其擁有高效且無二次汙染等優勢，近年來備受各界期待。
本研究將一水合乙酸銅、三聚氰胺、聚丙烯腈與二甲基甲醯胺作為前驅物，利用靜電紡絲法將其紡成乙酸銅/三聚氰胺-聚丙烯腈奈米纖維(Cu(CH3COO)2/Melamine-PANNF)並將其置於空氣300 °C進行預氧化，再以氮氣600 °C進行鍛燒，使三聚氰胺與PAN碳化轉變為氮摻雜碳奈米纖維，其中有無添加三聚氰胺，以及乙酸銅的含量會影響碳化過後銅化合物之組成。由於零價銅(Cu0)在過去文獻中可以藉由與過氧化氫氧化並在Cu0與Cu+之間進行電子轉移而產生Cu+，而Cu+對於催化過氧化氫之反應速率常數極高，因此本實驗以銅/氮摻雜碳奈米纖維(Cu/M-NCNF)作為異相觸媒
，希望藉由金屬銅在類芬頓程序中可再生與光催化特性；氮摻雜碳奈米纖維一維的纖維結構、良好的分散性與高軸比等特性，並將其應用於光輔助類芬頓程序之中來降解羅丹明B，另外也針對操作參數如:染料濃度、氧化劑濃度、觸媒濃度，以及系統環境，如:系統酸鹼程度、自由基抑制劑等進行討論，以達到高效降解有機染料之目標。

關鍵字

氧化銅 ； 金屬銅 ； 靜電紡絲法 ； 類芬頓程序

並列摘要

In recent years, industrial wastewater pollution has become more and more serious. The Fenton-like process, which uses heterogeneous catalyst react with oxidants to generate free radicals with a high redox potential. Then, degrades organic pollutants in wastewater. It has the advantages of high efficiency and no secondary pollution. In recent years, widely expected by the industry.

In this study, Copper acetate/Melamine-Polyacrylonitrile Nanofiber composite material was prepared using copper acetate monohydrate, melamine, polyacrylonitrile and Dimethylformamide as precursors by the electrospinning method. Which was stabilized by heating in air at 300 °C . Finally, the specimens were carbonized at 600 °C in nitrogen to convert melamine and PAN to nitrogen-doped carbon nanofibers. The presence or absence of melamine and the content of copper acetate will affect the composition of the copper compound after carbonization. In the past literature, zero-valent copper (Cu0) can generate Cu+ by oxidation with hydrogen peroxide and electron transfer between Cu0 and Cu+. Because of the reaction rate constant of Cu+ for catalyzing hydrogen peroxide is extremely high. Therefore, in this experiment, the Copper/Nitrogen-doped Carbon Nanofibers(Cu/M-NCNF) as heterogeneous catalysts. It is hoped that copper can be regenerated and light catalytic properties in the Fenton-like process. Nitrogen-doped carbon nanofibers have one-dimensional fiber structure, good dispersibility and high axial ratio applying to the light-assisted Fenton-like Process to degrade Rhodamine B. The study will also compare the above catalyst, including the operating parameters such as dye concentration, oxidant concentration, catalyst concentration, and system environment, such as pH value in system and free radical inhibitors. to achieve the goal of efficient degradation of organic dyes.

並列關鍵字

Copper oxide ； Copper ； Electrospinning ； Fenton-like Processes

參考文獻

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[5] R. Connor, The United Nations world water development report water for a sustainable world." UNESCO publishing, 2015.