本文選題：天然輝鉬礦 + 液相剝離��； 參考：《內(nèi)蒙古大學(xué)》2017年碩士論文

【摘要】：二維層狀結(jié)構(gòu)的MoS_2,由于其較大的能級(jí)間隙,彌補(bǔ)了石墨烯沒有帶隙的缺點(diǎn),隨分子層數(shù)可調(diào)的帶隙更帶來了許多獨(dú)特的光學(xué),電學(xué)性質(zhì),近幾年成為類石墨烯材料中的研究熱門。大批量獲取高質(zhì)量單層或極少層的MoS_2是應(yīng)用的前提。本論文以天然輝鉬礦為原料,研究了液相剝離制備納米MoS_2的方法,對(duì)制備的MoS_2進(jìn)行了表征及光電性能的測(cè)試,并將其應(yīng)用于光電催化協(xié)同微生物燃料電池中。主要研究內(nèi)容如下:(1)采集經(jīng)礦場(chǎng)初步富集后的天然輝鉬礦礦粉,進(jìn)一步粉碎,并分析成分和結(jié)構(gòu)。利用液相剝離MoS_2常用的兩種典型溶劑:N-甲基吡咯烷酮和表面活性劑P123的水溶液,成功地通過溫和的超聲水浴剝離得到了納米MoS_2。表征結(jié)果表明天然輝鉬礦剝離產(chǎn)物既有量子點(diǎn),又有納米片,納米片高度剝離至幾個(gè)分子層。同樣方法剝離商品MoS_2主要產(chǎn)物是量子點(diǎn),且產(chǎn)量低于輝鉬礦。(2)利用易揮發(fā)溶劑異丙醇在超聲水浴中剝離得到了MoS_2納米片,相同條件下商品MoS_2不能剝離出納米粒子�？疾炝瞬煌軇﹦冸x天然輝鉬礦方法對(duì)后續(xù)應(yīng)用的影響。異丙醇剝離MoS_2納米片雖然產(chǎn)率較低,但溶劑的易揮發(fā)性方便產(chǎn)品的后續(xù)利用。(3)提出液相剝離天然輝鉬礦增強(qiáng)剝離效率的主要原因可能為超聲時(shí)礦物中含有的石英相SiO_2的撞擊作用。(4)研究了天然輝鉬礦剝離產(chǎn)物的光電性能,證實(shí)天然輝鉬礦剝離的納米MoS_2有較優(yōu)秀的熒光發(fā)射性能和光電導(dǎo)性。利用產(chǎn)品的大比表面積和光電性能,修飾陰極提高M(jìn)FC的產(chǎn)電效率,在光照下獲得118.20mW/m~2的最大功率密度,是相同條件下空白組的近2倍,黑暗條件空白組的近3倍。
[Abstract]:Due to its large energy level gap, MoS2s in two-dimensional layered structure make up for the defect that graphene has no band gap. The band gap with adjustable molecular layer number brings many unique optical and electrical properties. In recent years, it has become a hot topic in graphene-like materials. Mass access to high-quality single-or very few layers of Mos-S-2 is a prerequisite for application. In this paper, the method of liquid phase stripping preparation of nano-MoS _ 2 was studied by using natural molybdenum as raw material. The prepared MoS _ s _ 2 was characterized and its photoelectric properties were tested, and it was applied to photocatalytic co-microbial fuel cell. The main contents of the study are as follows: (1) the natural molybdenum ore powder which has been preliminarily enriched in the mine field is collected, further comminuted, and the composition and structure are analyzed. Two typical solvents: 1. N-methylpyrrolidone and surfactant P123, which are commonly used in liquid phase stripping of MoS2, are used to obtain nano-MoSSP _ 2 by mild ultrasonic water bath stripping. The characterization results show that the natural molybdenum peeling products include both quantum dots and nanochips, which are highly stripped into several molecular layers. In the same way, the main product of mos _ 2 is quantum dots, and the output is lower than that of molybdenum. (2) MoS2 nanoparticles are obtained by stripping isopropanol, a volatile solvent, in ultrasonic water bath. The effect of different solvent stripping methods on the application of natural molybdenum was investigated. Although isopropanol peeled off MoS2 nanoparticles in low yield, However, the secondary utilization of volatile and convenient products of solvents. (3) it is suggested that the main reason for the enhanced stripping efficiency of natural molybdenum in liquid phase may be the impingement of quartz phase Sio _ 2 contained in minerals during ultrasound. (4) the impact of natural molybdenum on natural molybdenum is studied. Optoelectronic properties of peeling products, It is proved that the natural molybdenum peeling nano-MoS _ S _ 2 has excellent fluorescence emission property and photoconductivity. By using the large specific surface area and optoelectronic properties of the product, the modified cathode can improve the power generation efficiency of MFC. The maximum power density of 118.20mW / mm2 is obtained under illumination, which is nearly twice as high as that of the blank group under the same condition and nearly 3 times that of the blank group under the dark condition.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O643.36

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相關(guān)碩士學(xué)位論文 前1條

1 江濤;液相剝離天然輝鉬礦制備納米二硫化鉬及其光電催化性能研究[D];內(nèi)蒙古大學(xué);2017年

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本文編號(hào)：2113745