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石墨/釩氧化物的制備、表征及其對亞甲基藍(lán)的吸附性能
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1.攀枝花學(xué)院 釩鈦學(xué)院;2.四川省太陽能利用技術(shù)集成工程實(shí)驗(yàn)室

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四川省科技廳項(xiàng)目資助(項(xiàng)目號(hào)19ZYCXPT;項(xiàng)目號(hào):2020YFH0195);攀枝花市科技局項(xiàng)目資助(項(xiàng)目號(hào):2021CY-G-4)


Preparation, Characterization of Graphite/Vanadium oxide and It’s Adsorption Properties for Methylene Blue Solution
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Affiliation:

1.College of Vanadium and Titanium,Panzhihua University;2.Sichuan,China Vanadium and Titanium Resources Comprehensive Utilization Key Laboratory of Sichuan Province;3.Sichuan,China;4.Sichuan Engineering Laboratory for Solar Energy Utilization Technology Integrated

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    摘要:

    以V2O5為原料,石墨粉為還原劑,采用碳熱還原法制備石墨/釩氧化物復(fù)合材料。以亞甲基藍(lán)為模擬污染物,系統(tǒng)評(píng)價(jià)了不同還原工藝條件下所制備樣品的吸附性能,并選定在還原溫度為650℃、還原時(shí)間為60min和石墨配比為18.03%的還原條件下所制備的樣品進(jìn)行表征和作為目標(biāo)吸附劑。采用X射線衍射、掃描電鏡、X射線光電子能譜、拉曼光譜、透射電鏡和微孔分析對目標(biāo)吸附劑的微觀結(jié)構(gòu)和形貌進(jìn)行表征和分析。表征結(jié)果表明,樣品的物相由石墨、VO2和少量V6O13組成,且釩氧化物呈塊狀、條狀和輻射狀分散在片層石墨表面;樣品顆粒尺寸從幾微米到數(shù)十微米不等,BET比表面積和孔體積分別為6.84m2/g和0.02cm3/g,且絕大部分孔徑分布在介孔和大孔區(qū)間。吸附實(shí)驗(yàn)結(jié)果表明,在pH值為3~8的范圍內(nèi)石墨/釩氧化物對亞甲基藍(lán)均有較好的吸附性能,平衡吸附量均在200mg/g以上;吸附過程符合Langmuir等溫線和準(zhǔn)二級(jí)動(dòng)力學(xué)方程。

    Abstract:

    The graphite/vanadium oxide composites were prepared by a carbothermal reduction method using V2O5 as the raw material and graphite powder as the reducing agent. The Methylene blue was used as a simulated pollutant, the adsorption properties of the prepared samples in different reduction conditions were systematically evaluated, and the samples prepared at the reduction temperature of 650 ℃, reduction time of 60 min and graphite ratio of 18.03% were selected for characterization and as the target adsorbent. The microstructure and surface morphology were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, high-resolution transmission electronic microscope and BET microporous analysis. The characterization results showed that the phase of the samples consisted of graphite, VO2 and a small amount of V6O13, the vanadium oxides were dispersed on the lamellar graphite surface in the form of lumps, strips and radiations, the particle sizes of the samples ranged from a few microns to tens of microns. The BET specific surface area box pore volumes of the graphite/vanadium oxide were 6.84 m2/g and 0.02 cm3/g, respectively, and most of the pore sizes were distributed in the mesoporous and macroporous regions. The adsorption experiments results showed that the graphite/vanadium oxide had good adsorption performance on methylene blue in the pH range of 3-8, and the equilibrium adsorption amounts were above 200 mg ? g-1. The adsorption process was in accordance with the Langmuir isotherm and quasi-secondary kinetic equations.

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引用本文

吳恩輝,李軍,侯靜,徐眾,黃平,蔣燕,張遠(yuǎn),劉黔蜀.石墨/釩氧化物的制備、表征及其對亞甲基藍(lán)的吸附性能[J].稀有金屬材料與工程,2023,52(1):308~317.[Wu Enhui, Li Jun, Hou Jing, Xu Zhong, Huang Ping, Jiang Yan, Zhang Yuan, Liu Qianshu. Preparation, Characterization of Graphite/Vanadium oxide and It’s Adsorption Properties for Methylene Blue Solution[J]. Rare Metal Materials and Engineering,2023,52(1):308~317.]
DOI:10.12442/j. issn.1002-185X.20211074

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  • 收稿日期:2021-12-05
  • 最后修改日期:2022-01-29
  • 錄用日期:2022-03-07
  • 在線發(fā)布日期: 2023-02-13
  • 出版日期: 2023-02-08