2; 光催化; 納米材料; 亞甲基藍(lán);溶膠-凝膠"/> 2納米材料,采用X-射線衍射(XRD)、掃描電鏡(SEM)和紫外-可見吸收光譜等測(cè)試手段,研究了制備條件對(duì)LiInO2微觀結(jié)構(gòu)的影響因素,并以亞甲基藍(lán)為目標(biāo)降解物研究了LiInO2的光催化性能。研究結(jié)果表明:制備的LiInO2納米粒子具有LiFeO2的晶型,顆粒尺寸約50-100納米,制備樣品的焙燒溫度對(duì)其結(jié)構(gòu)和性能產(chǎn)生了明顯地影響,在氙燈(300W)照射90 min條件下,納米LiInO2對(duì)亞甲基藍(lán)的光催化降解率達(dá)92%,活性位點(diǎn)捕獲實(shí)驗(yàn)表明光生空穴在降解亞甲基藍(lán)的機(jī)制中占主導(dǎo)作用。"/>

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納米LiInO2光催化劑的溶膠-凝膠法制備與表征
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環(huán)境光催化應(yīng)用技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室,環(huán)境光催化應(yīng)用技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室,環(huán)境光催化應(yīng)用技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室,環(huán)境光催化應(yīng)用技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室,環(huán)境光催化應(yīng)用技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室

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國家自然科學(xué)基金(51272032),湖南省自然科學(xué)基金(2016JJ6008),湖南省教育廳優(yōu)秀青年科研項(xiàng)目(17B029)


Preparation and characterization of LiInO2 nanoparticles (NPs) by a sol-gel method
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HunanSKey Laboratory of Applied Environmental Photocatalysis,Changsha University,Changsha,PR China,HunanSKey Laboratory of Applied Environmental Photocatalysis,Changsha University,Changsha,PR China,HunanSKey Laboratory of Applied Environmental Photocatalysis,Changsha University,Changsha,PR China,HunanSKey Laboratory of Applied Environmental Photocatalysis,Changsha University,Changsha,PR China,HunanSKey Laboratory of Applied Environmental Photocatalysis,Changsha University,Changsha,PR China

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NSFC(51272032) and Natural Science Foundation of Hunan Provincial of China (2016JJ6008) and Scientific Research Fund of Hunan Provincial Education Department(17B029)

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    摘要:

    本文利用溶膠-凝膠法制備了LiInO2納米材料,采用X-射線衍射(XRD)、掃描電鏡(SEM)和紫外-可見吸收光譜等測(cè)試手段,研究了制備條件對(duì)LiInO2微觀結(jié)構(gòu)的影響因素,并以亞甲基藍(lán)為目標(biāo)降解物研究了LiInO2的光催化性能。研究結(jié)果表明:制備的LiInO2納米粒子具有LiFeO2的晶型,顆粒尺寸約50-100納米,制備樣品的焙燒溫度對(duì)其結(jié)構(gòu)和性能產(chǎn)生了明顯地影響,在氙燈(300W)照射90 min條件下,納米LiInO2對(duì)亞甲基藍(lán)的光催化降解率達(dá)92%,活性位點(diǎn)捕獲實(shí)驗(yàn)表明光生空穴在降解亞甲基藍(lán)的機(jī)制中占主導(dǎo)作用。

    Abstract:

    LiInO2 nanoparticles (NPs) have been successfully synthesized by a sol-gel method. The structure of the as-synthesized LiInO2 NPs were characterized using X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and ultraviolet-visible (UV-vis) analysis technologies. The photocatalytic performances of samples were evaluated using the methyl blue (MB) as a model dye pollutant. Additionally, the photocatalytic degradation mechanism for MB of the LiInO2 NPs were also proposed. The results demonstrated that the as-prepared LiInO2 presented a LiFeO2 structure with the uniform size about 50~100 nm. The calcination temperature can severely impact the structure and photocatalytic performance of the LiInO2 NPs. The degradation rate of MB was 92% under simulated sunlight using 300W xenon lamp for 90 min. The trapping experiments of the reactive species showed that the holes played an important role in the process of the MB degradation. The results obtained from this work suggested that the LiInO2 NPs would have potential applications in wastewater treatment.

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張向超,黃 鍛,劉 芳,許凱強(qiáng),張世英.納米LiInO2光催化劑的溶膠-凝膠法制備與表征[J].稀有金屬材料與工程,2018,47(S2):250~253.[Xiangchao Zhang, Duan Huang, Fang Liu, Kaiqiang Xu, Shiying Zhang. Preparation and characterization of LiInO2 nanoparticles (NPs) by a sol-gel method[J]. Rare Metal Materials and Engineering,2018,47(S2):250~253.]
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  • 收稿日期:2017-11-27
  • 最后修改日期:2018-08-21
  • 錄用日期:2018-02-01
  • 在線發(fā)布日期: 2018-11-01
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