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浅探近距离煤层开拓巷道的联合布置 被引量:1
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作者 侯保青 《中州煤炭》 2011年第1期41-42,共2页
为了保证矿井开采水平的合理接替,对近距离煤层的水平延伸方案进行了研究。采用联合布置的方法,在下一煤层开拓巷道开口通过施工斜巷到达上一煤层,减少了工程量,缩短了水平、采区接替时间。研究结果表明,近距离煤层开拓巷道联合布置系... 为了保证矿井开采水平的合理接替,对近距离煤层的水平延伸方案进行了研究。采用联合布置的方法,在下一煤层开拓巷道开口通过施工斜巷到达上一煤层,减少了工程量,缩短了水平、采区接替时间。研究结果表明,近距离煤层开拓巷道联合布置系统设计简单、优化合理。 展开更多
关键词 二2煤 2 近距离 开拓巷道 联合布置
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Photocatalytic activity of TiO_2 supported SiO_2-Al_2O_3 aerogels prepared from industrial fly ash 被引量:8
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作者 王慧龙 齐慧萍 +2 位作者 魏晓娜 刘潇彧 姜文凤 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第11期2025-2033,共9页
A ternary composite of TiO2 and a SiO2-Al2O3 aerogel with good photocatalytic activity was prepared by a simple sol-gel method with TiO2 nanoparticles and SiO2-Al2O3 aerogels derived from industrial fly ash.The struct... A ternary composite of TiO2 and a SiO2-Al2O3 aerogel with good photocatalytic activity was prepared by a simple sol-gel method with TiO2 nanoparticles and SiO2-Al2O3 aerogels derived from industrial fly ash.The structural features of the TiO2/SiO2-Al2O3 aerogel composite were investigated by X-ray powder diffraction,Fourier transform infrared spectroscopy,transmission electron microscopy,gas adsorption measurements and diffuse reflectance UV-visible spectroscopy.The optimal conditions for photocatalytic degradation of 2-sec-butyl-4,6-dinitrophenol(DNBP],included an initial DNBP concentration of 0.167 mmol/L at pH = 4.86 with a catalyst concentration of 6 g/L,under visible light irradiation for 5 h.A plausible mechanism is proposed for the photocatalytic degradation of DNBP.Our composite showed higher photocatalytic activity for DNBP degradation than that of pure TiO2.This indicates that this material can serve as an efficient photocatalyst for degradation of hazardous organic pollutants in wastewater. 展开更多
关键词 Titania SiO2-Al2O3 aerogel Composite photocatalyst Industrial fly ash 2-sec-butyl-4 6-dinitrophenol Wastewater treatment
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