TiO2/glass film was prepared by a solgel method with titanium tetrabutoxide as precursor,and used in photocatalytic degradation of 4Chlorophenol(4CP)in aqueous solution.The crystal type and size of TiO2 in f...TiO2/glass film was prepared by a solgel method with titanium tetrabutoxide as precursor,and used in photocatalytic degradation of 4Chlorophenol(4CP)in aqueous solution.The crystal type and size of TiO2 in film prepared in different experimental conditions were characterized by using XRD.The experiments indicated that the TiO2 particles in different film appear regular anatase structure with size about 833nm after heating treatment at 500℃ temperature,and the film coated 5 layers of TiO2 sol in the case of higher(pH≥10)and lower pH value(pH≤2) showed a higher catalytic activity.The relationship between initial 4CP concentration(C0) and reaction rate(r0) follow LangmuirHinshelwood equation,and the photocatalytic degradation of 4CP(C0≤07mmol·L-1)can be expressed by first order kinetics.展开更多
TiO 2/glass film photocatalysts have been prepared by a sol gel method with titanium tetrabutoxide as precursor, and used in photocatalytic degradation of 2,4 dichlorophenol(DCP) in aqueous solution. The experiments i...TiO 2/glass film photocatalysts have been prepared by a sol gel method with titanium tetrabutoxide as precursor, and used in photocatalytic degradation of 2,4 dichlorophenol(DCP) in aqueous solution. The experiments indicated that the TiO 2/glass film coated with five layers of TiO 2 sol in the case of higher pH value(≥10) or lower pH value(≤2) showed a higher catalytic activity, and the relationship between initial DCP concentration( c 0) and reaction rate( r 0) follows Langmuir Hinshelwood equation. The photocatalytic degradation kinetics of DCP( c 0≤0 5 mmol/L) is of first order kinetics.展开更多
为提高青霉素菌渣厌氧发酵效率,试验应用响应面法对其碱热预处理工艺进行优化。采用Design-Expert8.0.6的Box-Benhken设计,以SCOD为响应值Y,研究温度、时间和碱度3个因素对青霉素菌渣预处理的影响,建立SCOD数学模型,对模型进行优化降维...为提高青霉素菌渣厌氧发酵效率,试验应用响应面法对其碱热预处理工艺进行优化。采用Design-Expert8.0.6的Box-Benhken设计,以SCOD为响应值Y,研究温度、时间和碱度3个因素对青霉素菌渣预处理的影响,建立SCOD数学模型,对模型进行优化降维分析,并进一步通过批式厌氧发酵试验进行验证。结果表明,青霉素菌渣碱热预处理最佳条件为:温度60℃,时间1.25 h,碱度6%。模型预测值和试验值之间的误差为0.8%,模型的修正决定系数为0.9994,拟合性好。厌氧发酵试验结果表明,预处理菌渣沼气产率为256.3 m L·g^(-1)TS,比对照组产气效率提高了31.4%;甲烷产率为126.7 m L·g^(-1)TS,比对照组提高了28.8%。展开更多
文摘TiO2/glass film was prepared by a solgel method with titanium tetrabutoxide as precursor,and used in photocatalytic degradation of 4Chlorophenol(4CP)in aqueous solution.The crystal type and size of TiO2 in film prepared in different experimental conditions were characterized by using XRD.The experiments indicated that the TiO2 particles in different film appear regular anatase structure with size about 833nm after heating treatment at 500℃ temperature,and the film coated 5 layers of TiO2 sol in the case of higher(pH≥10)and lower pH value(pH≤2) showed a higher catalytic activity.The relationship between initial 4CP concentration(C0) and reaction rate(r0) follow LangmuirHinshelwood equation,and the photocatalytic degradation of 4CP(C0≤07mmol·L-1)can be expressed by first order kinetics.
文摘TiO 2/glass film photocatalysts have been prepared by a sol gel method with titanium tetrabutoxide as precursor, and used in photocatalytic degradation of 2,4 dichlorophenol(DCP) in aqueous solution. The experiments indicated that the TiO 2/glass film coated with five layers of TiO 2 sol in the case of higher pH value(≥10) or lower pH value(≤2) showed a higher catalytic activity, and the relationship between initial DCP concentration( c 0) and reaction rate( r 0) follows Langmuir Hinshelwood equation. The photocatalytic degradation kinetics of DCP( c 0≤0 5 mmol/L) is of first order kinetics.
文摘为提高青霉素菌渣厌氧发酵效率,试验应用响应面法对其碱热预处理工艺进行优化。采用Design-Expert8.0.6的Box-Benhken设计,以SCOD为响应值Y,研究温度、时间和碱度3个因素对青霉素菌渣预处理的影响,建立SCOD数学模型,对模型进行优化降维分析,并进一步通过批式厌氧发酵试验进行验证。结果表明,青霉素菌渣碱热预处理最佳条件为:温度60℃,时间1.25 h,碱度6%。模型预测值和试验值之间的误差为0.8%,模型的修正决定系数为0.9994,拟合性好。厌氧发酵试验结果表明,预处理菌渣沼气产率为256.3 m L·g^(-1)TS,比对照组产气效率提高了31.4%;甲烷产率为126.7 m L·g^(-1)TS,比对照组提高了28.8%。
