基于BP神经网络优化的Cu-Ce/TiO_2制备及表征
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摘要
以硝酸铜与硝酸铈对TiO_2进行改性制备Cu-Ce/TiO_2。通过均匀设计与BP神经网络结合,研究Cu-Ce/TiO_2制备工艺参数,即Cu-Ce/TiO_2中Cu-Ce与TiO_2的物质的量比、Cu-Ce/TiO_2中Cu与Ce的物质的量比、Cu-Ce/TiO_2凝胶的煅烧温度、煅烧的升温速度和煅烧后恒温时间对Cu-Ce/TiO_2湿性能和光催化性能的影响。构建制备工艺参数与性能的Cu-Ce/TiO_2BP神经网络优化模型,获得优化制备工艺参数,并对优化Cu-Ce/TiO_2进行性能测试与表征。结果表明,优化Cu-Ce/TiO_2制备工艺参数:Cu-Ce/TiO_2中Cu-Ce与TiO_2的物质的量比为0. 033、Cu-Ce/TiO_2中Cu与Ce的物质的量比为0. 89、Cu-Ce/TiO_2凝胶的煅烧温度为502℃、煅烧的升温速度为1. 8℃/min和煅烧后恒温时间为1. 6 h。优化Cu-Ce/TiO_2的湿性能为0. 087 1 g/g,优化Cu-Ce/TiO_2的光催化性能为51. 5%。对Cu-Ce/TiO_2制备工艺参数进行优化,尤其是煅烧的升温速度与煅烧后恒温时间进行优化,可以进一步促使优化Cu-Ce/TiO_2的粒径降低、均匀性增加。
Cu-Ce/TiO_2 was prepared by doping Cu and Ce respectively. Impacts on photocatalytic performance of Cu-Ce/TiO_2 exerted by various preparation parameters,namely,mole ratio of Cu-Ce and TiO_2,mole ratio of Cu and Ce,calcination temperature of Cu-Ce/TiO_2,rate of temperature increase of Cu-Ce/TiO_2 and holding time at constant temperature,were researched by combining uniform design with BP neural network. Optimization model based on BP neural network was established to obtain optimized preparation parameters of Cu-Ce/TiO_2,of which the photocatalytic performance were tested and characterized. Results show that optimized values of abovementioned preparation parameters are 0. 033,0. 89,502℃,1. 8 ℃/min and 1. 6 h respectively and accordingly. And optimized humidity and photocatalytic property are presented as 0. 087 1 g/g and 51. 5%. Optimization on preparation parameters of Cu-Ce/TiO_2 especially in terms of temperature increase rate and holding time at constant temperature can promote decrease of particle size as well as increase of uniformity.
Cu-Ce/TiO_2 was prepared by doping Cu and Ce respectively. Impacts on photocatalytic performance of Cu-Ce/TiO_2 exerted by various preparation parameters,namely,mole ratio of Cu-Ce and TiO_2,mole ratio of Cu and Ce,calcination temperature of Cu-Ce/TiO_2,rate of temperature increase of Cu-Ce/TiO_2 and holding time at constant temperature,were researched by combining uniform design with BP neural network. Optimization model based on BP neural network was established to obtain optimized preparation parameters of Cu-Ce/TiO_2,of which the photocatalytic performance were tested and characterized. Results show that optimized values of abovementioned preparation parameters are 0. 033,0. 89,502℃,1. 8 ℃/min and 1. 6 h respectively and accordingly. And optimized humidity and photocatalytic property are presented as 0. 087 1 g/g and 51. 5%. Optimization on preparation parameters of Cu-Ce/TiO_2 especially in terms of temperature increase rate and holding time at constant temperature can promote decrease of particle size as well as increase of uniformity.
引文
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[2] Yu C L,Fan C F,Yu J M,et al. Preparation of bismuth oxyiodides and oxides and their photooxidation characteristic under visible/UV light irradiation[J]. Material Research Bulletin,2011,46(1):140-146.
[3] Li P,Deng S H,Li Y B,et al. First-principles study on neutral nitrogen impurities in zinc oxide[J]. Chinese Journal of Chemical Physics,2012,25(1):48-52.
[4] Setiawati E,Kawano K. Stabilization of anatase phase in the rare earth; Eu and Sm ion doped nanoparticle Ti O2[J]. Journal of Alloys and Compounds,2008,451:294-295.
[5] Yu J G,Wang G H,Cheng B,et al. Effects of hydrothermal temperature and time on the photocatalytic activity and microstructures of bimodal mesoporous Ti O2powders[J]. Applied Catalysis B,2007,69(3):171-180.
[6] Syoufian A,Nakashima K. Degradation of methylene blue in aqueous dispersion of hollow titania photocatalyst:optimization of reaction by peroxydisulfate electron scavenger[J]. Journal of Colloid and Interface Science,2007,313(1):213-218.
[7]刘阳龙,郑玉婴,尚鹏博.铕掺杂的Ti O2的制备及光催化性能[J].无机材料学报,2015,30(7):699-705.
[8]尚鹏博,郑玉婴,冀峰,等.锌离子掺杂的二氧化钛介孔空心微球的制备及光催化性能[J].无机化学学报,2014,30(10):2323-2331.
[9]付丹,孙彤,穆柏春,等.负载型Ti O2光催化剂的制备及其性能研究[J].辽宁化工,2005,34(8):326-328.
[10]唐守强,何菁萍,张昭.铁掺杂介孔二氧化钛的制备及其光催化性能[J].硅酸盐学报,2012,40(7):951-956.
[11]罗菲菲,简淼夫. F掺杂Ti O2的制备及其光催化性能研究[J].化工新型材料,2018,46(4):144-147.
[12]崔红,姚静文,张艳峰,等.氟掺杂二氧化钛的制备及光催化性能[J].河北师范大学学报:自然科学版,2018,42(4):322-326.
[13]杨小妮,田养利,张红.基于光-湿性能的Cu-Ce/Ti O2复合材料制备与表征[J].化工新型材料,2017,45(9):95-98.
[14]尚建丽,张浩,熊磊,等.基于均匀设计优化制备癸酸-棕榈酸/Si O2复合相变材料[J].材料工程,2015,43(9):94-102.
[15]张浩.基于RBF网络优化制备均匀粒度分布的微米级Si O2基相变调湿复合材料[J].材料工程,2017,45(8):24-29.
[16]张浩,黄新杰,宗志芳,等.基于吸附性能的生物质基多孔活性炭制备方案的响应面法优化[J].材料工程,2017,45(6):67-72.
[17]张浩.基于光催化性能的Cu-Ce/Ti O2湿性能[J].材料工程,2018,46(1):114-118.
[18]张浩,徐远迪,刘秀玉,等.基于正交设计与多元非线性回归分析Cu-Ce/Ti O2的光-湿性能[J].复合材料学报,2017,34(9):2093-2098.