CAJ | 학술논문

将具有光催化潜力的Ti、Ni金属元素引入类水滑石(HTlcs)结构中,采用共沉淀法制备了一系列Ni/Ti二元类水滑石,焙烧后HTlcs前体材料转变为Ni/Ti复合氧化物(Ni/Ti-LDO),并用作光催化剂进行甲基橙光降解实验.用XRD、SEM、TG-DTA、元素分析等方法对产物的结构、形貌和组成进行表征,考察了金属离子配比、焙烧温度、催化剂用量等因素对催化甲基橙光降解的影响,并与通用TiO2光催化剂催化性能进行对比.实验结果表明,在相同催化剂浓度条件下,Ni/Ti金属摩尔比为4:1的Ni/Ti-LDO具有比TiO2更优越的催化降解甲基橙的性能.当催化剂前体Ni/Ti金属摩尔比为4:1,焙烧温度为450℃、催化剂用量为0.9 g?L?1时,浓度为5×10?5 mol?L?1的甲基橙溶液于300 W紫外光照30 min, Ni/Ti-LDO对甲基橙的催化降解率可达98%以上.
장구유광최화잠력적Ti、Ni금속원소인입류수활석(HTlcs)결구중,채용공침정법제비료일계렬Ni/Ti이원류수활석,배소후HTlcs전체재료전변위Ni/Ti복합양화물(Ni/Ti-LDO),병용작광최화제진행갑기등광강해실험.용XRD、SEM、TG-DTA、원소분석등방법대산물적결구、형모화조성진행표정,고찰료금속리자배비、배소온도、최화제용량등인소대최화갑기등광강해적영향,병여통용TiO2광최화제최화성능진행대비.실험결과표명,재상동최화제농도조건하,Ni/Ti금속마이비위4:1적Ni/Ti-LDO구유비TiO2경우월적최화강해갑기등적성능.당최화제전체Ni/Ti금속마이비위4:1,배소온도위450℃、최화제용량위0.9 g?L?1시,농도위5×10?5 mol?L?1적갑기등용액우300 W자외광조30 min, Ni/Ti-LDO대갑기등적최화강해솔가체98%이상.
The Ti, Ni metal elements with photocatalytic potential were introduced into Hydrotalcite-Like Compounds (HTlcs) to obtain photocatalytic materials. A series of Ni/Ti-HTlcs with various Ni/Ti ratios were prepared by co-precipitation method. After calcination, the HTlcs precursors were converted to Ni/Ti layered double oxides (Ni/Ti-LDO), which were used as catalysts for the photo-degredation of methyl orange. XRD, SEM, TG-DTA and element analysis were used to characterize the structure, morphology and compostion of the Ni/Ti-LDO. Effects of Ni/Ti molar ratio, calcination temperature and catalyst dosage of Ni/Ti-LDO on the degradation ratio of methyl orange were investigated. Experimental results show that the Ni/Ti-LDO with Ni/Ti molar ratio of 4:1 has superior catalytic property to the same amount of common TiO2 photocatalyst. Using the Ni/Ti-LDO with Ni/Ti ratio of 4:1, calcination temperature of 450℃ and catalyst concentration of 0.9 g?L?1, more than 98%of methyl orange (5×10?5 mol?L?1) can be degraded after the ultravoilet radiation time of 30 min at 300 W.