| 1 | 利用铁、铜和硫掺杂TiO_(2)有效光催化转化甲酸显示文摘采用简单的溶胶-凝胶法在TiO_(2)中复合加入铜离子或铁离子和硫酸离子,并研究其甲酸光催化转化效果。通过X射线衍射(XRD)、N_(2)物理吸附(BET比表面积测量)、扫描和透射电子显微镜(SEM和TEM)、UV-Vis漫反射光谱(DRS)和X射线光电子能谱(XPS)对不同光催化剂的结构和形貌进行表征,以确定材料的理化性能与其对甲酸氧化的光催化效率之间的关系。结果显示,添加不同金属离子将导致催化剂之间的重要差异。硫酸化TiO_(2)/Cu(1%Cu)具有最佳的光催化效果,仅在5 min内就可获得100%的甲酸转化率。通过复合添加铜离子和硫酸可使催化剂获得良好的物理化学特性,使其在光催化反应中表现出优越的性能。 | ZOUHEIR Morad TANJI Karim NAVIO Jose Antonio HIDALGO María Carmen JARAMILLO-PAEZ Cesar Augusto KHERBECHE Abdelhak | 2022 | Journal of Central South University2022，29，11： | 3 |
| 2 | Hydrometallurgy two stage process for preparation of (Nd,La,Ce)_(2)O_(3) from end-of-life NiMH batteries显示文摘The present work aims to investigate the recovery of light rare earth elements(LREEs) oxides from end-oflife NiMH batteries using a hydro metallurgical process followed by effective precipitation.The operational leaching parameters such as phosphoric acid concentration,temperature,and the solid-liquid ratio were first optimized by Box-Behnken design.The results reveal that under optimum conditions([H_(3)PO_(4)]=2 mol/L,T=80℃,and S/L=1:10 g/mL) the leaching efficiencies of Ni,Co reach 98.1% and99.3%.While La,Ce,and Nd elements remain in the leaching residue as(La,Ce,Nd)PO_(4) with yields of 98.2%,98.6%,and 99.6% for La,Ce,and Nd,respectively.Afterward,the(La,Ce,Nd)PO_(4) is leached with HCl acid,then the rare earth oxalate was precipitated using oxalic acid at a pH of 1.8 and then the product was calcined at 800℃ for 2 h in order to synthesize the(Nd,La,Ce)_(2)O_(3).The analysis using scanning electron microscopy(SEM) coupled with energy dispersive X-ray spectroscopy(EDX) confirms the homogeneity of(Nd,La,Ce)_(2)O_(3) particles that have two morphologies,i.e.,flower and sticks with a particle size between 3and 6 μm.The unit cell parameters of(Nd,La,Ce)_(2)O_(3) were calculated after Rietveld refinement of the XRD patterns,in the space group of Fm-3m are a=b=c=0.57921 nm and the volume equal to 0.194322 nm^(3). | Karim Tanji Khalid Ouzaouit Mohamed Belghiti Isam Lamsayety Hakim Faqir Intissar Benzakour | 2024 | Journal of Rare Earths2024，42，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员