TiO_(2)/(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4)纳米复合材料的光催化制氢性能研究  

Photocatalytic Hydrogen Production Performance of TiO_(2)/(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_3O_(4) Nanocomposites

作　　者：谢云凤 靳长清[1] 姚海刚 XIE Yunfeng;JIN Changqing;YAO Haigang(School of Materials and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China;Shaanxi Huaxing Electronics Group Co.,Ltd.,Xianyang 712099,China)

机构地区：[1]西安工业大学材料与化工学院,西安710021 [2]陕西华星电子集团有限公司,咸阳712099

出　　处：《西安工业大学学报》2024年第6期714-723,共10页Journal of Xi’an Technological University

基　　金：陕西省自然科学基础研究计划项目(2019JM414)。

摘　　要：为了解决TiO_(2)纳米材料空穴复合率高以及光稳定性不好等问题,采用溶液燃烧法首次成功制备(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4)高熵氧化物纳米颗粒;然后再利用固相反应法制备TiO_(2)/(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4)纳米复合材料,并将其应用于光催化制氢。结果表明,在TiO_(2)和(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4)摩尔比为30时,光催化制氢速率达到最大。该纳米复合材料的光催化制氢速率达到了1 304.5μmol·h^(-1)·g^(-1),分别是(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4)纳米材料和TiO_(2)纳米颗粒光催化制氢速率的85.3和1.98倍。复合材料具有更高光催化制氢速率的原因在于:(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4)和TiO_(2)之间形成了异质结,使得复合材料具有更高的光生载流子分离率,导致光催化制氢性能得到了提升。经过12 h的光辐照,该纳米复合材料的制氢速率衰减仅为11%,而在同样条件下,TiO_(2)纳米颗粒的制氢速率衰减高达81.7%。证实了该纳米复合材料比TiO_(2)具有更高的光稳定性。The study aims to solve the problems that TiO_(2) nanomaterials are high in hole complexation rate and poor in photostability.The solution combustion method was used for the successful preparation of(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3O4) high-entropy oxide nanoparticles for the first time.And then solid-phase reaction method was used to prepare TiO_2/(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3O4) nanocomposite,which was used in the photocatalytic hydrogen production.The results show that when the molar ratio of TiO_(2) to(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4) is 30,its rate of photocatalytic hydrogen production reaches a maximum of 1 304.5 μmol·h^(-1)·g^(-1),which is 85.3 and 1.98 times higher than the rates of(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_4)_(3)O_(4) nanomaterial and TiO_(2) nanoparticles,respectively.The higher photocatalytic hydrogen production rate is attributed to the formation of a heterojunction between(Ti_(0.25)Mn_(0.25)Co_(0.25)Ni_(0.25)Zn_(0.25))_(3)O_(4) and TiO_2,which makes the composite have a higher photogenerated carrier separation rate,enhancing its photocatalytic hydrogen production performance.The photostability test shows that after 12 h of light irradiation,the hydrogen production rate of the nanocomposite decreases by only 11%,while that of TiO_(2) nanoparticles decreases by as high as 81.7%,indicating that the nanocomposite has higher photostability than TiO_(2) does.

关 键 词：高熵氧化物 TiO_(2) 光催化制氢 异质结 

分 类 号：TQ426[化学工程]