钒-氮共掺杂含钛高炉渣光催化优化研究  

Photocatalytic process optimization study of vanadium and nitrogen co-doped Ti-bearing blast furnace slag

作　　者：霍红英 同艳维 Huo Hongying;Tong Yanwei(College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,Sichuan,China;Sichuan Provincial Research Center for Vanadium and Titanium Materials,Panzhihua University,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀枝花学院钒钛学院,四川攀枝花617000 [2]四川省钒钛材料工程技术研究中心,四川攀枝花617000

出　　处：《钢铁钒钛》2022年第1期74-79,共6页Iron Steel Vanadium Titanium

基　　金：攀枝花市综合资助项目(20180816);四川省大学生创新创业训练计划项目(S201911360037);四川省钒钛材料工程技术研究中心开放基金项目(2020-2FTGC-YB-02)。

摘　　要：为了实现含钛高炉渣的高附加值、合理的综合利用问题,利用其含TiO_(2)可制备光催化剂的特点,以攀钢含钛高炉渣为原料,以硝酸铵为氮源,以偏钒酸铵为钒源,采用高温固相烧结法掺入钒源,液相法掺入氮源的分步掺杂的方式制备了钒-氮共掺杂含钛高炉渣光催化材料,在紫外光下,以亚甲基蓝为模拟污染物,选取掺杂量、煅烧温度及煅烧时间为影响因素,评价其光催化活性;并用SEM、XRD手段对催化剂进行了表征。结果表明:钒、氮共掺杂对高炉渣的物相晶型影响较小,但能够增大其比表面积,提高其光催化活性;在煅烧温度300℃、N-Ti摩尔掺杂比30%、偏钒酸铵-TiO_(2)质量百分比45%、煅烧时间2 h时,制备的钒-氮共掺杂含钛高炉渣光催化剂降解率达到97.0%,比未掺杂之前提高了47.0%。The characteristics of the photocatalysts can be prepared using Ti-bearing blast furnace slag containing TiO_(2)to realize Ti-bearing blast furnace slag′s high added value and reasonable comprehensive utilization.Photocatalytic material derived from vanadium and nitrogen co-doped Ti-bearing blast furnace slag was produced by two-step doping approach(high-temperature solid-phase sintering method was used to adulterate vanadium source and liquid-phase method was used to adulterate nitrogen source).The raw material was Ti-bearing blast furnace slag produced from Pangang.At the same time,ammonium nitrate and ammonium metavanadate were carried out as the nitrogen source and the vanadium source,respectively.The effects of calcination temperature,doping amount and calcination time on the degradation rate of simulated pollutant methylene blue solution were investigated under ultraviolet light,and SEM and XRD characterized the photocatalytic activity.The results show that the codoping of vanadium and nitrogen has a negligible effect on the crystal structure of blast furnace slag but can increase the specific surface area of blast furnace slag and improve its photocatalytic activity.The N/Ti molar ratio is 30%and the mass percentage of ammonium metavanadate TiO_(2)was 45%when the calcination temperature was 300℃.In addition,the degradation rate of the prepared vanadium and nitrogen co-doped Ti-bearing blast furnace slag photocatalyst reached 97.0%when the calcination time was 2 h,which was 47.0%higher than that before doping.

关 键 词：含钛高炉渣 光催化剂 偏钒酸铵 硝酸铵 降解率 

分 类 号：X757[环境科学与工程—环境工程] TQ426[化学工程]