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采用柠檬酸络合法分别合成了B掺杂及B-Er共掺杂BiVO4可见光光催化剂,并对材料进行了XRD、SEM、EDS、BET和UV-vis等表征和分析。以光催化降解甲基橙溶液为探针反应,考察掺杂对BiVO4可见光催化活性的影响。结果表明:掺杂没有改变BiVO4晶型,掺杂前后均为单斜型,但B-Er共掺杂BiVO4的晶体粒径较单掺杂B和纯BiVO4减小。由UV-vis知,B-Er共掺杂BiVO4的光吸收强度大于单掺杂和纯BiVO4,光谱吸收红移程度大于单掺杂。B和Er共掺杂纳米BiVO4光催化剂产生协同效应,其光催化性能优于单掺杂B。当固定B为4%掺杂时,Er掺杂量为1%制备的B-Er共掺杂BiVO4,60 min对甲基橙的降解率达96.62%,较单掺杂B(37%)和纯样(20%)有明显提高。
B-doped and B-Er co-doped BiVO4 photocatalysts were synthesized by citric acid complexation method. The materials were characterized and analyzed by XRD, SEM, EDS, BET and UV-vis. Photocatalytic degradation of methyl orange solution as a probe reaction was investigated doping BiVO4 visible light catalytic activity. The results show that the doping of BiVO4 does not change the BiVO4 crystal form, and both of them are monoclinic before and after doping. However, the crystal size of BiVO4 co-doped with B-Er is smaller than that of single-doped B and pure BiVO4. From UV-vis knowledge, B-Er co-doped BiVO4 light absorption intensity greater than single-doped and pure BiVO4, spectral absorption redshift more than single-doped. B and Er co-doped nano-BiVO4 photocatalyst produce synergistic effect, its photocatalytic performance is better than single doping B. When B was fixed at 4%, the degradation rate of methyl orange in B-Er co-doped BiVO 4 with 1% Er doping amount for 60 min was 96.62% compared with that of single doping B (37%) and Pure sample (20%) has significantly improved.