碳纳米管/BiOBr复合材料的制备及其光催化性能

采用一步溶剂热的方法成功制备了微量多壁碳纳米管（MWCNT）修饰的溴氧化铋（BiOBr）复合材料，实现了对盐酸四环素（TC）的高效稳定降解.在MWCNT添加量为0.01mg（0.001wt%）时，制得的MWCNT/BiOBr催化剂具有较低的光致发光强度、较大的光电流和较小的EIS弧，显著提高了光催化效率.性能的显著提高是由于MWCNT的高捕获电子能力，它不仅能增强光吸收，而且还加速了电荷载流子的分离.通过自由基捕获实验和电子自旋共振（ESR）确定其主要活性组分为·O₂^-，并提出了提高复合材料光催化活性的可能机理.

Preparation and photocatalytic property of carbon nanotubes/BiOBr composite

Trace amount multi-walled carbon nanotubes (MWCNT) modified BiOBr were successfully fabricated via a one-step solvothermal method for efficient and stable degradation of tetracycline hydrochloride (TC). The MWCNT/BiOBr photocatalysts exhibited excellent photocatalytic with low PL intensity, high photocurrent, and small EIS arc at the optimal loading amount of MWCNT 0.01mg (0.001wt%), The significant enhancement of as-prepared MWCNT/BiOBr may be assigned to the high capture electron capability of MWCNT, which not only enhance the absorption of lights but also accelerate the separation of photogenerated charge carriers. Based on the trapping experiment and electron spin resonance (ESR), the possible mechanism of enhancing the photocatalytic activity for the composites was also proposed, in which the ·O₂^- was deemed to the primary active oxidants.