Xu Haoyang, Zheng Yage, Shen Yue, Mu Chaoqun, Zhang Zhiqiang, He Zhixian, Wang Yao, Xue Juanqin, Zhang Liang
College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, People's Republic of China.
School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, People's Republic of China.
Int J Biol Macromol. 2025 Jan;286:138371. doi: 10.1016/j.ijbiomac.2024.138371. Epub 2024 Dec 5.
In this work, the photocatalyst BiOCOOH/BiYO/Chitosan (CS) was prepared by using CS as the carrier and adsorbent. The performance of the material was studied through the photocatalytic degradation of tetracycline (TC) in water. Theoretical calculations and experiments demonstrate that the formation of BiOCOOH/BiYO heterojunctions improves the separation of photogenerated carriers and the absorption of visible light by the material. The introduction of CS improves the difficulties in material recovery, demonstrating exceptional degradation ability for TC under the action of adsorption and photocatalysis. Adsorption kinetics studies indicate that the adsorption of TC by BiOCOOH/BiYO/CS fits the pseudo-second-order model better, while the adsorption at different concentrations of TC is more suitably described by the Freundlich isotherm model. The synthesis of BiOCOOH/BiYO/CS was confirmed by the analysis of XRD, XPS, and FTIR. UV-vis DRS showed that the synthesis of BiOCOOH/BiYO/CS broadened the range of light absorbed by the material. The testing results of PL and transient photocurrent density indicate that BiOCOOH/BiYO exhibits a higher efficiency in separating photogenerated charge carriers. After 5 cycles of reuse, the degradation efficiency can still reach 90 % of the initial efficiency, indicating that CS-based photocatalytic composite catalysts have practical application potential in the field of water pollution treatment.
在本工作中，以壳聚糖（CS）为载体和吸附剂制备了光催化剂BiOCOOH/BiYO/壳聚糖（CS）。通过光催化降解水中的四环素（TC）来研究该材料的性能。理论计算和实验表明，BiOCOOH/BiYO异质结的形成提高了光生载流子的分离效率以及材料对可见光的吸收。CS的引入改善了材料回收的难题，表明在吸附和光催化作用下对TC具有优异的降解能力。吸附动力学研究表明，BiOCOOH/BiYO/CS对TC的吸附更符合准二级模型，而不同浓度TC下的吸附更适合用Freundlich等温线模型描述。通过XRD、XPS和FTIR分析证实了BiOCOOH/BiYO/CS的合成。紫外可见漫反射光谱（UV-vis DRS）表明，BiOCOOH/BiYO/CS的合成拓宽了材料吸收光的范围。光致发光（PL）和瞬态光电流密度的测试结果表明，BiOCOOH/BiYO在分离光生电荷载流子方面表现出更高的效率。经过5次重复使用循环后，降解效率仍可达到初始效率的90%，表明基于CS的光催化复合催化剂在水污染处理领域具有实际应用潜力。
