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材料研究学报  2026, Vol. 40 Issue (5): 321-332    DOI: 10.11901/1005.3093.2025.187
  光催化专题 本期目录 | 过刊浏览 |
Bi4O5I2/Bi7O9I3 异质结光催化剂对水中环丙沙星的降解性能
于瀚博1,2,3, 胡妍1, 徐婷婷1,2, 张一文1, 张弛1,2, 谭杰文1, 李永翔1,2, 王晗4()
1.长沙理工大学水利与海洋工程学院 长沙 410114
2.洞庭湖水环境治理与生态修复湖南省重点实验室 长沙 410114
3.长沙理工大学土木与环境工程学院 长沙 410114
4.中南大学冶金与环境学院 长沙 410083
Degradation Performance of Heterojunction Photocatalyst Bi4O5I2/Bi7O9I3 for Ciprofloxacin Solution
YU Hanbo1,2,3, HU Yan1, XU Tingting1,2, ZHANG Yiwen1, ZHANG Chi1,2, TAN Jiewen1, LI Yongxiang1,2, WANG Han4()
1.School of Hydraulic and Ocean Engineering, Changsha University of Science & Technology, Changsha 410114, China
2.Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
3.School of Civil and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
4.School of Metallurgy and Environment, Central South University, Changsha 410083, China
引用本文:

于瀚博, 胡妍, 徐婷婷, 张一文, 张弛, 谭杰文, 李永翔, 王晗. Bi4O5I2/Bi7O9I3 异质结光催化剂对水中环丙沙星的降解性能[J]. 材料研究学报, 2026, 40(5): 321-332.
Hanbo YU, Yan HU, Tingting XU, Yiwen ZHANG, Chi ZHANG, Jiewen TAN, Yongxiang LI, Han WANG. Degradation Performance of Heterojunction Photocatalyst Bi4O5I2/Bi7O9I3 for Ciprofloxacin Solution[J]. Chinese Journal of Materials Research, 2026, 40(5): 321-332.

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摘要: 

用溶剂碱度调控法和煅烧制备一种富铋型碘氧化铋异质结光催化剂(Bi4O5I2/Bi7O9I3, Bi4/Bi7)并进行活性物种捕获实验、表征其物相和光电化学性能,研究了其对水中环丙沙星(CIP)的降解性能。结果表明,结构优化的Bi4/Bi7-3异质结光催化剂对CIP的吸附和光降解性能优异,在60 min内其吸附率为88.1%,在其后的30 min内使CIP完全降解。Bi4/Bi7具有由纳米颗粒和纳米片共团聚而成的微球结构,较大的比表面积为催化反应提供了丰富的活性位点,交错排列的能带形成的II型异质结加速了电荷转移。空穴(h+)是Bi4/Bi7异质结降解CIP的主要活性物质,超氧自由基(⋅O2-)和羟基自由基(⋅OH)几乎不参与反应,使其在缺氧环境或自由基竞争环境中也具有较高的活性。

关键词 : 复合材料,  Bi4O5I2/Bi7O9I3,  光催化,  环丙沙星    
Abstract:

A novel heterojunction photocatalyst of Bi-rich bismuth oxyiodides (Bi4O5I2/Bi7O9I3) was synthesized via regulation of the alkalinity of solvent and followed by calcination, while its degradation performance was examined for ciprofloxacin (CIP) solution. The results showed that the structurally optimized composite heterogeneous catalyst Bi4O5I2/Bi7O9I3-3 exhibits excellent adsorption and photodegradation performance for CIP 20 mg/L solution. Its adsorption rate reaches 88.1% in dark conditions for 60 min, and then subsequently under a simulated sunlight irradiation for 30 min, the CIP is completely degraded. The Bi4O5I2/Bi7O9I3 presents a microsphere morphology composed of nanoparticles and nanosheets. Meanwhile, its large specific surface area provides abundant active sites for the catalytic reaction, and the formed type-II heterojunction with band cross-arrangement can accelerate the charge transfer. Furthermore, the holes (h+) are the main active substances for the degradation of CIP in the heterojunction Bi4O5I2/Bi7O9I3, while superoxide free radicals (⋅O2-) and hydroxyl free radicals (⋅OH) hardly participated in the reaction, thus making them high activity even in an oxygen-depleted environment or in an environment with free radical competition.

Key words: composite    Bi4O5I2/Bi7O9I3    photocatalysis    ciprofloxacin
收稿日期: 2025-06-03     
ZTFLH:  TB331  
基金资助:国家自然科学基金(52400202);国家自然科学基金(22306204);湖南省教育厅资助科研项目(24C0149);湖南省大学生创新创业训练计划项目(S202510536125)
通讯作者: 王晗,讲师,han.wang@csu.edu.cn,研究方向为新污染物治理
Corresponding author: WANG Han, Tel: 13548699620, E-mail: han.wang@csu.edu.cn
作者简介: 于瀚博,男,1995年生,博士
图1  样品的制备流程
图2  Bi4/Bi7-3、Bi4-S1、Bi4-S2、SP和Bi7的XRD谱
图3  Bi4/Bi7-3的XPS谱
图4  前驱体SP和Bi4/Bi7-3的SEM照片以及Bi4/Bi7-3中的元素映射图
图5  Bi4/Bi7-3复合物和Bi4-S1单体的TEM照片
图6  Bi4/Bi7-3、Bi4-S1和Bi4-S2的N2吸附-脱附图
图7  不同样品的紫外-可见吸收光谱和Tauc Plot图
图8  制备条件不同的样品在可见光下对CIP的降解和吸附
PhotocatalystConcentration / mg·L-1Dosage / g·L-1Time / minRemoval / %Light sourceReference
Bi-Bi2WO6/BiOI2018096.0300 W XL (λ ≥ 420 nm)[23]
BiOI/sulfated TiO22016085.6150 W LED (λ = 420 nm)[24]
Bi4O5I2/g-C3N4250.59066.8300 W XL (λ ≥ 420 nm)[25]
Gd-Bi4O5I2100.412094.5300 W XL (λ = 420 nm)[26]
UiO-66-NH2/Bi7O9I3100.59096.9300 W XL (λ ≥ 420 nm)[27]
Bi7O9I3-erythritol200.346076.8300 W XL (Full spectra)[28]
CuS/Bi7O9I3200.66095.21 kW XL (λ ≥ 420 nm)[29]
Bi4O5I2/Bi7O9I3200.530100.0300 W XL (λ ≥ 420 nm)This study
表1  铋系光催化剂降解CIP性能的对比
图9  共存离子和水体对CIP降解的影响
图10  Bi4/Bi7-3对CIP降解的循环实验结果以及用过的催化剂的电镜照片和XRD谱
图11  催化剂的瞬态光电流、交流阻抗和瞬态荧光光谱
图12  催化剂的Mott-Schottky图
图13  捕获剂对CIP降解的影响以及材料的TOC去除效果
图14  光催化降解CIP的机理
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