摘要
以Co(NO_(3))_(2)·6H_(2)O为钴源通过水热法制备了一种可见光驱动的Co/BiVO_(4)光催化剂。扫描电子显微镜和X射线衍射分析表明Co掺杂影响了材料的微观形貌,特征峰峰形尖锐半峰宽窄,结晶度高;X射线光电子能谱分析结果表明,钴以Co^(3+)和Co^(2+)同时存在于Co/BiVO_(4),Co掺杂后材料吸收边缘发生了移动,适量掺杂钴可缩小可见光带隙以及拓宽可见光的响应范围,随着Co掺入量的增加,Co/BiVO_(4)对蓝藻光合活性的Fv/Fm胁迫在40min内抑制率可达到93.3%,BiVO_(4)和Co/BiVO_(4)对Y(Ⅱ)的抑制率相较于Fv/Fm更大。自由基捕获实验表明,·OH作为主要活性物质对藻细胞Fv/Fm和Y(Ⅱ)产生了抑制,ht作为活性物质的抑制效果最小,·O^(2-)抑制作用次之。
A visible-light-driven Co/BivO_(4) photocatalyst was synthesized via a hydrothermal method using Co(NO_(3))_(2)·6H_(2)O as the cobalt source.SEM and XRD analyses revealed that Co doping influences the micromorphology of the material,resulting in sharp diffraction peaks with narrow full width at half maximum(FWHM)and high crystallinity.XPS results confirmed the coexistence of Co^(3+) and Co^(2+)in the Co/BiVO_(4) structure.After Co doping,the absorption edge of the material shifted,and appropriate doping levels were found to narrow the visible-light bandgap while broadening the visible-light response range.With increasing Co doping content,the inhibition rate of Co/BiVO_(4) on the Fv/Fm stress in cyanobacteria reached 93.3%within 40 minutes.Both BiVO_(4) and Co/BiVO_(4) exhibited higher inhibition rates toward Y(Ⅱ)than toward Fv/Fm.Radical trapping experiments demonstrated that·O^(2-) acts as the primary active species responsible for the inhibition of Fv/Fm and Y(Ⅱ)in algal cells,while h showed the least inhibitory effect,and·OH exhibited a moderate contribution.
作者
宋卫军
谢妤
陈钱浩
樊艾妮
SONG Weijun;XIE Yu;CHEN Qianhao;FAN Aini(Fujian Provincial Key Laboratory of Eco-Industrial Green Technology,Wuyi University,Wuyishan 354300;COllege of Ecology and R esources Engineering,Wuyi University,Wuyishan 354300,China;College of Environment and Resources,Fujian Normal University,Fuzhou 350007,China)
出处
《安阳工学院学报》
2025年第6期44-50,共7页
Journal of Anyang Institute of Technology
基金
福建省自然科学基金(2020J01417)。
