CuO nanoparticles decorated on hydroxyapatite/ferrite magnetic support: photocatalysis, cytotoxicity, and antimicrobial response

被引:27
作者
Paris, Elaine Cristina [1 ]
Donizette Malafatti, Joao Otavio [1 ,2 ]
Moreira, Ailton Jose [2 ]
Santos, Lilian Cruz [1 ,2 ]
Sciena, Camila Rodrigues [1 ,2 ]
Zenatti, Alessandra [3 ]
Escote, Marcia Tsuyama [3 ]
Mastelaro, Valmor Roberto [4 ]
Rincon Joya, Miryam [5 ]
机构
[1] Embrapa Instrumentacao, Nanotechnol Natl Lab Agr LNNA, 15 Novembro St 1452, BR-13560970 Sao Carlos, SP, Brazil
[2] Univ Fed Sao Carlos, Dept Chem, Rod Washington Luiz,Km 235, BR-13565905 Sao Carlos, SP, Brazil
[3] Fed Univ ABC, Ctr Engn Modeling & Appl Social Sci, Ave Estados 5001, BR-09210580 Santo Andre, SP, Brazil
[4] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13566590 Sao Carlos, SP, Brazil
[5] Univ Nacl Colombia, Fac Ciencias, Dept Fis, Carrera 30 Calle 45-03, Bogota 111321, Colombia
关键词
Copper oxide; Magnetic nanocomposite; Photocatalyst; Cytotoxicity; Bactericidal; FE3O4-AT-CUO CORE-SHELL; MOF-BASED MATERIALS; METHYLENE-BLUE; DEGRADATION; PHOTOLUMINESCENCE; NANOCOMPOSITE; CATALYSTS; TOXICITY; HYDROPHOBICITY; PERFORMANCE;
D O I
10.1007/s11356-021-18263-y
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Photocatalysts supported in magnetic nanocomposites for application in environmental remediation processes have been evaluated for removing contaminants due to easy recovery and low toxicity to the ecosystem. In this work, copper oxide (CuO) nanoparticles with photocatalytic properties were decorated on magnetic support constituted by hydroxyapatite (HAP) and ferrite to achieve efficiency in contaminated water remediation under visible light irradiation. First, nanomaterials were obtained by precipitation route, allowing fast and straightforward synthesis. Then, CuO nanoparticles with 6 nm diameter were efficiently decorated on magnetic support (25 nm), showing a high ability to absorb visible light irradiation (bandgap) to promote electronic transition and charge separation. Under visible irradiation, CuO promotes the H2O2 reduction in the conduction band (BC) to form hydroxyl radicals ((OH)-O-center dot), which are responsible for rhodamine B (RhB) dye degradation (> 90% in 60 min). Magnetic hysteresis assays confirmed the magnetic properties of HAP/ferrite support, which enabled the recovery and reuse of the magnetic photocatalyst efficiently up to 3 cycles. Due to low Cu2+ leaching after the photocatalytic application stage, cytotoxicity assay for the Allium cepa seeds did not exhibit abnormal cells other than those commonly found. Furthermore, the CuO-decorated nanoparticles showed bactericidal activity against S. aureus (Gram-positive) and E. coli (Gram-negative) microorganisms, being more significant for the first one. Thus, the developed nanocomposite of CuO nanoparticles decorated on the magnetic support surface showed to be a complete system for water remediation, acting in contaminant degradation under visible light irradiation and bactericidal control with environmentally friendly characteristics.
引用
收藏
页码:41505 / 41519
页数:15
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