Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 615, Issue -, Pages 69-78Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.01.169
Keywords
Erbium oxide; Microwave absorption; Reduced graphene oxide; Strong weatherability; Superhydrophobicity
Categories
Funding
- National Natural Science Foun-dation of China [21908051, 21707031, 51703056, 21606081]
- Excellent Youth Project of Education Department of Hunan Pro-vince [18B111]
- Hunan Provincial Science and Technology Depart-ment [2018JJ3028, 2021JJ40231]
- State Key Laboratory of Crop Germplasm Innovation and Resource Utilization [17KFXN02]
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Engineering of erbium oxide-reduced graphene oxide composites with morphology-controlled chrysanthemum-like structures enables effective and durable absorption of electromagnetic microwaves in acidic or alkaline environments, offering promising applications in harsh outdoor conditions.
Engineering of electromagnetic wave absorbing materials featuring long-term durability in harsh outdoor environments (e.g., humidity, acid, and alkali conditions) is meaningful for their effective and sustainable implementation. Herein, morphology-controlled erbium oxide-reduced graphene oxide composites are designed for effective absorption of electromagnetic microwaves either in an acidic or alkaline environ -ment. The engineered nanocomposites with chrysanthemum-like structures display good impedance matching, moderate attenuation constant, exchange resonance, natural resonance, multiple reflections, and polarization relaxations, therefore exhibiting excellent microwave absorption capacity with a mini-mum reflection loss of-37.18 dB and an effective absorption bandwidth of 5.1 GHz. In addition, the chrysanthemum-like composite also displays self-cleaning property, strong weatherability, and acid-and alkali-resistance, enabling sustained electromagnetic wave absorbing performance even in corrosive conditions (1 M HCl, 1 M NaOH). The findings indicate that, through structural engineering, erbium oxide-reduced graphene oxide composites can serve as a promising microwave absorber in harsh outdoor environments. (c) 2022 Elsevier Inc. All rights reserved.
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