SYNTHESIS, STUDY ON THE OPTICAL AND ELECTRICAL PROPERTIES OF COBALT-DOPED HOLMIUM ORTHOFERRITE NANOPARTICLES

Anh Tiến Nguyễn 1, , Hoang Huy Nguyen2, Thi Thu Trang Nguyen3, Thi Viet Hoa Le4, Viet Duc Phung5, Thuy An Nguyen5, Tuan Loi Nguyen5
1 Khoa Hoá học, trường Đại học Sư phạm Tp. Hồ Chí Minh
2 Trường Đại học Sư Phạm TP. Hồ Chí Minh
3 Trường Đại học Sư Phạm TP Hồ Chí Minh
4 Trường Đại học Sư phạm TP Hồ Chí Minh
5 Đại học Duy Tân, Đà Nẵng

Main Article Content

Abstract

In this study, cobalt-doped holmium orthoferrite nanoparticles (HoFe1–xCoxO3 with x = 0; 0.1 and 0.2 in theoretically) were successfully synthesized by a simple co-precipitation method. The single-phase HoFe1–xCoxO3 nanocrystals formed after annealing at 850 °C for 1 hour possess a size of about 50–70 nm. The cobalt-doped holmium orthoferrite nanoparticles exhibit a large light absorption in both ultraviolet and visible regions. The band gap energy of the HoFe1–xCoxO3 materials decrease gradually with increasing cobalt doping concentration (Eg = 1.92–1.71 eV). The HoFe1–xCoxO3 electrodes present their suitability for using as anode materials for lithium-ion batteries. Specifically, the CHFO_0.10 (x = 0.1) electrode delivered a charge capacity of 288.97 mAh·g–1 after 70 cycles, corresponding to a capacity retention of 126.42% compared to the first cycle.

Article Details

Author Biography

Nghiên cứu sinh Hoang Huy Nguyen, Trường Đại học Sư Phạm TP. Hồ Chí Minh

Nghiên cứu sinh trường Đại học Sư Phạm TP. Hồ Chí Minh

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