Preparation and Photocatalytic Properties of Niobium Pentoxide Photocatalyst

doi:10.19894/j.issn.1000-0518.230222

Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (3): 415-421.DOI: 10.19894/j.issn.1000-0518.230222

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Preparation and Photocatalytic Properties of Niobium Pentoxide Photocatalyst

Jing WANG(), Xi-Lan LI, Xiu-Fen GUO

School of Applied Chemistry and Materials，Zhuhai College of Science and Technology，Zhuhai 519040，China

Received:2023-08-24 Accepted:2023-11-29 Published:2024-03-01 Online:2024-04-09
Contact: Jing WANG
About author:swq57841@yeah.net
Supported by:
Guangdong Provincial University Research Platform Project(2022KQNCX145);the Innovation Ability Engineering Project of Zhuhai University of Science and Technology(2019XJCQ016)

Abstract

Abstract:

To improve the photocatalytic performance of niobium pentoxide photocatalyst in practical applications， a study on the preparation and photocatalytic performance of niobium pentoxide photocatalyst is proposed. Firstly， niobium pentoxide nanoparticles， niobium pentoxide nanorods， and niobium pentoxide nanowires were prepared， labeled as Nb₂O₅-1， Nb₂O₅-2， and Nb₂O₅-3， and exposed to rhodamine B solution and methylene blue solution， respectively. Then， the samples before and after treatment were characterized using an X-ray diffractometer to observe the changes in their crystal structure and morphology； Observe the sample using a transmission electron microscope to analyze its morphology， size， dispersibility， and adsorption of organic dyes； Use a spectrometer for UV visible absorption spectroscopy analysis to observe the adsorption and band structure changes of organic dyes on the sample surface. Finally， evaluate the photocatalytic performance of the sample in different organic dye environments by irradiating it with a certain light source and monitoring parameters such as the degradation rate of organic dyes. The experimental results show that Nb₂O₅-2 and Nb₂O₅-3 have a high degree of crystallization and an orthogonal phase structure， and have superior photocatalytic performance and stability； The characterization particles of Nb₂O₅-2 and Nb₂O₅-3 samples are more obvious， with a high degree of agglomeration between the particles. The nanocrystals exhibit a metastable phase state in high temperature environments and exhibit higher photocatalytic activity. When Nb₂O₅-2 and Nb₂O₅-3 are in methylene blue solution and rhodamine B solution， respectively， they can effectively reduce the absorbance of the solution. Nb₂O₅-2 has the highest catalytic degradation rate and strongest photocatalytic effect on methylene blue solution and rhodamine solution.

Key words: Niobium pentoxide, Photocatalyst, Rhodamine B, Methylene blue

CLC Number:

O614

Jing WANG, Xi-Lan LI, Xiu-Fen GUO. Preparation and Photocatalytic Properties of Niobium Pentoxide Photocatalyst[J]. Chinese Journal of Applied Chemistry, 2024, 41(3): 415-421.

Figures/Tables 8

Fig.1 XRD spectra of Nb2O5-1 （a）， Nb2O5-2 （b） and Nb2O5-3 （c）

Fig.2 XPS image of Nb2O5-1 （A）， Nb2O5-2 （B） and Nb2O5-3 （C）

Fig.3 SEM image of Nb2O5-1 （A）， Nb2O5-2 （B） and Nb2O5-3 （C）

Fig.4 Photocatalytic absorption spectra of Nb2O5-1 in methylene blue solution （A） and rhodamine B solution （B）

Fig.5 Photocatalytic absorption spectra of Nb2O5-2 in methylene blue solution （A） and rhodamine B solution （B）

Fig.6 Photocatalytic absorption spectra of Nb2O5-3 in methylene blue solution （A） and rhodamine B solution （B）

Table 1 Degradation rate of different organic dye solutions by different Nb2O5

Solution	Catalytic time/min	Degradtion rate/%
Solution	Catalytic time/min	Nb₂O₅?1	Nb₂O₅?2	Nb₂O₅?3
Methylene blue solution	30	8.24	15.9	14.7
	60	10.9	31.7	29.7
	90	13.4	44.5	42.5
	120	15.7	60.7	55.9
	150	16.1	81.4	79.4
	180	17.5	94.2	85.6
Rodamine B solution	30	6.99	13.9	11.5
	60	8.24	28.7	24.7
	90	11.4	42.9	37.6
	120	12.4	59.8	46.5
	150	14.5	75.8	69.7
	180	16.1	83.4	78.6

Fig.7 Degradation curves of pollutants in methylene blue solution （A） and rhodamine B solution （B） of three samples

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Preparation and Photocatalytic Properties of Niobium Pentoxide Photocatalyst

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