Preparation of Co2+@Zirconium-phosphonate Composite and Its Catalytic Properties on Degradation of Safranin T

doi:10.7503/cjcu20250240

Abstract

Abstract:

A kind of composite catalyst TTFA@Co²⁺@ZrDP was prepared by coordination among Co²⁺， ZrDP（a kind of zirconium phosphonate with 1，4，7，10-tetraazaheterocyclic ring in skeleton） as carrier and TTFA（2-thiophene formyl trifluoroacetone） as chelating ligand. The catalytic activity of the composite was studied in the oxidation degradation reaction of safranin T in the presence of peroxymonosulfate as oxidant. The results indicate that the catalytic activity of TTFA@Co²⁺@ZrDP is closely related to its particle size， the content and dispersion of Co²⁺ supported， and TTFA is found to promote the transfer of electrons during the catalytic reaction and enhance the catalytic ability of the Co²⁺. 100% of Safranin T could be degraded by TTFA@Co²⁺@ZrDP under certain conditions in the presence of peroxymonosulfate and the catalyst has good reusability.

Key words: Zirconium phosphonate, Safranin T, Peroxymonosulfate, Degradation

CLC Number:

O643

TrendMD:

HOU Qingzi, WANG Kejing, LI Chunchuang, SHAO Qian, HAO Haijun, XU Qinghong. Preparation of Co²⁺@Zirconium-phosphonate Composite and Its Catalytic Properties on Degradation of Safranin T[J]. Chem. J. Chinese Universities, 2025, 46(11): 20250240.

Figures/Tables 12

References 26

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Sample	Specific surface area/（m²·g^-1）	Pore volume/（cm³·g^-1）	Average pore size/nm
Co²⁺@ZrDP	19.6815	0.1018	1.5954
TTFA@Co²⁺@ZrDP⁃1	7.7243	0.0425	1.3144
TTFA@Co²⁺@ZrDP⁃2	63.5164	0.3362	1.5519

Sample	Specific surface area/（m²·g^-1）	Pore volume/（cm³·g^-1）	Average pore size/nm
Co²⁺@ZrDP	19.6815	0.1018	1.5954
TTFA@Co²⁺@ZrDP⁃1	7.7243	0.0425	1.3144
TTFA@Co²⁺@ZrDP⁃2	63.5164	0.3362	1.5519

Time/min	Degradation rate（%）
Time/min	Cycle 1	Cycle 2	Cycle 3	Cycle 4	Cycle 5	Cycle 6	Cycle 7
0	0	0	0	0	0	0	0
5	99.77	86.87	83.26	82.36	72.18	32.49	28.53
10	99.89	98.26	98.22	96.28	95.46	50.71	46.49
15	99.91	98.39	98.39	98.31	98.18	81.96	69.13
20	99.92	98.30	98.35	98.35	98.30	94.52	87.04
25	99.92	98.39	98.35	98.27	98.35	98.89	96.16
30	99.95	98.39	98.35	98.35	98.35	99.87	98.78

Time/min	Degradation rate（%）
Time/min	Cycle 1	Cycle 2	Cycle 3	Cycle 4	Cycle 5	Cycle 6	Cycle 7
0	0	0	0	0	0	0	0
5	99.77	86.87	83.26	82.36	72.18	32.49	28.53
10	99.89	98.26	98.22	96.28	95.46	50.71	46.49
15	99.91	98.39	98.39	98.31	98.18	81.96	69.13
20	99.92	98.30	98.35	98.35	98.30	94.52	87.04
25	99.92	98.39	98.35	98.27	98.35	98.89	96.16
30	99.95	98.39	98.35	98.35	98.35	99.87	98.78

Preparation of Co²⁺@Zirconium-phosphonate Composite and Its Catalytic Properties on Degradation of Safranin T

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