A New Cd(II)-Based Coordination Polymer for Efficient Photocatalytic Removal of Organic Dyes

Juanjuan Zhao; Zhuoyu Dang; Mohd Muddassir; Saleem Raza; Aiguo Zhong; Xiaoxiong Wang; Juncheng Jin

doi:10.3390/molecules28196848

A New Cd(II)-Based Coordination Polymer for Efficient Photocatalytic Removal of Organic Dyes

Molecules. 2023 Sep 28;28(19):6848. doi: 10.3390/molecules28196848.

Authors

Juanjuan Zhao¹, Zhuoyu Dang¹, Mohd Muddassir², Saleem Raza³, Aiguo Zhong⁴, Xiaoxiong Wang⁵, Juncheng Jin⁶

Affiliations

¹ School of Physics and Materials Engineering, Hefei Normal University, Hefei 230601, China.
² Department of Chemistry, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
³ College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China.
⁴ School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, China.
⁵ School of Materials and Environmental Engineering, Shenzhen Polytechnic University, Shenzhen 518055, China.
⁶ Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, West Anhui University, Liuan 237012, China.

Abstract

Coordination polymers (CPs) are a diverse class of multi-dimensional compounds that show promise as photocatalysts for degrading dyes in polluted water. Herein, a new 1D Cd(II)-based coordination polymer with the formula [Cd(bpyp)(nba)₂] (1) (bpyp = 2,5-bis(pyrid-4-yl)pyridine and Hnba = 4-nitrobenzoic acid) is synthesized and characterized. In 1, the two carboxyl groups of two different nba^- ligands show μ₂-η¹:η¹ and μ₁-η¹:η¹ coordination modes to connect the Cd^II centers and sit on either side of the chain along the b direction. The produced CP 1 was utilized as the photocatalyst in the process of the photodegradation of methyl blue (MB), methyl orange (MO), rhodamine B (RhB), and methyl violet (MV) dyes when exposed to UV light. The photocatalytic degradation activities of CP 1 were analyzed, and the results suggest that it exhibits an extraordinary efficiency in the degradation of MB, MV, MO, and RhB. RhB has a 95.52% efficiency of degradation, whereas MV has a 58.92% efficiency, MO has 35.44%, and MB has 29.24%. The photodecomposition of dyes is catalyzed mostly by •O₂^- and •OH^-, as shown by research involving the trapping of radicals.

Keywords: cadmium ions; coordination polymer; dyes degradation; mechanism.

Grants and funding

This study was funded by NSFC (52303339, 52002106); Anhui Talent Support Fund Project (gxyqZD2021127); the Introduction of High-level Talent Research Start-up fund project (2022rcjj45); Scientific Research Project of higher education in Anhui Province (2023AH051298, 2022AH052125); the Special Project in Key Areas of Guangdong Province (2022ZDZX4100) and the Science and Technology Project of Shenzhen Polytechnic (6020320001K0), Anhui Scientific Research and Innovation Team of Quality Evaluation and Improvement of Traditional Chinese Medicine (2022AH010090); and National College student’s innovation and entrepreneurship training program (S202210376133). Mohd. Muddassir extends his appreciation to the Deputyship for Research and Innovation, “Ministry of Education” in Saudi Arabia for funding this research (IFKSUOR3–442–2).