Enhanced Heterogeneous Catalytic Activity of Peroxymonosulfate for Rhodamine B Degradation via a Co^II-Based Metal–Organic Framework

Abstract

A stable metal–organic framework with the formula {[Co(BBZB)(IPA)]·H2O} n (JXUST-23, BBZB = 4,7-bis(1H-benzimidazole-1-yl)-2,1,3-benzothiadiazole and H2IPA = isophthalic acid) was constructed by incorporating Co2+ ions and two conjugated ligands under solvothermal conditions. JXUST-23 takes a dinuclear cluster-based layer structure with a porosity of 2.7%. In this work, JXUST-23 was used to activate peroxymonosulfate (PMS) to degrade rhodamine B (RhB), a difficult-to-degrade pollutant in water. Compared with pure PMS or JXUST-23, the JXUST-23/PMS system displays the best degradation ability of RhB in neutral solution. When the mass ratio of JXUST-23 to PMS was 2:3, 99.72% of RhB (50 ppm) was removed within 60 min, and the reaction rate was 0.1 min–1. Furthermore, free radical quenching experiments show that SO4 •– was the main free radical during the process of RhB degradation. In addition, JXUST-23 exhibits good reusability for the degradation of the organic dye RhB, making it a potential candidate for environmental remediation.

Co-based MOF as an efficient catalyst by peroxymonosulfate activation for degradation of tetracycline: synthesis and performance

“…2b, the spectrum of C 1s was fitted into three peaks, whose binding energies were 284.76 eV, 286.21 eV and 288.40 eV, corresponding to the C–C, C–N and CO bonds, respectively. 23 In the N 1s spectrum, the peaks located at 399.64 eV corresponded to the C–N or CN bond and 401.12 eV corresponded to the Co–N bond. 24 In the O 1s spectrum in Fig.…”

Cu/Co Bimetallic Carbon Catalyst as a Highly Efficient Promoter for Reactive Dyes Degradation with PMS

“…Dyes in wastewater can cause water discoloration, reduce transparency, exert toxic effects on aquatic organisms, and disrupt aquatic ecosystems. 28,29 Additionally, dyes may leach into the soil, affecting fertility, plant growth, and soil quality. 30,31 Moreover, colored wastewater containing dyes may infiltrate groundwater, contaminating groundwater resources and posing a threat to drinking water safety.…”

“…However, their persistent nature and potential toxicity pose serious environmental issues when discharged into the environment. Dyes in wastewater can cause water discoloration, reduce transparency, exert toxic effects on aquatic organisms, and disrupt aquatic ecosystems. , Additionally, dyes may leach into the soil, affecting fertility, plant growth, and soil quality. , Moreover, colored wastewater containing dyes may infiltrate groundwater, contaminating groundwater resources and posing a threat to drinking water safety. Human exposure to contaminated water sources can lead to health issues such as skin allergies, respiratory diseases, and even cancer in severe cases .…”

Hollow-Architected Heteroatom-Doped Carbon-Supported Nanoscale Cu/Co as an Enhanced Magnetic Activator for Oxone to Degrade Toxicants in Water

“…(a) Effects of various scavengers on RDMB degradation (initial concentration of RDMB = 10 mg/L) and (b) corresponding rate constants; EPR analyses: (c) DMPO, (d) DMPO in methanol, (e) TEMP, (f) Concentrations of ROS; and FFA consumption by CuCoNC+Oxone. (References [ 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 ] are cited in the supplementary materials).…”