Facile fabrication of Eu-based metal–organic frameworks for highly efficient capture of tetracycline hydrochloride from aqueous solutions

Abstract

The tetracycline hydrochloride (TCH) removal from wastewater is important for the environment and human health yet challenging. Herein, the Eu-based MOF, Eu(BTC) (BTC represents 1,3,5-trimesic acid) was prepared by an efficient and environmental-friendly strategy, and then was used for the TCH capture for the first time. The Eu(BTC) was characterized by different methods such as X-ray diffraction, scanning electron microscopy and Fourier-transform infrared spectroscopy. The TCH uptake of Eu(BTC) was investigated systematically. The influences of experiment conditions such as solution pH value, adsorption time and initial concentration on TCH capacity of Eu(BTC) were also studied. The Eu(BTC) obtained exhibited remarkable TCH uptake (qm was up to 397.65 mg/g), which was much higher than those of most materials such as UiO-66/PDA/BC (184.30 mg/g), PDA-NFsM (161.30 mg/g) and many carbon-based materials reported till now. Besides, the TCH adsorption behavior on Eu(BTC) was explored by Freundlich and Langmuir equations, and the adsorption mechanism was further analyzed. The experimental results suggested that the TCH adsorption mechanism of Eu(BTC) included the π–π interaction, electrostatic interaction and coordinate bonds. The excellent TCH adsorption performance and the efficient fabrication strategy make the Eu(BTC) prepared promising in TCH removal.

A robust single compartment peroxide fuel cell using mesoporous antimony doped tin oxide as the cathode material

“…S2a†) is consistent with the representative type IV, which suggests the existence of mesopores. 32,33 From the BJH pore distribution plot (Fig. S2b†) it is further evident that the material consists of pores in the pore diameter range of 2 to 30 nm, which confirms that the prepared ATO catalyst is mesoporous in nature.…”

Hydrogen Peroxide-Modified Biochars from Wetland Plants for Bisphenol A Removal in Water

“…Similarly, the micropore surface area, micropore volume, mesopore surface area, and mesopore volume of X56G were significantly larger than those of X56. The oxidation of hydrogen peroxide corrodes the internal pores of biochars, leading to their collapse and subsequent blockage of large- and medium-sized pores, resulting in the formation of micropores or mesopores that facilitate adsorption reactions. , …”