Efficient Adsorption-Photocatalytic Removal of Tetracycline Hydrochloride over Octahedral MnS

Abstract

To disclose the effect of crystal plane on the adsorption-photocatalytic activity of MnS, octahedral MnS was prepared via the hydrothermal route to enhance the adsorption and photocatalytic efficiencies of tetracycline hydrochloride (TCH) in visible light region. The optimal MnS treated at 433 K for 16 h could remove 94.83% TCH solution of 260 mg L−1 within 180 min, and its adsorption-photocatalytic efficiency declined to 89.68% after five cycles. Its excellent adsorption-photocatalytic activity and durability were ascribed to the sufficient vacant sites of octahedral structure for TCH adsorption and the feasible band-gap structure for visible-light response. In addition, the band gap structure (1.37 eV) of MnS with a conduction band value of −0.58 eV and a valence band value of 0.79 eV was favorable for the generation of O2−, while unsuitable for the formation of OH. Hence, octahedral MnS was a potential material for the removal of antibiotics from wastewater.

2D/2D Z-scheme WO3/g-C3N4 heterojunctions for photocatalytic organic pollutant degradation and nitrogen fixation

“…[17][18][19] Tetracycline hydrochloride (TC-HCl) has been widely used in humans and animals as an inexpensive broad-spectrum antibiotics. [20][21][22][23] TC-HCl easily accumulates in water and soil systems because of its excellent water solubility and long half-life. [20][21][22][23] Organic dyes are common organic pollutants, and the same method has different removal effects on dyes with different properties.…”

“…[20][21][22][23] TC-HCl easily accumulates in water and soil systems because of its excellent water solubility and long half-life. [20][21][22][23] Organic dyes are common organic pollutants, and the same method has different removal effects on dyes with different properties. 24 The traditional removal methods of organic pollutants in the water include physical adsorption, chemical oxidation, and biodegradation.…”

“…However, most of them have the disadvantages of poor efficiency, complicated methods, high cost, or easily causes secondary pollution. 16,[21][22][23] The degradation of different-type organic pollutants in water is an urgent problem to be solved.…”

Montmorillonite-based Adsorption and Thermal Combustion: A Novel Approach to Purify Tetracycline-Contaminated Water

“…Various adsorbent materials, including activated carbon, metal oxide, and montmorillonite, have demonstrated the effectiveness of their technique in removing tetracycline from contaminated water by adsorption [22][23][24][25], or by adsorption followed by photodegradation [25][26][27]. This article presents a novel approach to regenerate and activate used montmorillonite through thermal combustion, allowing for its reuse in further adsorption processes.…”

Montmorillonite-based Adsorption Followed by Thermal Combustion: A Novel Approach to Purify Tetracycline-Contaminated Water

“…Different adsorbent materials, including actuated carbon, metal oxide, and montmorillonite, have shown the viability of their method in eliminating antibiotic medication from polluted water by adsorption (Hoslett et al, 2021;Jannat Abadi et al, 2019;Sayğılı and Güzel, 2016;Zhao et al, 2020), or by adsorption followed by photodegradation (Guo et al, 2022;Hoslett et al, 2021;Zyoud et al, 2017). Utilized montmorillonite can be repurposed in subsequent adsorption processes thanks to the novel thermal combustion method described in this article.…”