Honeycomb-like MnO2/Biochar Catalyst Fabricated by High-Energy Electron Beam Irradiation for Degradation of Antibiotics in Swine Urine

Abstract

The modification of biochar is essential for the development of multifunctional biochar materials with enhanced remediation effects on contaminated water. In this work, a biochar-based microcatalyst with sunlight sensitivity was synthesized by a creative modification method that involved the rapid fabrication of MnO2 microspheres by high-energy electron beam (HEEB) irradiation, and loading them into corn straw-derived honeycomb-like KOH-modified biochar (MBC) to obtain a sunlight-sensitive microcatalyst (SSM). The honeycomb-like structure of MBC facilitated the improvement in MnO2 dispersion and photocatalytic property through confinement effect. The effects of photocatalyst dosage, initial chlortetracycline (CTC) concentration, solution pH, temperature and coexisting ions on the photocatalytic performance of SSM were systemically investigated. The results indicated that SSM could efficiently degrade CTC in water and swine urine under sunlight, and exhibited high stability against coexistence of urea, Cl− and SO42−. Moreover, SSM showed good reusability in regeneration studies. This work provides a novel method for degrading CTC with potential application prospect.

Potential of MnO2‐based composite and numerous morphological for enhancing supercapacitors performance

“…SEM images of (A) nanowire, 131 (B) nanoflower, 132 (C) urchin‐like, 133 (D) nanorods, 134 (E) staghorn coral shape, 135 (F) nanorods, 136 (G) flower‐like, 136 (H) honeycomb‐like, 137 and (I) nanofiber 138 …”

“…Figure 4 shows various MnO 2 morphologies to create supercapacitors and reveals an electrochemical performance improvement whenever morphological alterations are made from one form to another. 131 (B) nanoflower, 132 (C) urchin-like, 133 (D) nanorods, 134 (E) staghorn coral shape, 135 (F) nanorods, 136 (G) flower-like, 136 (H) honeycomb-like, 137 and (I) nanofiber. 138…”

Insight into electrocatalytic activation of peroxymonosulfate by Ti/MnO2 anode via one-step electrodeposition approach toward degradation of levofloxacin

“…20 Furthermore, evenly dispersed MnO 2 particles in the degraded pollutant solution need to be further separated after completing the degradation process, which conventionally increases the operational cost. 21 Thus, it is imperative to explore the MnO 2 electrode and its facile fabrication procedure to improve the practical availability of pollutant degradation using the PMS activation technique. In particular, there are rare reports on EC combined with PMS activation for LFX degradation with an MnO 2 electrocatalyst electrode.…”