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Current Nanoscience - Online First
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Nanoencapsulation as an Ally of the Bioactive Compound Carvacrol: A Review of 10 Years of Advances
Available online: 03 October 2024More LessFoodborne diseases (FBDs) are a major global public health problem, causing millions of deaths annually and substantial economic losses. Antimicrobial treatment is increasingly challenged by bacterial resistance. Essential oils from herbs and spices, such as carvacrol from thyme and oregano, offer potential solutions due to their broad-spectrum antimicrobial properties. However, its stability and its controlled release are affected by media and environmental conditions. Nanoencapsulation presents a promising alternative to address these challenges. This review analyzes 44 original papers and 21 patents concerning the recent advancements in the nanoencapsulation of carvacrol over the past decade, focusing on natural matrices and their applications in food, packaging, and human health fields. Various encapsulation techniques and matrices have been explored, demonstrating that nanoencapsulation can maintain the stability and antimicrobial efficacy of carvacrol. Moreover, nanoencapsulated carvacrol shows promising applications in inhibiting biofilm formation and quorum sensing, as well as exhibiting anticancer and anti-inflammatory effects. Patents related to nanoencapsulated carvacrol highlight its potential for intelligent packaging and healthcare. Nanoencapsulated carvacrol is a promising alternative to synthetic antimicrobials and as an adjuvant in inflammatory disease treatments and cancer, offering enhanced efficacy and versatility in applications.
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Fabrication of Ti/Zr-SnO2/PbO2-Nd Electrode for Efficient Electrocatalytic Degradation of Alizarine Yellow R
Authors: Jing Zhang, Bi Yang, Guan-Jin Gao, Qing-Dong Miao, Wei-Guo Hu and Jin-Gang YuAvailable online: 30 August 2024More LessIntroductionA novel attempt to degrade alizarine yellow R (AYR) by lead dioxide (PbO2)/ neodymium (Nd) coated Ti anode was investigated.
MethodTi/Zr-SnO2/PbO2-Nd electrode showed high oxygen evolution potential, high current density, and neutral conditions, which favored the degradation of AYR. The PbO2-Nd layer on Ti/Zr-SnO2 was further characterized by scanning electron microscopy, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. The electrochemical properties of Ti/Zr-SnO2/PbO2-Nd electrode were evaluated by cyclic voltammetry, AC impedance spectroscopy, and accelerated life test.
ResultThe relatively higher oxygen evolution overpotential (~1.80 V) of the developed electrode can effectively suppress the occurrence of surface side reactions and oxygen evolution. A relatively lower charge transfer resistance (Rct, 18.0 Ω) of Ti/Zr-SnO2/PbO2-Nd electrode could be found. The Ti/Zr-SnO2/PbO2-Nd electrode exhibited an accelerated lifetime of 110 min under a very high current density of 10,000 A/m2. The doping of Nd could produce loosely-stacked sheet-like structures, thus, the number of active sites on the electrode surface increases.
ConclusionMoreover, an outstanding conductivity of Ti/Zr-SnO2/PbO2-Nd electrode was obtained, which favored the electron transfer and catalytic activity of the modified electrode. The Ti/Zr-SnO2/PbO2-Nd electrode exhibited improved electrochemical performances and higher oxygen evolution potential, and the highest oxygen evolution potential is 1.80 V. Under the current density of 30 mA/cm2, the electrocatalytic degradation of 92.3% could be achieved in 180 min. The electrochemical oxidation of AYR at the Ti/Zr-SnO2/PbO2-Nd electrode proved to be feasible and effective, indicating that it might be used for the elimination of AYR from wastewater.
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A Brief Review on Solar Light Assisted Photocatalytic Degradation of Dyes using Double/Layered Perovskites
Authors: Rasmirekha Pattanaik, Debapriya Pradhan and Suresh Kumar DashAvailable online: 20 March 2024More LessDuring the past few decades, great efforts have been devoted to developing non-toxic, low-cost, green and studied photocatalysts for the degradation of toxic dyes from surface water with the aid of sustainable, plentiful, and renewable solar light irradiation. Perovskite oxides with a wide range of applications, including photocatalytic water decontamination possess unique properties that make them suitable for performing efficiently in visible spectrum and facilitate catalytic reactions. This mini-review specifically specializes in double/layered perovskites and their associated materials and summarizes the recent improvement of double/layered perovskite photocatalysts and their packages in the degradation of organic dyes.
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