The sustainable utilization of biochar produced from biomass waste could substantially promote the development of carbon neutrality and a circular economy. Due to their cost-effectiveness, multiple functionalities, ta...
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Terephthalic acid (TA) is an important industrial raw material. A large amount of wastewater, mainly containing TA, is generated in the pure terephthalic acid (PTA) producing process. In this study, an advanced oxidat...
Terephthalic acid (TA) is an important industrial raw material. A large amount of wastewater, mainly containing TA, is generated in the pure terephthalic acid (PTA) producing process. In this study, an advanced oxidation process based on persulfate like Na 2 S 8 O 8 was proposed to degrade TA. The result showed that higher temperature was conducive to degrade TA due to better thermal activation effect, causing more radicals to generate, and the removal ratio of TA reached to a high level of 95.2% at 80 °C. Meanwhile, the TA removal efficiency (maximum 97.4%) at alkaline conditions was better than that in both acidic conditions (about 94%) and neutral condition (85%) at 80 °C. It implied the removal of TA could be carried out effectively in thermal activation mode, and further intensified in the alkaline environment on the basis of thermal activation. The generation of free radicals with thermal activation could be used to explain the degradation mechanism of the organic. Overall, a max total organic carbon (TOC) removal of 97.7% could be achieved, and a probable reaction pathway was proposed with the identification of the intermediate products during TA oxidation. These results could provide a theoretical basis for lower energy consumption and effective treatment of PTA industrial wastewater , which is usually at 75–85 °C and suitable for thermal activation.
Photocatalytic hydrogen peroxide (H 2 O 2 ) production has emerged as an attractive alternative to the traditional anthraquinone process. However, its performance is often hindered by low selectivity and sluggish kine...
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Photocatalytic hydrogen peroxide (H 2 O 2 ) production has emerged as an attractive alternative to the traditional anthraquinone process. However, its performance is often hindered by low selectivity and sluggish kinetics of oxygen reduction reaction (ORR). Herein, we report an anthrazoline-based supramolecular photocatalyst, SA - SADF - H + , featuring an unsymmetric protonation structure for H 2 O 2 photosynthesis from water and air. The introduction of unsymmetric protonation disrupts the initial mirror symmetry of SADF , significantly enhancing the molecular dipole and facilitating efficient charge separation and electron transfer. Additionally, this modification increases the hydrophilicity of SA - SADF - H + , enabling the interaction of water and dissolved oxygen with the catalytic sites. The altered electron density distribution creates numerous dual active sites for Yeager-type O 2 adsorption, facilitating an efficient ORR towards H 2 O 2 via a direct one-step two-electron pathway. Notably, SA-SADF - H + achieves an outstanding photocatalytic H 2 O 2 production at a rate of 4666.7 μmol L −1 h −1 , with a remarkable solar-to-chemical conversion (SCC) of 1.35 %, surpassing most organic photocatalytic systems. Furthermore, SA - SADF - H + demonstrates remarkable photocatalytic antibacterial activity, achieving 100 % antibacterial efficiency against Staphylococcus aureus within 60 min.
This article has been retracted at the request of the first and corresponding author, Dr. Karthik Chandran. The author has alerted the Editor-in-Chief of IJUFKS the reasons for the retraction: The proposed system was ...
This article has been retracted at the request of the first and corresponding author, Dr. Karthik Chandran. The author has alerted the Editor-in-Chief of IJUFKS the reasons for the retraction: The proposed system was modelled with the incorrect data set. The system response has become incorrect because of this incorrect data set. Two percent of the information (mathematical assumptions) was taken from one paper without proper citation of the source.
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