High-efficiency treatment of electroless nickel plating effluent using core-shell MnFe2O4-C@Al2O3 combined with ozonation: Performance and mechanism

Guan, Zhijie; Guo, Yuhai; Mo, Zhihua; Chen, Shaojin; Liang, Jialin; Liao, Xiaojian; Huang, Zhenhua; Song, Weifeng; Xu, Yanbin; Ou, Xuelian; Sun, Shuiyu

doi:10.1016/j.jhazmat.2022.128768

Cited by 31 publications

(2 citation statements)

References 85 publications

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“…And as shown in Figure 8B-E What is more, the α-MnO 2 -N/C@AC catalyst shows optimal catalytic activity under the same oxidation process conditions (Figure 8F), with a COD removal rate of about 73%, and it reaches equilibrium at about 20 min, which is 20 min shorter than that of the N/C catalyst, indicating that the dual-site synergistic catalysis of the α-MnO 2 -N/C@AC catalyst has significant advantages, that is, faster oxidative degradation rate and higher COD removal rate. In addition, electrochemical tests of the catalysts (EIS tests as well as LSV curve measurements; Figures S9 and S10) show that the prepared α-MnO 2 -N/C@AC catalysts have lower electron transfer resistance and higher starting current density compared to AC and MnO 2 /AC, which are very favorable for accelerating the cyclic transition between the multivalent states of the metal active components, 48,49 further demonstrating that the heterogeneous structure of α-MnO 2 -N/C@AC catalyst can provide more electrons for the ozone-catalyzed conversion process and generate more reactive radicals.…”

Section: Determination Of Active Sitementioning

confidence: 99%

Efficient treatment of salty organic wastewater by α‐MnO₂‐N/C synergistic catalytic ozonation: Effect and mechanism

Shao

et al. 2023

AIChE Journal

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A novel and efficient α‐MnO2‐N/C@active carbon (AC) catalyst was proposed and synthesized through a surface modification method based on imprinting process. Uniformly dispersed α‐MnO2 and N/C sites were constructed simultaneously and the competitive adsorption of metal precursors with nonmetal precursors was avoided. Conformational relationship of α‐MnO2‐N/C@AC revealed that α‐MnO2 and graphite N were the main active sites, cleverly forming synergistic catalytic effect, which results in a good degradation effect for two actual printing and dyeing wastewater. The removal rate of chemical oxygen demand (COD) could reach 78% and 58% within 60 min, respectively, and it maintained stable after 20 repetitions without leaching of metal ions. Mechanistic investigation demonstrated that N/C sites rapidly adsorbed ozone to generate ·O2− and synergistically catalyzed with adjacent α‐MnO2 sites to further produce ·OH, significantly facilitating the generation of ·OH. This work provides a promising strategy to synthesize novel and efficient catalysts for ozone catalytic oxidation process.

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Section: Determination Of Active Sitementioning

confidence: 99%

Efficient treatment of salty organic wastewater by α‐MnO₂‐N/C synergistic catalytic ozonation: Effect and mechanism

Shao

et al. 2023

AIChE Journal

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“…Dithiocarbamates are an important class of sulfur-containing organic compounds with a wide range of applications in both academia and industry [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. They serve as fungicides and pesticides in agriculture [ 17 , 18 , 19 ], vulcanization agents in the rubber industry [ 20 ], radical chain transfer agents in polymerization [ 21 ], effective ligands in coordination chemistry [ 22 ], and, last but not least, as biologically important structural motifs in medicinal chemistry ( Scheme 2 ) [ 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Oleanolic Acid-Dithiocarbamate Conjugates and Evaluation of Their Broad-Spectrum Antitumor Activities

Tang

Zhang

et al. 2023

Molecules

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Efficient and mild synthetic routes for bioactive natural product derivatives are of current interest for drug discovery. Herein, on the basis of the pharmacophore hybrid strategy, we report a two-step protocol to obtain a series of structurally novel oleanolic acid (OA)-dithiocarbamate conjugates in mild conditions with high yields. Moreover, biological evaluations indicated that representative compound 3e exhibited the most potent and broad-spectrum antiproliferative effects against Panc1, A549, Hep3B, Huh-7, HT-29, and Hela cells with low cytotoxicity on normal cells. In terms of the IC50 values, these OA-dithiocarbamate conjugates were up to 30-fold more potent than the natural product OA. These compounds may be promising hit compounds for the development of novel anti-cancer drugs.

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Ni–Ca metastable–nonmetastable bimetallic sites induced ·OH directed generation and efficient water purification

Qin,

Liu,

Zhou

et al. 2024

AIChE Journal

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Strongly oxidizing ·OH can non‐selectively degrade various organic pollutants, but how to selectively generate ·OH is a great challenge. In this study, the directed generation of ·OH was achieved based on Ni–Ca metastable–nonmetastable bimetallic sites, Ni2+/Ni3+ valence cycling provided electrons for ·OH generation induced by the non‐variable Ca‐based sites, which constructed a nearly 100% selective generation pathway of ·OH (O3 → HO3/HO2 → OH). The antibiotic pefloxacin could be completely removed in 15 min, and the COD removal efficiency for other hard‐to‐degrade pollutants such as oxalic acid and chlorobenzoic acid could reach more than 90%. Ni doping significantly increased the oxygen vacancy and Lewis acid content, and DFT calculations showed that Ni–Ca dual‐site had a lower reaction energy barrier and the complexed hydroxyl radical intermediate *OO had a higher spin density (−0.6), which was more favorable for the generation of ·OH. Therefore, this study provides new ideas for efficient treatment of actual wastewater.

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High-efficiency treatment of electroless nickel plating effluent using core-shell MnFe2O4-C@Al2O3 combined with ozonation: Performance and mechanism

Cited by 31 publications

References 85 publications

Efficient treatment of salty organic wastewater by α‐MnO₂‐N/C synergistic catalytic ozonation: Effect and mechanism

Efficient treatment of salty organic wastewater by α‐MnO₂‐N/C synergistic catalytic ozonation: Effect and mechanism

Synthesis of Oleanolic Acid-Dithiocarbamate Conjugates and Evaluation of Their Broad-Spectrum Antitumor Activities

Ni–Ca metastable–nonmetastable bimetallic sites induced ·OH directed generation and efficient water purification

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High-efficiency treatment of electroless nickel plating effluent using core-shell MnFe2O4-C@Al2O3 combined with ozonation: Performance and mechanism

Cited by 31 publications

References 85 publications

Efficient treatment of salty organic wastewater by α‐MnO2‐N/C synergistic catalytic ozonation: Effect and mechanism

Efficient treatment of salty organic wastewater by α‐MnO2‐N/C synergistic catalytic ozonation: Effect and mechanism

Synthesis of Oleanolic Acid-Dithiocarbamate Conjugates and Evaluation of Their Broad-Spectrum Antitumor Activities

Ni–Ca metastable–nonmetastable bimetallic sites induced ·OH directed generation and efficient water purification

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Efficient treatment of salty organic wastewater by α‐MnO₂‐N/C synergistic catalytic ozonation: Effect and mechanism

Efficient treatment of salty organic wastewater by α‐MnO₂‐N/C synergistic catalytic ozonation: Effect and mechanism