Thiourea-assisted one-step fabrication of a novel nitrogen and sulfur co-doped biochar from nanocellulose as metal-free catalyst for efficient activation of peroxymonosulfate

Xu, Yan; Shuan, Liu; Wang, Min; Zhang, Jian; Ding, Haojie; Song, Yunqian; Zhu, Ying; Pan, Qixin; Zhao, Chun; Deng, Huiping

doi:10.1016/j.jhazmat.2021.125796

Cited by 84 publications

(18 citation statements)

References 67 publications

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“…The multi-heteroatom doping of biochar utilizes possible synergistic interactions between different heteroatoms to alter the charge and spin density of C in biochar, which may be beneficial for PS activation. For instance, the synergistic interaction of N (graphitic N) and S (thiophenic S) in biochar has been shown to be able to redistribute the charge density of the C lattice in biochar, which will improve the electron-donating properties of biochar and facilitate PS activation [93][94][95].…”

Section: Ps Activationmentioning

confidence: 99%

Application of Biochar as Functional Material for Remediation of Organic Pollutants in Water: An Overview

et al. 2022

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In recent years, numerous studies have focused on the use of biochar as a biological material for environmental remediation due to its low-cost precursor (waste), low toxicity, and diversity of active sites, along with their facile tailoring techniques. Due to its versatility, biochar has been employed as an adsorbent, catalyst (for activating hydrogen peroxide, ozone, persulfate), and photocatalyst. This review aims to provide a comprehensive overview and compare the application of biochar in water remediation. First, the biochar active sites with their functions are presented. Secondly, an overview and summary of biochar performance in treating organic pollutants in different systems is depicted. Thereafter, an evaluation on performance, removal mechanism, active sites involvement, tolerance to different pH values, stability, and reusability, and an economic analysis of implementing biochar for organic pollutants decontamination in each application is presented. Finally, potential prospects to overcome the drawbacks of each application are provided.

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Section: Ps Activationmentioning

confidence: 99%

Application of Biochar as Functional Material for Remediation of Organic Pollutants in Water: An Overview

et al. 2022

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“…285 Synthesized N-and S-codoped biochar to activate peroxymonosulfate (PMS) for oxidation of sulfamethoxazole-(SMX) in water has also been studied, showing that the removal efficiency of SMX through oxidation with the presence of N-and S-codoped biochar is 2.3 to 3.1 times higher than common metal oxide catalysts. 508 Biochar has been used as a catalyst in the biomass biorefining process, such as biodiesel production, biomass hydrolysis, bio-oil upgrading, tar removal, and the Fischer− Tropsch synthesis of liquid hydrocarbons from syngas. 509 Fedoped biochar has been explored as a catalyst for bio-oil upgrading in the pyrolysis of pine wood.…”

Section: So (Gas)mentioning

confidence: 99%

“…S atom and graphitic/pyridinic N in the structure of biochar changed the electronic properties of biochar and generated more Lewis acid and basic sites . Synthesized N- and S-codoped biochar to activate peroxymonosulfate (PMS) for oxidation of sulfamethoxazole(SMX) in water has also been studied, showing that the removal efficiency of SMX through oxidation with the presence of N- and S-codoped biochar is 2.3 to 3.1 times higher than common metal oxide catalysts …”

Section: Environmental Applications Of Biocharmentioning

confidence: 99%

Perspectives of Engineered Biochar for Environmental Applications: A Review

2022

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Research on using biochar for environmental applications has witnessed unprecedented advances in the past decade. Biochar is universally considered one of the best alternatives to store carbon to fight global warming. Thus, the sequential use of biochar in environmental remediation compatible with carbon sequestration is receiving growing attention. One of the reasons for such huge interest is the possibility to engineer biochar with targeted properties (e.g., surface area and chemistry) relevant to existing environmental issues. These properties can be achieved by selecting appropriate raw materials, processing conditions, carbonization technology, and the possibility of selecting postproduction modification approaches. The objective of this review is to summarize strategies to enhance biochar properties relevant to its use in environmental services (e.g., water purification, air/gas cleaning, construction materials, soil amendments) and the corresponding results on the use of this material for these applications. The main methods for enhancing biochar properties for environmental applications reviewed include activation (physical and chemical), oxidation, metal and metal oxide modification, metal-free heteroatom doping, and biological modification. Both modified and unmodified biochars have been used for soil amendments as adsorbents of pollutants in the aqueous phase (e.g., removal of P and N, heavy metals, and organic pollutants), adsorbents of pollutants in the gas phase (e.g., biogas cleaning), as a catalyst, as an additive for improving anaerobic digestion, and as an admixture to cementitious/construction materials, with promising results in all cases. New opportunities for using biochar are being reported as the science of biochar production, modification, and use advances.

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“…Luo et al prepared the N-doped graphitic carbon activated PMS to degrade BPA, and only 1 O 2 species was produced in the process . Surface-bound free radicals are generated in the nitrogen-doped graphitized biochar system . Shao et al found that the double-vacancy defect on the carbon nanotube (CNT) may be the catalytic center, which can promote electron transfer from organics to PMS molecules .…”

Section: Introductionmentioning

confidence: 99%

“…19 Surface-bound free radicals are generated in the nitrogen-doped graphitized biochar system. 28 Shao et al found that the double-vacancy defect on the carbon nanotube (CNT) may be the catalytic center, which can promote electron transfer from organics to PMS molecules. 29 Cai et al used N-doped biochar to prove that pyrrolic-N is an active site that can generate surface-bound radicals and electron transfer mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mediated Electron Transfer Pathway of Peroxymonosulfate Activation Dominated with Graphitic-N for the Efficient Degradation of Various Organic Contaminants in Multiple Solutions

Liu

Pan

et al. 2022

ACS EST Water

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Persulfate activated by carbon catalysts raised tremendous attention as a promising approach for degrading organic contaminants because the nonradical species produced can resist the interference of background substances. However, due to the complex and diverse structures of carbon catalysts, the reported peroxymonosulfate (PMS) activation mechanisms are varied. Herein, we used fabricated N-doped carbon nanotubes with a simple one-dimensional structure as a model catalyst to reveal the nature of PMS activation by carbon catalysts. The graphitic-N was identified as the active center to play a dominant role via structure–activity relationship analysis and density functional theory (DFT). Moreover, electron paramagnetic resonance, radical scavenging tests, and in situ Raman spectra demonstrated that the generated common reactive oxygen species did not contribute to carbamazepine (CBZ) degradation, but the electron transfer process directly oxidized the organic. Fortunately, the direct electron transfer pathway could quickly and simultaneously degrade various organics (including CBZ, sulfamethoxazole, bisphenol A, diclofenac, and tetracycline). In addition, the nature of degradation differences of various organics was revealed through the Fukui function calculated by DFT. This work revealed the mechanism of PMS activation by graphitic-N to produce mediated electron transfer pathways and provided an insight into the decomposition difference of various organic contaminants.

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Thiourea-assisted one-step fabrication of a novel nitrogen and sulfur co-doped biochar from nanocellulose as metal-free catalyst for efficient activation of peroxymonosulfate

Cited by 84 publications

References 67 publications

Application of Biochar as Functional Material for Remediation of Organic Pollutants in Water: An Overview

Application of Biochar as Functional Material for Remediation of Organic Pollutants in Water: An Overview

Perspectives of Engineered Biochar for Environmental Applications: A Review

Enhanced Mediated Electron Transfer Pathway of Peroxymonosulfate Activation Dominated with Graphitic-N for the Efficient Degradation of Various Organic Contaminants in Multiple Solutions

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