Boron doping positively enhances the catalytic activity of carbon materials for the removal of bisphenol A

Yang, Hong; Huo, Xiaowei; Jin-hong, GU; Lei, Wei; Sun, Zhenping; Du, Fuxiang; Dai, Chuan‐Chao; Wu, Xin; Liu, Zhiguang; Ren, Jing

doi:10.1039/d2ra02703h

Cited by 6 publications

(1 citation statement)

References 56 publications

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“…The boron-doped systems result in single gold atom adsorption that is stronger than that for the idealized system, though not as strong as that of the SCOV-defective system (Table ). The increased stability of the gold adatom in the presence of the boron dopant is expected because similar effects have been reported for the adsorption energy of hydrogen − and metal atoms such as calcium , and sodium. , The stronger adsorption for boron-doped surfaces, as opposed to the undoped pristine surface, occurs as boron dopants possess one fewer valence electrons than the carbon atoms in diamond. Such p-type dopants form an electron-deficient region that the gold adatom is attracted toward .…”

Section: Resultssupporting

confidence: 58%

Stability of Single Gold Atoms on Defective and Doped Diamond Surfaces

2023

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Polycrystalline boron-doped diamond (BDD) is widely used as a working electrode material in electrochemistry, and its properties, such as its stability, make it an appealing support material for nanostructures in electrocatalytic applications. Recent experiments have shown that electrodeposition can lead to the creation of stable small nanoclusters and even single gold adatoms on the BDD surfaces. We investigate the adsorption energy and kinetic stability of single gold atoms adsorbed onto an atomistic model of BDD surfaces by using density functional theory. The surface model is constructed using hybrid quantum mechanics/ molecular mechanics embedding techniques and is based on an oxygen-terminated diamond (110) surface. We use the hybrid quantum mechanics/molecular mechanics method to assess the ability of different density functional approximations to predict the adsorption structure, energy, and barrier for diffusion on pristine and defective surfaces. We find that surface defects (vacancies and surface dopants) strongly anchor adatoms on vacancy sites. We further investigated the thermal stability of gold adatoms, which reveals high barriers associated with lateral diffusion away from the vacancy site. The result provides an explanation for the high stability of experimentally imaged single gold adatoms on BDD and a starting point to investigate the early stages of nucleation during metal surface deposition.

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Section: Resultssupporting

confidence: 58%

Stability of Single Gold Atoms on Defective and Doped Diamond Surfaces

2023

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Catalytic activation of persulfate by nanoscale zero-valent iron-derived supported boron-doped porous carbon for bisphenol A degradation

Du,

Huo,

Xue

et al. 2024

Environ Sci Pollut Res

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In this study, boron modi ed carbon materials (BCs) with porous structures and high surface areas were rstly synthesized employing coffee grounds, sodium bicarbonate and boric acid as precursors, afterward, nanoscale zero-valent iron (nZVI) and BCs composites (denoted as nZVI@BCs) were synthesized through reduction of FeSO 4 by NaBH 4 along with stirring. The catalytic performance of the nZVI@BCs was evaluated for the degradation of bisphenol A (BPA) via persulfate (PS) activation. In comparison with nZVI@Cs/PS, nZVI@BCs/PS could greatly promote the degradation and mineralization of BPA. Further analysis exhibited that our system existed radical pathway and non-radical pathway for BPA removal. On the one hand, electron spin resonance and radical quenching studies represented that • OH, SO 4•− and O 2 •− were mainly produced in the nZVI@BCs/PS system, which were responsible for the degradation of BPA. On the other hand, the open circuit voltages of nZVI@BCs and nZVI@Cs in different systems indicated that non-radical pathway still existed in our system. PS could grab the unstable unpaired electron on nZVI@BCs to form a carbon materials surface-con ned complex ([nZVI@BCs]*) with a high redox potential, then accelerate BPA removal e ciency via electron transfer. Furthermore, the performances and mechanisms for BPA degradation were examined by PS activation with nZVI@BCs composites at various conditions including dosages of nZVI@BCs, BPA and PS, initially pH value, temperature, common anions and humid acid. This study provides a novel insight for development of high-performance carbon catalysts toward environmental remediation.

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Dual step-scheme heterojunction with full-visible-light-harvesting towards synergistic persulfate activation for enhanced photodegradation

Zhang

et al. 2023

Journal of Colloid and Interface Science

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Boron doping positively enhances the catalytic activity of carbon materials for the removal of bisphenol A

Abstract: Boron-doped carbon materials, based on coffee grounds, sodium bicarbonate and boric acid, were synthesized via a simple hydrothermal process. The ability of a boron-doped carbon material/persulfate system to remove bisphenol A was systematically studied.

Cited by 6 publications

References 56 publications

Stability of Single Gold Atoms on Defective and Doped Diamond Surfaces

Stability of Single Gold Atoms on Defective and Doped Diamond Surfaces

Catalytic activation of persulfate by nanoscale zero-valent iron-derived supported boron-doped porous carbon for bisphenol A degradation

Dual step-scheme heterojunction with full-visible-light-harvesting towards synergistic persulfate activation for enhanced photodegradation

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