Enhanced molecular oxygen activation of Ni2+-doped BiO2-x nanosheets under UV, visible and near-infrared irradiation: Mechanism and DFT study

Li, Jun; Wang, Jia; Zhang, Gaoke; Li, Yuan; Wang, Kai

doi:10.1016/j.apcatb.2018.04.016

Cited by 132 publications

(63 citation statements)

References 73 publications

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“…These results revealed that the lattice fringe spacing of the K-Fe lattice was enhanced. 26,27 To conrm the existence of the FeOOH species and to study the electronic states of the elements in the composite, XPS analysis of the K-Fe samples was carried out. High-resolution XPS spectra of Fe 2p (c) and O 1s (d) are illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of photo-Fenton catalytic activity with the assistance of oxalic acid on the kaolin–FeOOH system for the degradation of organic dyes

Xiao

et al. 2020

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Enhancement of photo-Fenton catalytic activity with the assistance of oxalic acid on the kaolin–FeOOH system for the degradation of organic dyes

Xiao

et al. 2020

RSC Adv.

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“…Notably, Ni-doped BiVO 4 samples exhibited a lower emission peak intensity than BiVO 4 , suggesting that the recombination of charge pairs was inhibited and more holes transferred to the surface to trigger the water oxidation reaction [47]. However, too many dopants (10-Ni-BiVO 4 ) lead to an increase in emission peak intensity, attributed to the fact that part of the foreign Ni species acts at the recombination sites and suppresses the PEC performance [33].…”

Section: Optical Propertiesmentioning

confidence: 99%

“…5a. Under a dark environment, no photocurrent could be observed for BiVO 4 , while it showed a photocurrent of [33]. Meanwhile, the incident photon-to-current conversion efficiency (IPCE) was determined (Fig.…”

Section: Pec Performancementioning

confidence: 99%

“…Among them, doping by metal ions is a promising approach to tune the electronic and band structures, which may also cause surface defects and further improve the charge separation [26][27][28][29][30][31]. Recently, Ni ions were applied to narrow the band gap of BiVO 4 [32][33][34][35], and the atom radii difference between Ni 2+ (0.78 Å) and Bi 3+ (1.03 Å) could lead to abundant surface defects, which are beneficial to optical absorption and charge transfer [36].…”

Section: Introductionmentioning

confidence: 99%

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Ni-Doped BiVO4 with V4+ Species and Oxygen Vacancies for Efficient Photoelectrochemical Water Splitting

Kong

Liu

et al. 2019

Trans. Tianjin Univ.

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Bismuth vanadate is a promising photoanode material for photoelectrochemical (PEC) water splitting, but its activity and stability need to be further improved. In this work, we synthesized Ni-doped BiVO 4 abundant with V 4+ species and oxygen defects through an in situ electrodeposition method. The effective doping can decrease the particle size of BiVO 4 and lead to the formation of V 4+ species/oxygen defects. Accordingly, the doped and defective BiVO 4 showed high optical absorption and rapid charge transfer, and further showed much higher PEC activity than pure BiVO 4. Specifically, 5-Ni-BiVO 4 exhibits the highest activity in PEC water splitting, with a photocurrent of 2.39 mA/cm 2 at 1.23 V versus RHE (the reversible hydrogen electrode), which is 2.5 times higher than pure BiVO 4 (0.94 mA/cm 2), and much higher incident photon-to-current efficiency (IPCE) value of 45% (while only 25% for BiVO 4 at ca. 400 nm). This work provides an in situ method for the development of a high-performance photoanode.

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“…It is known that TiO 2 has been widely used as a photocatalyst due to its low cost, high stability and excellent photocatalytic activity under UV light. Unfortunately, low utilization of visible light and rapid recombination of photogenerated electrons and holes also restricts the development of TiO 2 . Therefore, it is necessary to develop novel semiconductor materials with strong light response range.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Graphitic Carbon Nitride Nanosheets as Efficient Catalysts for Degradation of Pollutants under Visible Light

2019

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In this paper, ultrathin g‐C3N4 nanosheets (U‐CNs‐4) were prepared via short time sonication‐assisted exfoliation and solvothermal treatment method in ethylene glycol solvent. It was found that the obtained ultrathin g‐C3N4 nanosheets with a thickness of ranges from 4 to 5 nm, exhibited a higher specific surface area of 35.7 m2/g and larger electronic band structure (by 0.16 eV), enhanced photocurrent response and improved electron transport ability due to the quantum confinement effect. The photocatalytic activities have been proved by photocatalytic degradation Rhodamine B (RhB) and ciprofloxacin (CIP) under visible‐light irradiation. Results show that the U‐CNs‐4 exhibited obviously enhanced photocatalytic activity in comparison with other samples. The degradation efficiency of RhB was 4.4 times higher than that of the bulk g‐C3N4 (B‐CN). The enhanced photocatalytic activity was due to the more active sites, the enhanced oxidation ability and improved electron transport ability, which improving separation efficiency of photogenerated electron‐hole pairs. Finally, the possible for the enhancing photocatalytic mechanism was revealed based on the active species trapping and electron spin resonance (ESR) experiments.

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Enhanced molecular oxygen activation of Ni2+-doped BiO2-x nanosheets under UV, visible and near-infrared irradiation: Mechanism and DFT study

Cited by 132 publications

References 73 publications

Enhancement of photo-Fenton catalytic activity with the assistance of oxalic acid on the kaolin–FeOOH system for the degradation of organic dyes

Enhancement of photo-Fenton catalytic activity with the assistance of oxalic acid on the kaolin–FeOOH system for the degradation of organic dyes

Ni-Doped BiVO4 with V4+ Species and Oxygen Vacancies for Efficient Photoelectrochemical Water Splitting

Ultrathin Graphitic Carbon Nitride Nanosheets as Efficient Catalysts for Degradation of Pollutants under Visible Light

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