Extremely efficient electro-Fenton-like Sb(III) detoxification using nanoscale Ti-Ce binary oxide: An effective design to boost catalytic activity via non-radical pathway

Ren, Yifan; Liu, Yanbiao; Liu, Fuqiang; Li, Fang; Shen, Chensi; Wu, Zhuangchun

doi:10.1016/j.cclet.2021.02.007

Cited by 36 publications

(15 citation statements)

References 26 publications

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“…This gives priority to the selection of a proper substrate material to improve the stability and dispersion of MoS 2 . To this end, the 1D carbon nanotube (CNT) makes an ideal choice of support material because of its exceptional attributes . In addition, CNTs can be transformed into three-dimensional porous networks using simple processes such as vacuum filtration .…”

Section: Introductionmentioning

confidence: 99%

“…To this end, the 1D carbon nanotube (CNT) makes an ideal choice of support material because of its exceptional attributes. 22 In addition, CNTs can be transformed into threedimensional porous networks using simple processes such as vacuum filtration. 23 This design strategy would also allow flowthrough operation, convection-enhanced mass transport, and full utilization of both exterior and interior active sites of the hybrid filter.…”

Section: ■ Introductionmentioning

confidence: 99%

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Redox-Active Nanohybrid Filter for Selective Recovery of Gold from Water

et al. 2021

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There is an increasing demand for the recovery of noble metals with high added value from complex matrices. Traditional strategies reported to date usually require toxic chemicals and complicated operation under extreme extraction conditions. With the aim of achieving effective and selective recovery of trace amounts of Au from water, herein, we developed a functional redox-active nanohybrid filter consisting of carbon nanotube (CNT) and three-dimensional molybdenum disulfide (MoS 2 ) nanoflowers. The CNT-MoS 2 nanohybrid filter demonstrated an ultrahigh recovery capacity of 2495 mg/g toward Au(III) which could be attributed to its sufficient exposed active sites, excellent stability, flow-through design, and redox-active capability. Extensive experimental studies and advanced characterizations confirmed that the recovery mechanism of Au(III) involved a two-step adsorption−reduction process between Au(III) and the MoS 2 nanoflowers. Au(III) was first adsorbed by chelation to the S atoms of the MoS 2 moiety and then spontaneously reduced to Au(0) via electron capture from Mo(IV). Notably, thanks to the high affinity with a binding energy of −1.523 eV for Au(III), the CNT-MoS 2 nanohybrid filter exhibited superior selectivity (distribution coefficient of 5.6 × 10 5 mL/g) in the presence of several common anions and cations or even in actual Au(III)-containing industrial wastewater. This study provides a proof-of-concept demonstration of a redox-active nanohybrid filter for extracting noble metal from complex wastewater.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Redox-Active Nanohybrid Filter for Selective Recovery of Gold from Water

et al. 2021

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“…As shown in Figure c, the EPR spectrum of the UiO-66(Zr) shows a negligible peak, which may be attributed to inherent defects. Once monocarboxylic acids are introduced, the spectra show a distinct peak at g = 2.003, indicating the existence of a significant amount of uncoupled Zr(IV) centers, which serve as defects in the frameworks. − Additionally, the level of defects increases considerably with the increasing chain length (from FA to OA), most likely due to the steric hindrance of the precoordinated fatty chains. Likewise, the fluorescence spectra also confirm the presence of defects (Figure d).…”

Section: Resultsmentioning

confidence: 99%

Defect-Rich Hierarchical Porous UiO-66(Zr) for Tunable Phosphate Removal

Liu

et al. 2021

Environ. Sci. Technol.

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The introduction of defects into hierarchical porous metal−organic frameworks (HP-MOFs) is of vital significance to boost their adsorption performance. Herein, an advanced template-assisted strategy has been developed to fine-tune the phosphate adsorption performance of HP-MOFs by dictating the type and number of defects in HP-UiO-66(Zr). To achieve this, monocarboxylic acids of varying chain lengths have been employed as template molecules to fabricate an array of defect-rich HP-UiO-66(Zr) derivatives following removal of the template. The asprepared HP-UiO-66(Zr) exhibits a higher sorption capacity and faster sorption rate compared to the pristine UiO-66(Zr). Particularly, the octanoic acid-modulated UiO-66(Zr) exhibits a high adsorption capacity of 186.6 mg P/g and an intraparticle diffusion rate of 6.19 mg/g•min 0.5 , which are 4.8 times and 1.9 times higher than those of pristine UiO-66(Zr), respectively. The results reveal that defect sites play a critical role in boosting the phosphate uptake performance, which is further confirmed by various advanced characterizations. Density functional theory (DFT) calculations reveal the important role of defects in not only providing additional sorption sites but also reducing the sorption energy between HP-UiO-66(Zr) and phosphate. In addition, the hierarchical pores in HP-UiO-66(Zr) can accelerate the phosphate diffusion toward the active sorption sites. This work presents a promising route to tailor the adsorption performance of MOF-based adsorbents via defect engineering.

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“…As expected, the degradation kinetics of BPA is inhibited with N 2 purging (0.013 min −1 ), suggesting the essential role of O 2 in H 2 O 2 production. 50 The influence of the flow rate on BPA degradation was also investigated. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%