Spatial charge separation on strongly coupled 2D-hybrid of rGO/La2Ti2O7/NiFe-LDH heterostructures for highly efficient noble metal free photocatalytic hydrogen generation

Boppella, Ramireddy; Choi, Chi Hun; Moon, Jooho; Kim, Dong Ha

doi:10.1016/j.apcatb.2018.07.063

Cited by 116 publications

(61 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For ND/LDH, all the diffraction peaks of ND and LDH were observed correspondingly, whereas the diffraction peaks of ND coincided with the partial peaks of LDH. In addition, a new diffraction peak at 22.96 corresponding to the (006) crystal plane of LDH phase was detected in the ND/LDH spectrum [35][36][37]. These results adequately confirmed the hydrotalcite-like structure of ND/LDH and the successful hybridization of ND and LDH.…”

Section: Characterization Of Nd/ldhsupporting

confidence: 66%

“…The peak at 1385 cm −1 was ascribed to the stretching vibration of the C-O structure which was from the carbonate located in the anionic interlayer of LDH, or from the oxygen-containing group on the ND surface. The peaks at 1050 and 505 cm −1 were ascribed to Cu-O-Fe stretching vibration and metallic bond vibration (M-OH), respectively [1,37,44]. These results also indicated that the as-prepared ND/LDH possessed a hydrotalcite-like structure, and the copper and iron atoms in the metal layer were connected by an oxygen atom.…”

Section: Characterization Of Nd/ldhmentioning

confidence: 75%

“…10, 33.28, 35.90, 39.24, 44.66, 64.98 and 78.08, corresponding to the (101), (009), (012), (015), (018), (116) and (1016) crystal planes of the LDH phase referred to in PDF card No. 89-461 and in the literature [35][36][37]. The remaining two outstanding diffraction peaks were located at 29.62 and 48.58, corresponding to (005) and (107) crystal planes of the LDH phase referred to in PDF card No.…”

Section: Characterization Of Nd/ldhmentioning

confidence: 87%

See 2 more Smart Citations

Hybridization of Nanodiamond and CuFe-LDH as Heterogeneous Photoactivator for Visible-Light Driven Photo-Fenton Reaction: Photocatalytic Activity and Mechanism

Liu

et al. 2019

Catalysts

View full text Add to dashboard Cite

Establishing a heterojunction for two kinds of semiconductor catalysts is a promising way to enhance photocatalytic activity. In this study, nanodiamond (ND) and CuFe-layered double hydroxide (LDH) were hybridized by a simple coprecipitation method as a novel heterojunction to photoactivate H2O2. The ND/LDH possessed a hydrotalcite-like structure, large specific surface area (SBET = 99.16 m2/g), strong absorption of visible-light and low band gap (Eg = 0.94 eV). Under the conditions of ND/LDH dosage 0.0667 g/L, H2O2 concentration 19.6 mmol/L, and without initial pH adjustment, 93.5% of 10 mg/L methylene blue (MB) was degraded within 120 minutes, while only 78.3% of MB was degraded in the presence of LDH instead of ND/LDH. The ND/LDH exhibited excellent stability and maintained relatively high activity, sufficient to photoactivate H2O2 even after five recycles. The mechanism study revealed that in the heterojunction of ND/LDH, the photoelectrons transferred from the valence band of LDH (Cu/Fe 3d t2g) to the conduction band of LDH (Cu/Fe 3d eg) could spontaneously migrate onto the conduction band of ND, promoting the separation of photo-induced charges. Thus, the photoelectrons had sufficient time to accelerate the redox cycles of Cu3+/Cu2+ and Fe3+/Fe2+ to photoactivate H2O2 to produce hydroxyl radicals, resulting in excellent photo-Fenton efficiency on MB degradation.

show abstract

Section: Characterization Of Nd/ldhsupporting

confidence: 66%

Section: Characterization Of Nd/ldhmentioning

confidence: 75%

Section: Characterization Of Nd/ldhmentioning

confidence: 87%

See 1 more Smart Citation

Hybridization of Nanodiamond and CuFe-LDH as Heterogeneous Photoactivator for Visible-Light Driven Photo-Fenton Reaction: Photocatalytic Activity and Mechanism

Liu

et al. 2019

Catalysts

View full text Add to dashboard Cite

show abstract

“…2D heterostructures are a new class of materials that are often created by the vertical stacking of 2D layers of different materials. The resulting materials present opportunities for engineering structures with atomic precision in many areas beyond energy storage, including thermoelectrics, optoelectronics, field‐effect transistors, and photocatalysis . The fabrication and characterization of 2D heterostructures has been described in recent review articles .…”

Section: Energy Storagementioning

confidence: 99%

Intercalation of Layered Materials from Bulk to 2D

et al. 2019

View full text Add to dashboard Cite

Intercalation in few‐layer (2D) materials is a rapidly growing area of research to develop next‐generation energy‐storage and optoelectronic devices, including batteries, sensors, transistors, and electrically tunable displays. Identifying fundamental differences between intercalation in bulk and 2D materials will play a key role in developing functional devices. Herein, advances in few‐layer intercalation are addressed in the historical context of bulk intercalation. First, synthesis methods and structural properties are discussed, emphasizing electrochemical techniques, the mechanism of intercalation, and the formation of a solid‐electrolyte interphase. To address fundamental differences between bulk and 2D materials, scaling relationships describe how intercalation kinetics, structure, and electronic and optical properties depend on material thickness and lateral dimension. Here, diffusion rates, pseudocapacity, limits of staging, and electronic structure are compared for bulk and 2D materials. Next, the optoelectronic properties are summarized, focusing on charge transfer, conductivity, and electronic structure. For energy devices, opportunities also emerge to design van der Waals heterostructures with high capacities and excellent cycling performance. Initial studies of heterostructured electrodes are compared to state‐of‐the‐art battery materials. Finally, challenges and opportunities are presented for 2D materials in energy and optoelectronic applications, along with promising research directions in synthesis and characterization to engineer 2D materials for superior devices.

show abstract

“…H 2 , as a renewable energy with high energy density and no secondary pollution, can effectively alleviate the current energy crisis and environmental pollution. In consideration of the advantages of ultrathin 2D semiconductors, various efforts have been devoted to construct high‐efficiency photocatalytic H 2 production photocatalysts and the study results undoubtedly demonstrated that the ultrathin 2D materials show excellent photocatalytic H 2 production activity . However, most semiconductors exhibit low yield of the H 2 due to the high recombination rate of photogenerated electrons and holes.…”

Section: Energy and Environment Applicationsmentioning

confidence: 99%

Ultrathin Two‐Dimensional Semiconductors for Photocatalysis in Energy and Environment Applications

Zhu

2019

ChemCatChem

View full text Add to dashboard Cite

The search for highly active photocatalysts remains one of the most challenging tasks for realizing efficient solar energy utilization. Inspired by their unique and excellent physicochemical properties, ultrathin two-dimensional (2D) semiconductors present great advantages in photocatalytic researches. In this review, we summarize the state-of-art progress on the ultrathin 2D semiconductors with a particular emphasis on their recent advances in energy and environment applications. First, we introduce the historical developments of 2D nanomaterials, and outline their advantages in terms of photocatalysis. Second, the classifications of ultrathin 2D semiconductors are summarized based on their structure and compositions. Further, various energy and environment applications including water splitting, CO 2 reduction, N 2 fixation, organic syntheses, NO x removal, water treatment, and sterilization in recent years (mainly in the recent 3 years) are highlighted in detail. Finally, the personal perspectives on future challenges and outlooks in the field of energy and environment applications are featured.[a] Dr.

show abstract

Spatial charge separation on strongly coupled 2D-hybrid of rGO/La2Ti2O7/NiFe-LDH heterostructures for highly efficient noble metal free photocatalytic hydrogen generation

Cited by 116 publications

References 65 publications

Hybridization of Nanodiamond and CuFe-LDH as Heterogeneous Photoactivator for Visible-Light Driven Photo-Fenton Reaction: Photocatalytic Activity and Mechanism

Hybridization of Nanodiamond and CuFe-LDH as Heterogeneous Photoactivator for Visible-Light Driven Photo-Fenton Reaction: Photocatalytic Activity and Mechanism

Intercalation of Layered Materials from Bulk to 2D

Ultrathin Two‐Dimensional Semiconductors for Photocatalysis in Energy and Environment Applications

Contact Info

Product

Resources

About