Near-infrared-activated Z-scheme NaYF4:Yb/Tm@Ag3PO4/Ag@g-C3N4 photocatalyst for enhanced H2 evolution under simulated solar light irradiation

Murali, G.; Vattikuti, S.V. Prabhakar; Kshetri, Yuwaraj K.; Lee, Hyungjin; Modigunta, Jeevan Kumar Reddy; Reddy, Ch. Seshendra; Park, Seongmin; Lee, Seongeun; Poornaprakash, B.; Lee, Hwi-Young; Park, Young Ho; Lee, Jihoon; In, Insik

doi:10.1016/j.cej.2021.129687

Cited by 88 publications

(31 citation statements)

References 60 publications

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“…Exploiting the clean, abundant, and inexhaustible solar energy by utilizing solar-light-driven photocatalytic reactionswater splitting, pollutant degradation, nitrogen (N 2 ) photofixation, and carbon dioxide (CO 2 ) reductionhas been regarded as a feasible strategy to meet the ever-increasing energy demands of humans and to remedy the environmental crisis. − Solar light absorption, production of photogenerated charge carriers, photogenerated charge separation and transport, and interfacial charge transfer/reaction are the sequence of key events that occur in any photocatalytic system. , Enhancing the efficiency of any of these events would eventually upgrade the overall performance of the photocatalytic reaction or lead to efficient utilization of solar energy. , Therefore, a tremendous amount of research has been devoted toward the preparation of photocatalytic materials with (1) a broader range of solar light absorption; (2) abundant active sites on the surface; and (3) effective charge separation ability within the bulk and on the surface, through various strategies and designs to maximize solar energy utilization.…”

Section: Introductionmentioning

confidence: 99%

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

et al. 2022

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Photocatalytic water splitting, CO2 reduction, and pollutant degradation have emerged as promising strategies to remedy the existing environmental and energy crises. However, grafting of expensive and less abundant noble-metal cocatalysts on photocatalyst materials is a mandatory practice to achieve enhanced photocatalytic performance owing to the ability of the cocatalysts to extract electrons efficiently from the photocatalyst and enable rapid/enhanced catalytic reaction. Hence, developing highly efficient, inexpensive, and noble-metal-free cocatalysts composed of earth-abundant elements is considered as a noteworthy step toward considering photocatalysis as a more economical strategy. Recently, MXenes (two-dimensional (2D) transition-metal carbides, nitrides, and carbonitrides) have shown huge potential as alternatives for noble-metal cocatalysts. MXenes have several excellent properties, including atomically thin 2D morphology, metallic electrical conductivity, hydrophilic surface, and high specific surface area. In addition, they exhibit Gibbs free energy of intermediate H atom adsorption as close to zero and less than that of a commercial Pt-based cocatalyst, a Fermi level position above the H2 generation potential, and an excellent ability to capture and activate CO2 molecules. Therefore, there is a growing interest in MXene-based photocatalyst materials for various photocatalytic events. In this review, we focus on the recent advances in the synthesis of MXenes with 2D and 0D morphologies, the stability of MXenes, and MXene-based photocatalysts for H2 evolution, CO2 reduction, and pollutant degradation. The existing challenges and the possible future directions to enhance the photocatalytic performance of MXene-based photocatalysts are also discussed.

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Section: Introductionmentioning

confidence: 99%

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

et al. 2022

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“…Many scholars have proposed constructing core-shell structures such as NaYF 4 :Yb 3+ /Er 3+ @NaGdF 4 :Yb 3+ and NaYF 4 :Yb 3+ /Er 3+ @NaNdF 4 :Yb 3+ /Tm 3+ @NaGdF 4 :Yb 3+ [8][9][10]. Alternatively, use the reverse microemulsion method to construct a layer of silica or porous silica, such as NaYF 4 :Yb 3+ /Er 3+ @SiO 2 , or NaYF 4 :Yb 3+ /Er 3+ @NaGdF 4 :Yb 3+ @m-SiO 2 [11][12][13][14]. Au nanoparticles (AuNPs) are currently the mainstream biomaterials in tumor diagnosis and treatment applications [15,16].…”

Section: Introductionmentioning

confidence: 99%

Photodynamic Therapy and Multi-Modality Imaging of Up-Conversion Nanomaterial Doped with AuNPs

Zhang

Zang

et al. 2022

IJMS

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Two key concerns exist in contemporary cancer chemotherapy in clinic: limited therapeutic efficiency and substantial side effects in patients. In recent years, researchers have been investigating a revolutionary cancer treatment technique, and photodynamic therapy (PDT) has been proposed by many scholars. A drug for photodynamic cancer treatment was synthesized using the hydrothermal method, which has a high efficiency to release reactive oxygen species (ROS). It may also be utilized as a clear multi-modality bioimaging platform for photoacoustic imaging (PAI) due to its photothermal effect, computed tomography (CT), and magnetic resonance imaging (MRI). When compared to single-modality imaging, multi-modality imaging delivers far more thorough and precise details for cancer diagnosis. Furthermore, Au-doped up-conversion nanoparticles (UCNPs) have an exceptionally high luminous intensity. The Au-doped UCNPs, in particular, are non-toxic to tissues without laser at an 808 nm wavelength, endowing the as-prepared medications with outstanding therapeutic efficacy but exceptionally low side effects. These findings may encourage fresh effective imaging-guided approaches to meet the goal of photodynamic cancer therapy to be created.

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“…Many researchers proposed developing core-shell structures such as NaYF 4 : Yb 3+ /Er 3+ @NaGdF 4 : Yb 3+ and NaYF 4 : Yb 3+ /Er 3+ @NaNdF 4 : Yb 3+ /Tm 3+ @NaGdF 4 : Yb 3+ [9][10][11]. Alternatively, the material surface is covered with a biocompatible coating such as DSPE-PEG 2K and ICG [12][13][14]. Although these operations can reduce biological toxicity and meet the basic requirements for use in biological cells or animals, these structures will indeed reduce the luminous intensity of up-conversion luminescent materials [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

SiO2 Coated Up-Conversion Nanomaterial Doped with Ag Nanoparticles for Micro-CT Imaging

Zhang

Zang

et al. 2021

Nanomaterials

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In this study, a new method for synthesizing Ag-NaYF4:Yb3+/Er3+ @ SiO2 nanocomposites was introduced. Using a hydrothermal method, the synthesized Yb3+- and Er3+-codoped NaYF4 up-conversion luminescent materials and Ag nanoparticles were doped into up-conversion nanomaterials and coated with SiO2 up-conversion nanomaterials. This material is known as Ag-UCNPs@SiO2, it improves both the luminous intensity because of the doped Ag nanoparticles and has low cytotoxicity because of the SiO2 coating. The morphology of UCNPs was observed using scanning electron microscopy (SEM), and the mapping confirmed the successful doping of Ag nanoparticles. Successful coating of SiO2 was confirmed using transmission electron microscopy (TEM). Fluorescence spectra were used to compare changes in luminescence intensity before and after doping Ag nanoparticles. The reason for the increase in luminescence intensity after doping with Ag nanoparticles was simulated using first-principles calculations. The cytotoxicity of Ag-UCNPs@SiO2 was tested via the cell counting kit-8 (CCK-8) method, and its imaging ability was characterized using the micro-CT method.

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Near-infrared-activated Z-scheme NaYF4:Yb/Tm@Ag3PO4/Ag@g-C3N4 photocatalyst for enhanced H2 evolution under simulated solar light irradiation

Cited by 88 publications

References 60 publications

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

A Review on MXene Synthesis, Stability, and Photocatalytic Applications

Photodynamic Therapy and Multi-Modality Imaging of Up-Conversion Nanomaterial Doped with AuNPs

SiO2 Coated Up-Conversion Nanomaterial Doped with Ag Nanoparticles for Micro-CT Imaging

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