Preparation and photocatalytic application of a S, Nd double doped nano-TiO<sub>2</sub> photocatalyst

Wang, Shuo; Bai, Liming; Ao, Xinling

doi:10.1039/c8ra06778c

Cited by 23 publications

(6 citation statements)

References 31 publications

(31 reference statements)

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“…The antioxidant potential of the prepared samples was monitored via the DPPH (2, 2-diphenyl-1-picrylhidrazyl) method following the protocols of Helmy et al [ 21 ]. Initially, the DPPH (1.97 mg) was dissolved in methanol (50 mL) to prepare a stock solution and it was stored at 4 °C to use it further in the experiment.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, doping rare earth metals into TiO 2 is also a useful method to advance its photocatalysis efficiency through the reduction in the charge carriers’ recombination [ 19 ]. Compared with other rare earth metals, Nd is an efficient element that has gained attention in many studies due to its good properties [ 20 , 21 ]. Nd-doped TiO 2 has the ability to reduce band gaps and overcome the reunion of charges for enhanced photocatalytic activity [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Novel Nd-N/TiO2 Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach

et al. 2022

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In this study, photocatalysis was employed to degrade a wastewater pollutant (AB-29 dye) under visible light irradiation. For this purpose, nitrogen (N)- and neodymium (Nd)-doped TiO2 nanoparticles were prepared using the simple hydrothermal method. X-ray diffraction (XRD) revealed an anatase phase structure of the Nd-N/TiO2 photocatalyst, whereas properties including the surface morphology, chemical states/electronics structure and optical structure were determined using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV–visible (UV–vis.) and photoluminescence (PL) spectroscopies. Photocatalytic testing of the prepared nanomaterials was performed to remove acid blue-29 (AB-29) dye under visible-light exposure. The prepared Nd-N/TiO2 nanoparticles demonstrated a superior photocatalytic activity and the decolorization efficiency was about 92% after visible-light illumination for 1 h and 20 min, while N/TiO2, Nd/TiO2 and TiO2 only showed a 67%, 43% and 31% decolorization efficiency, respectively. The enhanced photocatalytic activity of the Nd-N/TiO2 photocatalyst was due to a decrease in the electron/hole’s recombination and the increased absorption of TiO2 in the visible range. The reusability results showed that the average photocatalytic activity decrease for all the samples was only about 16% after five consecutive cycles, indicating a good stability of the prepared nanomaterials. Moreover, the radical scavenging activity of the prepared nanomaterials was evaluated using the DPPH method. The novel Nd-N/TiO2 exhibited a higher antioxidant activity compared to all the other samples.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Nd-N/TiO2 Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach

et al. 2022

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“…Metal oxides are often used as photocatalysts. Among many photocatalysts, ZnO has become the core research direction of photocatalytic degradation of water pollution because of its wide band gap (3.3 ev-3.4 ev), high exciton binding energy and excellent room temperature luminescence properties [1][2][3][4]. But at the same time, ZnO also has some disadvantages in catalysis.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Photocatalytic Degradation of ZnO Graphene Composites

Guan¹,

An²,

Zhang³

2023

J. Phys.: Conf. Ser.

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A series of ZnO graphene composites with different reduced graphene oxide (RGO) contents (0%, 2%, 4%, 6% and 8% (mass fraction)) were prepared by solvothermal method. The composite samples were characterized by XRD, SEM and pl. The results show that all the composite samples doped with RGO do not change the structure of ZnO; Pure ZnO samples are spherical particles with grain size of about 40 nm. After adding RGO, the grain size of the samples is uneven, and the agglomeration of the composite samples increases gradually with the increase of RGO content; The emission peaks of all composites are near 373 nm. With the increase of RGO content, the intensity of the intrinsic emission peak of the composites decreases first and then increases. The introduction of RGO makes the absorption peak has a slight red shift, which improve the visible-light absorption ability of the composites. With the increase of RGO content, the photocatalytic performance of the composites increased first and then decreased. When the RGO content was 6% (mass fraction), the photocatalytic performance of the composites was the best, and the degradation rate and reaction rate constants reached 71.97% and 0.017 min-1 respectively.

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“…In order to improve the ability of TiO 2 to degrade organic pollutants, researchers have made many efforts. Coupling TiO 2 with other semiconductor or precious metal matrix composites or heterostructures provides a beneficial solution for defects in photocatalytic applications [17][18][19][20]; e.g. doping noble metals Au, Ag and Pt to increase the photocatalytic efficiency of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of pod-shaped TiO ₂ and Ag@TiO ₂ nano burst tubes and their photocatalytic activity

Wang

Han

et al. 2019

R. Soc. open sci.

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The pod-shaped TiO 2 nano burst tubes (TiO 2 NBTs) were prepared by the combination of electrospinning and impregnation calcination with oxalic acid (H 2 C 2 O 4 ), polystyrene (PS) and tetrabutyl titanate. The silver nanoparticles (AgNPs) were loaded onto the surface of TiO 2 NBTs by ultraviolet light reduction method to prepare pod-shaped Ag@TiO 2 NBTs. In this work, we analysed the effect of the amount of oxalic acid on the cracking degree of TiO 2 NBTs; the effect of the concentration of AgNO 3 solution on the particle size and loading of AgNPs on the surface of TiO 2 NBTs. Scanning electron microscopy and transmission electron microscopy investigated the surface morphology of samples. X-ray diffraction and X-ray photoelectron spectroscopy characterized the structure and composition of samples. Rhodamine B (RhB) solution was used to evaluate the photocatalytic activity of pod-shaped TiO 2 NBTs and Ag@TiO 2 NBTs. The results showed that TiO 2 NBTs degraded 91.0% of RhB under ultraviolet light, Ag@TiO 2 NBTs degraded 95.5% under visible light for 75 and 60 min, respectively. The degradation process of both samples was consistent with the Langmuir–Hinshelwood first-order kinetic equation. Therefore, the catalytic performance of the sample is: Ag@TiO 2 NBTs > TiO 2 NBTs > TiO 2 nanotubes.

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Preparation and photocatalytic application of a S, Nd double doped nano-TiO₂ photocatalyst

Abstract: Nowadays, water pollution is getting more and more severe in society, and recently the rational use of photocatalytic technology to treat sewage has become a hot spot for research.

Cited by 23 publications

References 31 publications

Novel Nd-N/TiO2 Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach

Novel Nd-N/TiO2 Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach

Preparation and Photocatalytic Degradation of ZnO Graphene Composites

Preparation of pod-shaped TiO ₂ and Ag@TiO ₂ nano burst tubes and their photocatalytic activity

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Preparation and photocatalytic application of a S, Nd double doped nano-TiO2 photocatalyst

Abstract: Nowadays, water pollution is getting more and more severe in society, and recently the rational use of photocatalytic technology to treat sewage has become a hot spot for research.

Cited by 23 publications

References 31 publications

Novel Nd-N/TiO2 Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach

Novel Nd-N/TiO2 Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach

Preparation and Photocatalytic Degradation of ZnO Graphene Composites

Preparation of pod-shaped TiO 2 and Ag@TiO 2 nano burst tubes and their photocatalytic activity

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Preparation and photocatalytic application of a S, Nd double doped nano-TiO₂ photocatalyst

Preparation of pod-shaped TiO ₂ and Ag@TiO ₂ nano burst tubes and their photocatalytic activity