Novel nano-flowers of Nb2O5 by template free synthesis and enhanced photocatalytic response under visible light

Faryal Idrees; Chuanbao Cao; R. Ahmed; Faheem K. Butt; Sajid Butt; Muhammad Tahir; M. Tanveer; Imran Aslam; Zulfiqar Ali

doi:10.1166/sam.2015.2044

Novel nano-flowers of Nb₂O₅ by template free synthesis and enhanced photocatalytic response under visible light

Faryal Idrees, Chuanbao Cao^*, R. Ahmed, Faheem K. Butt, Sajid Butt, Muhammad Tahir, M. Tanveer, Imran Aslam, Zulfiqar Ali

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Niobium pentoxide (Nb₂O₅) has attracted considerable interest owing to its potential applications. A facile surfactant and template free hydrothermal method has been adopted to synthesize novel nanoflowers of Nb₂O₅. The incomplete oxidation process was completed by annealing in air at 400°C for 1 h. The initial band gap value varied from 3.1 eV to 2.9 eV with a red shift of 27.5 nm. Time dependent experiments were performed to understand growth mechanism. RhB under visible light was degraded by using Nb₂O₅ nanoflowers before and after annealing. The photdegradation constant k: 0.89 h_-1 and 2.62 h_-1 were calculated, respectively. The rate constant of Nb₂O₅ nanoflowers after annealing was found larger than commercial Nb₂O₅, Commercial TiO₂ Degussa P25, HTiNbO₅, N-TiO₂, SnNb₂O₆ nanosheets, Bi₃NbO₇ nanocomposites and C, N-codoped InOOH microspheres.

Original language	English
Pages (from-to)	1298-1303
Number of pages	6
Journal	Science of Advanced Materials
Volume	7
Issue number	7
DOIs	https://doi.org/10.1166/sam.2015.2044
Publication status	Published - 2015

Keywords

Hydrothermal
Nanoflowers
Optical properties
Photocatalysis
Semiconductor

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title = "Novel nano-flowers of Nb2O5 by template free synthesis and enhanced photocatalytic response under visible light",

abstract = "Niobium pentoxide (Nb2O5) has attracted considerable interest owing to its potential applications. A facile surfactant and template free hydrothermal method has been adopted to synthesize novel nanoflowers of Nb2O5. The incomplete oxidation process was completed by annealing in air at 400°C for 1 h. The initial band gap value varied from 3.1 eV to 2.9 eV with a red shift of 27.5 nm. Time dependent experiments were performed to understand growth mechanism. RhB under visible light was degraded by using Nb2O5 nanoflowers before and after annealing. The photdegradation constant k: 0.89 h-1 and 2.62 h-1 were calculated, respectively. The rate constant of Nb2O5 nanoflowers after annealing was found larger than commercial Nb2O5, Commercial TiO2 Degussa P25, HTiNbO5, N-TiO2, SnNb2O6 nanosheets, Bi3NbO7 nanocomposites and C, N-codoped InOOH microspheres.",

keywords = "Hydrothermal, Nanoflowers, Optical properties, Photocatalysis, Semiconductor",

author = "Faryal Idrees and Chuanbao Cao and R. Ahmed and Butt, {Faheem K.} and Sajid Butt and Muhammad Tahir and M. Tanveer and Imran Aslam and Zulfiqar Ali",

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year = "2015",

doi = "10.1166/sam.2015.2044",

language = "English",

volume = "7",

pages = "1298--1303",

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T1 - Novel nano-flowers of Nb2O5 by template free synthesis and enhanced photocatalytic response under visible light

AU - Idrees, Faryal

AU - Cao, Chuanbao

AU - Ahmed, R.

AU - Butt, Faheem K.

AU - Butt, Sajid

AU - Tahir, Muhammad

AU - Tanveer, M.

AU - Aslam, Imran

AU - Ali, Zulfiqar

PY - 2015

Y1 - 2015

N2 - Niobium pentoxide (Nb2O5) has attracted considerable interest owing to its potential applications. A facile surfactant and template free hydrothermal method has been adopted to synthesize novel nanoflowers of Nb2O5. The incomplete oxidation process was completed by annealing in air at 400°C for 1 h. The initial band gap value varied from 3.1 eV to 2.9 eV with a red shift of 27.5 nm. Time dependent experiments were performed to understand growth mechanism. RhB under visible light was degraded by using Nb2O5 nanoflowers before and after annealing. The photdegradation constant k: 0.89 h-1 and 2.62 h-1 were calculated, respectively. The rate constant of Nb2O5 nanoflowers after annealing was found larger than commercial Nb2O5, Commercial TiO2 Degussa P25, HTiNbO5, N-TiO2, SnNb2O6 nanosheets, Bi3NbO7 nanocomposites and C, N-codoped InOOH microspheres.

AB - Niobium pentoxide (Nb2O5) has attracted considerable interest owing to its potential applications. A facile surfactant and template free hydrothermal method has been adopted to synthesize novel nanoflowers of Nb2O5. The incomplete oxidation process was completed by annealing in air at 400°C for 1 h. The initial band gap value varied from 3.1 eV to 2.9 eV with a red shift of 27.5 nm. Time dependent experiments were performed to understand growth mechanism. RhB under visible light was degraded by using Nb2O5 nanoflowers before and after annealing. The photdegradation constant k: 0.89 h-1 and 2.62 h-1 were calculated, respectively. The rate constant of Nb2O5 nanoflowers after annealing was found larger than commercial Nb2O5, Commercial TiO2 Degussa P25, HTiNbO5, N-TiO2, SnNb2O6 nanosheets, Bi3NbO7 nanocomposites and C, N-codoped InOOH microspheres.

KW - Hydrothermal

KW - Nanoflowers

KW - Optical properties

KW - Photocatalysis

KW - Semiconductor

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DO - 10.1166/sam.2015.2044

M3 - Article

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SN - 1947-2935

VL - 7

SP - 1298

EP - 1303

JO - Science of Advanced Materials

JF - Science of Advanced Materials

IS - 7

ER -

Novel nano-flowers of Nb₂O₅ by template free synthesis and enhanced photocatalytic response under visible light

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