DFT and experimental investigations on the photocatalytic activities of NiO nanobelts for removal of organic pollutants

Kitchamsetti, Narasimharao; Ramteke, Mrunmay S.; Rondiya, Sachin R.; Mulani, Sameena R.; Patil, Madhuri; Cross, Russell W.; Dzade, Nelson Y.; Devan, Rupesh S.

doi:10.1016/j.jallcom.2020.157337

Cited by 69 publications

(42 citation statements)

References 37 publications

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“…A huge amount of effluent is released throughout dyeing processes into water bodies and the surrounding environment. Dye pollutants can cause dermatitis, allergy, cancer, kidney dysfunction, skin irritation, and problems with the reproductive system and liver in humans 4 – 7 . Several dyes such as methylene blue (MB), congo red (CR), rhodamine B (RhB), and colorless compound phenol has been used extensively in various fields.…”

Section: Introductionmentioning

confidence: 99%

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite for enhanced visible-light utilization to degrade organic pollutants by lowering TiO2-bandgap

Akter

Hanif

Islam

et al. 2021

Sci Rep

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A convenient route was developed for the selective preparation of two stable nanocomposites, Ti3+/TiO2/CNT (labeled as TTOC-1 and TTOC-3) and Ti3+/TiO2/carbon layer (labeled as TTOC-2), from the same precursor by varying the amount of single-walled carbon nanotubes used in the synthesis. TiO2 is an effective photocatalyst; however, its wide bandgap limits its usefulness to the UV region. As a solution to this problem, our prepared nanocomposites exhibit a small bandgap and wide visible-light (VL) absorption because of the introduction of carbonaceous species and Ti3+ vacancies. The photocatalytic efficiency of the nanocomposites was examined via the degradation of methylene blue dye under VL. Excellent photocatalytic activity of 83%, 98%, and 93% was observed for TTOC-1, TTOC-2, and TTOC-3 nanocomposites within 25 min. In addition, the photocatalytic degradation efficiency of TTOC-2 toward methyl orange, phenol, rhodamine B, and congo red was 28%, 69%, 71%, and 91%, respectively, under similar experimental conditions after 25 min. Higher reusability and structural integrity of the as-synthesized photocatalyst were confirmed within five consecutive runs by photocatalytic test and X-ray diffraction analysis, respectively. The resulting nanocomposites provide new insights into the development of VL-active and stable photocatalysts with high efficiencies.

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Section: Introductionmentioning

confidence: 99%

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite for enhanced visible-light utilization to degrade organic pollutants by lowering TiO2-bandgap

Akter

Hanif

Islam

et al. 2021

Sci Rep

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Section: Main Textmentioning

confidence: 99%

“…and photocatalytic degradation 4,9,10 . Among the methods for the elimination of dyes, photocatalytic degradation and adsorption are acknowledged as e cient, inexpensive, and environmentally friendly techniques.…”

mentioning

confidence: 99%

“…A huge amount of e uent is released throughout dyeing processes into water bodies and the surrounding environment. Dye pollutants can cause dermatitis, allergy, cancer, kidney dysfunction, skin irritation, and problems with the reproductive system and liver in humans [4][5][6][7] .Methylene blue (MB) is a cationic dye that has been used extensively in healthcare, including in several therapeutic and diagnostic procedures. It is commonly used as an antidote, redox agent, antihemoglobinemia medication, antiseptic, stain, and bactericide.…”

mentioning

confidence: 99%

“…MB is harmful to human health, causing irritation of the skin, respiratory tract, and eyes. It also causes permanent damage to the conjunctiva and cornea in human eyes [3][4][5][6] . Two other hazardous dyes are methyl orange (MO) and rhodamine B (RhB).…”

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confidence: 99%

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Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite photocatalysts for enhanced visible-light utilization to degrade organic pollutants by lowering the bandgap of TiO2

Akter

Hanif

Islam

et al. 2021

Preprint

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A convenient route was developed for the selective preparation of two stable nanocomposites, Ti3+/TiO2/CNT (labeled as TTOC-1 and TTOC-3) and Ti3+/TiO2/carbon layer (labeled as TTOC-2), from the same precursor by varying the amount of single-walled carbon nanotubes used in the synthesis. TiO2 is an effective photocatalyst; however, its wide bandgap limits its usefulness to the UV region. As a solution to this problem, our prepared nanocomposites exhibit a small bandgap and wide visible-light (VL) absorption because of the introduction of carbonaceous species and Ti3+ vacancies. The photocatalytic efficiency of the nanocomposites was examined via the degradation of methylene blue dye under VL. Excellent photocatalytic activity of 83%, 98%, and 93% was observed for TTOC-1, TTOC-2, and TTOC-3 nanocomposites within 25 min. In addition, the photocatalytic degradation efficiency of TTOC-2 toward rhodamine B was 71% and for methyl orange (MO) dye was 28% under similar experimental conditions, after 25 min. Higher reusability and structural integrity of the as-synthesized photocatalyst were confirmed within five consecutive runs by photocatalytic test and X-ray diffraction analysis, respectively. The resulting nanocomposites provide new insights into the development of VL-active and stable photocatalysts with high efficiencies.

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Visible light‐driven Z‐scheme NiO/BiO_2−x heterojunction for efficient degradation of organic pollutants in water

Shi

Tian

et al. 2022

Applied Organom Chemis

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In this study, Z-scheme NiO/BiO 2Àx heterojunction was successfully constructed by hydrothermal method, which can maintain strong redox potential and excellent visible light response and effectively improve the separation efficiency of photogenerated carrier. Under visible irradiation, the impact of different contents of NiO in NiO/BiO 2Àx on photocatalytic activity was explored, and the results shown that 3-NiO/BiO 2Àx had the highest photocatalytic activity. The degradation rate of 3-NiO/BiO 2Àx for methyl orange (MO) was 7.69 times and 19.7 times higher than pure BiO 2Àx and NiO, respectively. Moreover, the degradation rate of 3-NiO/BiO 2Àx for ciprofloxacin (CIP) was 7.54 times and 60.8 times higher than that of the pure BiO 2Àx and NiO, respectively. NiO/BiO 2Àx heterojunction can be used in the field of wastewater treatment due to their excellent degradation activity for organic pollutants.

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DFT and experimental investigations on the photocatalytic activities of NiO nanobelts for removal of organic pollutants

Cited by 69 publications

References 37 publications

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite for enhanced visible-light utilization to degrade organic pollutants by lowering TiO2-bandgap

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite for enhanced visible-light utilization to degrade organic pollutants by lowering TiO2-bandgap

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite photocatalysts for enhanced visible-light utilization to degrade organic pollutants by lowering the bandgap of TiO2

Visible light‐driven Z‐scheme NiO/BiO_2−x heterojunction for efficient degradation of organic pollutants in water

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DFT and experimental investigations on the photocatalytic activities of NiO nanobelts for removal of organic pollutants

Cited by 69 publications

References 37 publications

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite for enhanced visible-light utilization to degrade organic pollutants by lowering TiO2-bandgap

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite for enhanced visible-light utilization to degrade organic pollutants by lowering TiO2-bandgap

Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite photocatalysts for enhanced visible-light utilization to degrade organic pollutants by lowering the bandgap of TiO2

Visible light‐driven Z‐scheme NiO/BiO2−x heterojunction for efficient degradation of organic pollutants in water

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Visible light‐driven Z‐scheme NiO/BiO_2−x heterojunction for efficient degradation of organic pollutants in water