Visible active N, S co-doped TiO2/graphene photocatalysts for the degradation of hazardous dyes

Appavu, Brindha; Thiripuranthagan, Sivakumar

doi:10.1016/j.jphotochem.2017.03.010

Cited by 134 publications

(44 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The typical changes are the shifting of the common Raman peaks of TiO 2 . Brindha and Sivakumar [79] verified Raman peaks shifts from 519 to 513 cm −1 , 399 to 396 cm −1 , and 197 to 194 cm −1 for N, S co-doped TiO 2 prepared by the hydrothermal method. The authors related this change to N, S-doping, but did not discuss the roles of N and S on this perturbation.…”

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 85%

“…This can also present advantages in terms of band-gap reduction [12,76], allowing the best photocatalytic performance when using visible light. Brindha and Sivakumar [79] found that the N, S co-doped TiO 2 prepared by the hydrothermal method verified no significant changes on the XRD patterns when compared to the anatase phase of TiO 2 . In the same way, Li et al [32] verified that the incorporation of N and S onto the TiO 2 structure using thiourea as an N and S source does not promote modifications on the crystalline phase of pure TiO 2 .…”

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 97%

“…N-TiO 2 shows, as described above, some advantages regarding band-gap reduction, which would allow the utilization of visible light and/or sunlight radiation in photocatalytic degradation processes. The presence of other dopants can place a mid-gap between the valence and conduction band, which permits the reduction of the typical band gap of TiO 2 [78,79]. On the other hand, some dopants are not able to reduce the band-gap width [45].…”

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 99%

“…FT-IR analysis is important to verify whether the co-doping occurs at the lattice, establishing bonds with Ti or O. The presence of S on the N-TiO 2 lattice can be identified by the peak detected at 1055 cm −1 , which can be attributed to the Ti-O-S bond [79,85]. On the other hand, the peak at 1217 cm −1 can be attributed to the surface-adsorbed SO 4 2− , which is the result of some unreacted precursor [59].…”

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 99%

“…Therefore, considering the recovery of the catalyst, in the literature, studies can be found that are related to the immobilization of doped TiO 2 on suitable supports or even TiO 2 nanostructures, such as nanotubes arrays supported on titanium foils [106][107][108][109]. The immobilization of doped TiO 2 can occur in different types of substrates such as hollow glass spheres [110], reactor walls [111], membrane reactors [112], synthetic polymers [55,113,114], and graphene [79]. The most used methods for supporting titanium dioxide particles on a suitable substrate is dip coating (or the sol-gel method) [115], chemical vapor deposition [116], the hydrothermal method [117], and the solvent-casting method [55].…”

Section: More Than Powdermentioning

confidence: 99%

See 4 more Smart Citations

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

Gomes

Lincho

Domingues

et al. 2019

Water

134

View full text Add to dashboard Cite

Titanium dioxide is the most used photocatalyst in wastewater treatment; its semiconductor capacity allows the indirect production of reactive oxidative species. The main drawback of the application of TiO2 is related to its high band-gap energy. The nonmetal that is most often used as the doping element is nitrogen, which is due to its capacity to reduce the band-gap energy at low preparation costs. There are multiple and assorted methods of preparation. The main advantages and disadvantages of a wide range of preparation methods were discussed in this paper. Different sources of N were also analyzed, and their individual impact on the characteristics of N–TiO2 was assessed. The core of this paper was focused on the large spectrum of analytical techniques to detect modifications in the TiO2 structure from the incorporation of N. The effect of N–TiO2 co-doping was also analyzed, as well as the main characteristics that are relevant to the performance of the catalyst, such as its particle size, surface area, quantum size effect, crystalline phases, and the hydrophilicity of the catalyst surface. Powder is the most used form of N–TiO2, but the economic benefits and applications involving continuous reactors were also analyzed with supported N–TiO2. Moreover, the degradation of contaminants emerging from water and wastewater using N–TiO2 and co-doped TiO2 was also discussed.

show abstract

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 85%

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 97%

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 99%

Section: Effect Of N-tio 2 Co-dopingmentioning

confidence: 99%

Section: More Than Powdermentioning

confidence: 99%

See 3 more Smart Citations

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

Gomes

Lincho

Domingues

et al. 2019

Water

134

View full text Add to dashboard Cite

show abstract

Nanotechnology: An Emerging Field for Sustainable Water Resources

Singh

Ambika

2018

Nanotechnology for Sustainable Water Resources

View full text Add to dashboard Cite

Remediation of Fouling on Painted Steel Roofing via Solar Energy Assisted Photocatalytic Self‐Cleaning Technology: Recent Developments and Future Perspectives

Fernando¹,

Ray²,

Simpson³

et al. 2022

Adv Eng Mater

View full text Add to dashboard Cite

Rainwater harvesting on rooves is a sustainable solution for global water scarcity. The contamination of roofing materials due to biological organisms and other environmental pollutants limits the utilization of roof harvested rainwater for domestic and industrial applications. Similarly, roof contamination leads to several aesthetic, functional, and environmental concerns highlighting the importance of developing green self-cleaning technology for roofing applications. Solar-energy-driven semiconductor-based photocatalytic self-cleaning coatings are a promising approach to minimizing roof contamination against both biological and non-biological pollutants. However, the development of such technology on painted steel substrates for long-term outdoor applications has become limited due to the number of challenges are analyzed in this review. Accordingly, challenges, recent developments, and future perspectives of developing and evaluating the performance of photocatalytic self-cleaning coating systems for roofing applications have been critically reviewed in this article analyzing the research findings of recent studies.

show abstract

Visible active N, S co-doped TiO2/graphene photocatalysts for the degradation of hazardous dyes

Cited by 134 publications

References 61 publications

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

N–TiO2 Photocatalysts: A Review of Their Characteristics and Capacity for Emerging Contaminants Removal

Nanotechnology: An Emerging Field for Sustainable Water Resources

Remediation of Fouling on Painted Steel Roofing via Solar Energy Assisted Photocatalytic Self‐Cleaning Technology: Recent Developments and Future Perspectives

Contact Info

Product

Resources

About