Active composite photocatalyst synthesized from inactive Rh &amp; Sb doped TiO2 nanorods: Enhanced degradation of organic pollutants &amp; antibacterial activity under visible light irradiation

Kim, Su-Gyeong; Dhandole, Love Kumar; Seo, Young-Seok; Chung, Hee‐Suk; Chae, Weon‐Sik; Cho, Min; Jang, Jum Suk

doi:10.1016/j.apcata.2018.07.016

Cited by 39 publications

(14 citation statements)

References 54 publications

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“…Degussa P-25 is the most commonly commercial available semiconductor which has been widely applied in many environmental fields, particularly for the photo(electro)catalysts (PC and PEC) and the thermocatalysts (SCR) due to its non-toxic, non-reactive, and luminous properties. Anatase TiO 2 is the most utilized metallic oxide photocatalyst used for the applications of environmental remediation and pollution treatment [49].…”

Section: Metallic Oxidesmentioning

confidence: 99%

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

Yuan

Zheng

et al. 2021

Catalysts

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This article reviews the fundamental theories and reaction mechanisms of photocatalytic technologies with the assistance of electrical field for degrading multi-phase pollutants. Photo(electro)catalysis including photocatalytic oxidation (PCO) and photoelectrocatalytic oxidation (PECO) have been a potential technologies applied for the treatment of organic and inorganic compounds in the wastewaters and waste gases, which has been treated as a promising technique by using semiconductors as photo(electro)catalysts to convert light or electrical energy to chemical energy. Combining photocatalytic processes with electrical field is an option to effectively decompose organic and inorganic pollutants. Although photocatalytic oxidation techniques have been used to decompose multi-phase pollutants, developing efficient advanced oxidation technologies (AOTs) by combining photocatalysis with electrical potential is urgently demanded in the future. This article reviews the most recent progress and the advances in the field of photocatalytic technologies combined with external electrical field, including the characterization of nano-sized photo(electro)catalysts, the degradation of multi-phase pollutants, and the development of electrical assisted photocatalytic technologies for the potential application on the treatment of organic and inorganic compounds in the wastewaters and waste gases. Innovative oxidation techniques regarding photo(electro)catalytic reactions with and without oxidants are included in this review article.

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Section: Metallic Oxidesmentioning

confidence: 99%

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

Yuan

Zheng

et al. 2021

Catalysts

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“…Some different types of materials were used to prepare composite materials with greatly enhanced activities. [ 21–23 ]…”

Section: Introductionmentioning

confidence: 99%

Effects of ZSM‐5 Treatment on the Properties of Gd₂Ti₂O₇‐nHZSM‐5 Composites for RBR‐X3B Degradation

Jiao

Zhang

2021

Part & Part Syst Charact

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an effective method to improve light absorption property of some kinds of materials, [12,13] and rare earth doping into titania could significantly enhanced the efficiency on organic pollutant degradation. [14,15] Titanate is another well-studied photocatalyst for organic pollutant degradation. [16][17][18][19][20] Wastewater treatment efficiency depended on the activity of photocatalyst, and modification of the materials could lead to an improved activity or to meet special requirements of a wastewater treatment process. Some different types of materials were used to prepare composite materials with greatly enhanced activities. [21][22][23] Photocatalysts were also prepared in the supported forms for a better waterphotocatalyst separation after treatment. [24][25][26] However, the supported photocatalyst in a flat surface usually had weaker activity than powders. Alternatively, photocatalyst was supported on porous zeolites. The obtained powders could be easily separated from the treated water, and a very interesting finding was an improved activity of photocatalyst in the supported form. HZSM-5 was used to prepare TiO 2 -zeolite and titanatezeolite composites in our previous works. [27][28][29] Degradation efficiencies of the photocatalysts were significantly enhanced after supporting.The properties of titanate-zeolite composite apparently depended on the properties of zeolite. Since HZSM-5 zeolite was prepared from Na-type ZSM-5 in a hydrochloric acid solution, the properties of HZSM-5 depended on hydrochloric acid solution concentration. In this work, Gd 2 Ti 2 O 7 -nHZSM-5 composite was prepared to study the influences of hydrochloric acid solution concentration on the characterization results and on the performance of Gd 2 Ti 2 O 7 -nHZSM-5 composite. Results and Discussions Surface Images of GTO and GTO-nZThe surface morphologies of GTO and GTO-nZ composites are presented in Figure 1. The sol-gel synthesized GTO had an irregular shape, and the particle size coluld be larger than 10 µm. Some small particles were along with the big ones because the materials were ground after calcination. Gd 2 Ti 2 O 7 -nHZSM-5 (GTO-nZ) composites are prepared using HZSM-5 zeolite via a sol-gel route. The hydrochloric acid concentration in zeolite treatment can affect the properties of GTO-nZ composites. GTO has a typical pyrochlore phase Gd 2 Ti 2 O 7 , and HZSM-5 zeolite does not have noticeable influences on GTO crystal formation. The bandgap energies are 3.77, 3.73, 3.67, 3.65, and 3.64 eV for GTO-nZ composites when hydrochloric acid concentration is 0, 0.2, 0.3, 0.5, and 1 mol L −1 , respectively. The isotherms of GTO-nZ composites are classified as IUPAC type IV of mesoporous material, while the adsorbed nitrogen quantities on GTO-nZ composites are much larger than the nitrogen quantity on GTO. The small amount of HZSM-5 zeolite can improve the porosity of GTO in the composites, and the surface area of GTO in the composites is significantly enlarged. The hydrochloric acid concentration has an apparent influence on the ...

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“…For instance, within studies of catalytic degradation of pollutants, the co-doping effect of rhodium and antimony on TiO 2 reduces the band-gap energy and lead to a better photocatalytic activity if compared with a non-doped TiO 2 system. 21 Moreover, it could be interesting to explore the electronic properties of large clusters in terms, for instance, of their possibility to act as nanocapacitors and be able to reversibly accept and release electrons. Those multivalent features have been previously observed in similar species possessing specific ad hoc conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Beside its academic relevance, it could be interesting to study the combination of those two elements for applications in other fields. For instance, within studies of catalytic degradation of pollutants, the co-doping effect of rhodium and antimony on TiO 2 reduces the band-gap energy and lead to a better photocatalytic activity if compared with a non-doped TiO 2 system . Moreover, it could be interesting to explore the electronic properties of large clusters in terms, for instance, of their possibility to act as nanocapacitors and be able to reversibly accept and release electrons.…”

Section: Introductionmentioning

confidence: 99%

“…This species slightly deviates from the PSEPT; nevertheless, the theory has proved to be not always appropriate to predict the CVEs number as the cluster nuclearity increases. 36 Ultimately, [Rh 10 Sb(CO) 21 PPh 3 ] 3− should present 142 CVEs, since its structure can be seen as a closo-bicapped square antiprism exhibiting 7N + 1 MOs, or 14N + 2 CVEs. As a matter of fact, this compound shows 142 CVEs, given by the 9 × 10 rhodium atoms (90), the 2 × 21 carbonyl ligands (42), the 5 × 1 Sb atom (5), and the negative charge (3), proving to conform to the PSEPT.…”

Section: ■ Introductionmentioning

confidence: 99%

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Rh–Sb Nanoclusters: Synthesis, Structure, and Electrochemical Studies of the Atomically Precise [Rh₂₀Sb₃(CO)₃₆]^3– and [Rh₂₁Sb₂(CO)₃₈]^5– Carbonyl Compounds

et al. 2020

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The reactivity of [Rh 7 (CO) 16 ] 3– with SbCl 3 has been deeply investigated with the aim of finding a new approach to prepare atomically precise metalloid clusters. In particular, by varying the stoichiometric ratios, the reaction atmosphere (carbon monoxide or nitrogen), the solvent, and by working at room temperature and low pressure, we were able to prepare two large carbonyl clusters of nanometer size, namely, [Rh 20 Sb 3 (CO) 36 ] 3– and [Rh 21 Sb 2 (CO) 38 ] 5– . A third large species composed of 28 metal atoms was isolated, but its exact formulation in terms of metal stoichiometry could not be incontrovertibly confirmed. We also adopted an alternative approach to synthesize nanoclusters, by decomposing the already known [Rh 12 Sb(CO) 27 ] 3– species with PPh 3 , willing to generate unsaturated fragments that could condense to larger species. This strategy resulted in the formation of the lower-nuclearity [Rh 10 Sb(CO) 21 PPh 3 ] 3– heteroleptic cluster instead. All three new compounds were characterized by IR spectroscopy, and their molecular structures were fully established by single-crystal X-ray diffraction studies. These showed a distinct propensity for such clusters to adopt an icosahedral-based geometry. Their characterization was completed by ESI-MS and NMR studies. The electronic properties of the high-yield [Rh 21 Sb 2 (CO) 38 ] 5– cluster were studied through cyclic voltammetry and in situ infrared spectroelectrochemistry, and the obtained results indicate a multivalent nature.

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Active composite photocatalyst synthesized from inactive Rh & Sb doped TiO2 nanorods: Enhanced degradation of organic pollutants & antibacterial activity under visible light irradiation

Cited by 39 publications

References 54 publications

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

Effects of ZSM‐5 Treatment on the Properties of Gd₂Ti₂O₇‐nHZSM‐5 Composites for RBR‐X3B Degradation

Rh–Sb Nanoclusters: Synthesis, Structure, and Electrochemical Studies of the Atomically Precise [Rh₂₀Sb₃(CO)₃₆]^3– and [Rh₂₁Sb₂(CO)₃₈]^5– Carbonyl Compounds

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Active composite photocatalyst synthesized from inactive Rh & Sb doped TiO2 nanorods: Enhanced degradation of organic pollutants & antibacterial activity under visible light irradiation

Cited by 39 publications

References 54 publications

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

Effects of ZSM‐5 Treatment on the Properties of Gd2Ti2O7‐nHZSM‐5 Composites for RBR‐X3B Degradation

Rh–Sb Nanoclusters: Synthesis, Structure, and Electrochemical Studies of the Atomically Precise [Rh20Sb3(CO)36]3– and [Rh21Sb2(CO)38]5– Carbonyl Compounds

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Effects of ZSM‐5 Treatment on the Properties of Gd₂Ti₂O₇‐nHZSM‐5 Composites for RBR‐X3B Degradation

Rh–Sb Nanoclusters: Synthesis, Structure, and Electrochemical Studies of the Atomically Precise [Rh₂₀Sb₃(CO)₃₆]^3– and [Rh₂₁Sb₂(CO)₃₈]^5– Carbonyl Compounds