Away from TiO2: A critical minireview on the developing of new photocatalysts for degradation of contaminants in water

Shaham-Waldmann, Nurit; Paz, Yaron

doi:10.1016/j.mssp.2015.06.068

Cited by 102 publications

(23 citation statements)

References 103 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among the AOPs, particular attention has been given to heterogeneous photocatalysis based on materials such as TiO 2 , as they represent a promising and environmentally sustainable wastewater treatment technology. Their activity is based on the formation of highly reactive OH radicals which are nonselective and have a high oxidative power (E0 = +2.80 V) [ 24 , 25 ]. In the field of photocatalysis, a large number of new TiO 2 -based photocatalysts have been developed combining TiO 2 with other materials that can enhance its performance [ 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Diclofenac by Hydroxyapatite–TiO2 Composite Material: Identification of Transformation Products and Assessment of Toxicity

Murgolo¹,

Moreira

Piccirillo

et al. 2018

Materials

View full text Add to dashboard Cite

Diclofenac (DCF) is one of the most detected pharmaceuticals in environmental water matrices and is known to be recalcitrant to conventional wastewater treatment plants. In this study, degradation of DCF was performed in water by photolysis and photocatalysis using a new synthetized photocatalyst based on hydroxyapatite and TiO2 (HApTi). A degradation of 95% of the target compound was achieved in 24 h by a photocatalytic treatment employing the HApTi catalyst in comparison to only 60% removal by the photolytic process. The investigation of photo-transformation products was performed by means of UPLC-QTOF/MS/MS, and for 14 detected compounds in samples collected during treatment with HApTi, the chemical structure was proposed. The determination of transformation product (TP) toxicity was performed by using different assays: Daphnia magna acute toxicity test, Toxi-ChromoTest, and Lactuca sativa and Solanum lycopersicum germination inhibition test. Overall, the toxicity of the samples obtained from the photocatalytic experiment with HApTi decreased at the end of the treatment, showing the potential applicability of the catalyst for the removal of diclofenac and the detoxification of water matrices.

show abstract

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Diclofenac by Hydroxyapatite–TiO2 Composite Material: Identification of Transformation Products and Assessment of Toxicity

Murgolo¹,

Moreira

Piccirillo

et al. 2018

Materials

View full text Add to dashboard Cite

show abstract

“…The photolysis of phenol (inset figure) depicts a trifle removal of 2% (0.01 × 10 −2 mM min −1 ), implying that phenol is a highly stable pollutant. 43 For Nb 2 O 5 loading on FST, 5 Nb/FST demonstrated the maximum value of 1.70 × 10 −2 mM min −1 , followed by 1 Nb/FST, FST, 10 Nb/FST, and Nb 2 O 5 with 1.51 × 10 −2 , 1.30 × 10 −2 , 1.01 × 10 −2 and 0.07 × 10 −2 mM min −1 , respectively. The optimum pH and catalyst dosage for the maximum reaction was pH 5 and 0.1 g L −1 , respectively (Fig.…”

Section: Catalyst Characterization Morphological and Structural Analysesmentioning

confidence: 85%

Visible‐light driven photodegradation of phenol over niobium oxide‐loaded fibrous silica titania composite catalyst

Zakaria

Hassan

Ibrahim

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Heterogeneous photocatalysis has been demonstrated to be a promising alternative to treating emerging pollutants in wastewater. Phenol, an extremely toxic substance among existing pollutants, can cause long‐term unintended effects when improperly disposed. An effective measure to address this problem is to develop suitable heterojunctions. Among various photocatalyst, titanium dioxide (TiO2) appears to be an excellent photocatalyst in the degradation of organic pollutants. RESULTS Synthetization of well‐constructed heterojunction composite of niobium oxide (Nb2O5) and fibrous silica titania (FST) for enhanced photocatalytic degradation of phenol has been investigated. The photocatalytic performance demonstrated that 5 wt% Nb2O5 loaded on FST (5 Nb/FST) gave the maximum phenol degradation rate (1.70 × 10−2 mM min−1) of 10 mg L−1 phenol at pH 5 using 1000 mg L−1 catalyst within 180 min. Meanwhile, under the same conditions, 1 Nb/FST, FST, 10 Nb/FST and Nb2O5 only delivered 1.51 × 10−2, 1.30 × 10−2, 1.01 × 10−2 and 0.07 × 10−2 mM min−1, respectively. Further phenol photocatalytic degradation routes by 5 Nb/FST reveal that the main intermediates detected are hydroquinone, catechol, maleic, fumaric, and malonic acid. CONCLUSION In this work, 5 Nb2O5/FST composite, as an effective‐performance photocatalyst for phenol degradation, was well‐constructed. The advanced activity can primarily be attributed to the regulated Nb2O5 loading with FST and the effect of Nb/FST microsphere heterojunctions, synergistically. Besides, larger crystallite size, high impurity levels and Si‐O‐Nb and Nb–O–Ti bonds, offers excellent phenol degradation. © 2020 Society of Chemical Industry (SCI)

show abstract

“…Even though a wide variety of photocatalysts have been used, such as Ta 3 N 5 [85], Ga 2 O 3 [86], ZnS [87], In 2 O 3 [88], TiO 2 remains the most commonly used of all of them. The photocatalytic activity of TiO 2 was first discovered 90 years ago, but breakthrough was made when Fujishima and Honda used TiO 2 electrode to split water over 40 years ago [89][90][91]. The advantages of TiO 2 is that it is less toxic, low cost, stable [92] and simple to prepare [89].…”

Section: Photocatalystsmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

View full text Add to dashboard Cite

With the concentration of CO 2 in the atmosphere increasing beyond sustainable limits, much research is currently focused on developing solutions to mitigate this problem. Possible strategies involve sequestering the emitted CO 2 for long-term storage deep underground, and conversion of CO 2 into value-added products. Conventional processes for each of these solutions often have high-capital costs associated and kinetic limitations in different process steps. Additionally, CO 2 is thermodynamically a very stable molecule and difficult to activate. Despite such challenges, a number of methods for CO 2 capture and conversion have been investigated including absorption, photocatalysis, electrochemical and thermochemical methods. Conventional technologies employed in these processes often suffer from low selectivity and conversion, and lack energy efficiency. Therefore, suitable process intensification techniques based on equipment, material and process development strategies can play a key role at enabling the deployment of these processes. In this review paper, the cutting-edge intensification technologies being applied in CO 2 capture and conversion are reported and discussed, with the main focus on the chemical conversion methods.

show abstract

Away from TiO2: A critical minireview on the developing of new photocatalysts for degradation of contaminants in water

Cited by 102 publications

References 103 publications

Photocatalytic Degradation of Diclofenac by Hydroxyapatite–TiO2 Composite Material: Identification of Transformation Products and Assessment of Toxicity

Photocatalytic Degradation of Diclofenac by Hydroxyapatite–TiO2 Composite Material: Identification of Transformation Products and Assessment of Toxicity

Visible‐light driven photodegradation of phenol over niobium oxide‐loaded fibrous silica titania composite catalyst

Process intensification technologies for CO2 capture and conversion – a review

Contact Info

Product

Resources

About