Application of natural minerals in photocatalytic degradation of organic pollutants: A review

Tang, Xiangwei; Tang, Rongdi; Xiong, Sheng; Zheng, Jun; Li, Ling; Zhou, Zhanpeng; Gong, Daoxin; Deng, Yaocheng; Su, Long; Liao, Chanjuan

doi:10.1016/j.scitotenv.2021.152434

Cited by 88 publications

(28 citation statements)

References 160 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, various modification methods for the plasmonic-based heterojunction photocatalyst have been proposed by loading metal NPs as co-catalysts into the heterojunction photocatalysts [ 37 , 38 ]. Thus, many reviews have encouraged the use of simple heterojunction photocatalysts for organic pollutants degradation [ 39 – 41 ]. However, the rapid recombination of the photogenerated e − – h + pairs and the limited light absorption currently limit the practical application of this heterojunction photocatalyst technique [ 16 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

et al. 2023

View full text Add to dashboard Cite

Organic pollutants in wastewater are the biggest problem facing the world today due to population growth, rapid increase in industrialization, urbanization, and technological advancement. There have been numerous attempts to use conventional wastewater treatment techniques to address the issue of worldwide water contamination. However, conventional wastewater treatment has a number of shortcomings, including high operating costs, low efficiency, difficult preparation, fast recombination of charge carriers, generation of secondary waste, and limited light absorption. Therefore, plasmonic-based heterojunction photocatalysts have attracted much attention as a promising method to reduce organic pollutant problems in water due to their excellent efficiency, low operating cost, ease of fabrication, and environmental friendliness. In addition, plasmonic-based heterojunction photocatalysts contain a local surface plasmon resonance that enhances the performance of photocatalysts by improving light absorption and separation of photoexcited charge carriers. This review summarizes the major plasmonic effects in photocatalysts, including hot electron, local field effect, and photothermal effect, and explains the plasmonic-based heterojunction photocatalysts with five junction systems for the degradation of pollutants. Recent work on the development of plasmonic-based heterojunction photocatalysts for the degradation of various organic pollutants in wastewater is also discussed. Lastly, the conclusions and challenges are briefly described and the direction of future development of heterojunction photocatalysts with plasmonic materials is explored. This review could serve as a guide for the understanding, investigation, and construction of plasmonic-based heterojunction photocatalysts for various organic pollutants degradation. Graphical abstract Herein, the plasmonic effects in photocatalysts, such as hot electrons, local field effect, and photothermal effect, as well as the plasmonic-based heterojunction photocatalysts with five junction systems for the degradation of pollutants are explained. Recent work on plasmonic-based heterojunction photocatalysts for the degradation of various organic pollutants in wastewater such as dyes, pesticides, phenols, and antibiotics is discussed. Challenges and future developments are also described.

show abstract

Section: Introductionmentioning

confidence: 99%

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Recently, considerable attention has turned to the role of pesticides and herbicides as organic environmental pollutants . The compounds they contain are considered dangerous due to their accumulative properties, high solubility, and chemical stability . Moreover, they are categorized as hazardous due to their potential toxicity to human health and natural ecosystems …”

Section: Introductionmentioning

confidence: 99%

“…Research is ongoing to develop new formulations and application techniques that reduce dicamba’s potential for off-target movement . For several years, great effort has been devoted to removing or decreasing the quantity of organic contaminants, such as herbicides, to acceptable levels in water and soil . Advanced oxidation processes (AOPs) are highly efficient methods that are capable of oxidizing organic pollutants in the aqueous phase .…”

Section: Introductionmentioning

confidence: 99%

Dicamba Degradation Using a Low-Cost Chlorine/Ferrous-Based AOP: ANN-PSO Model Development, Intermediate Identification, and Toxicity Assessment Using Microalgae

Bouizzar,

Berkani,

Kebaili

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

In this study, the degradation of Dicamba methyl ester (DME) was investigated using a low-cost chlorine/ferrous process. The degradation yield was determined by examining the influence of several factors, such as NaClO concentration, dicamba concentration, FeSO4 catalyst mass, and initial solution pH, over a 15 min period. To determine the optimal conditions for DME degradation, an artificial neural network (ANN) model with 4-5-1 architecture was developed. The particle swarm optimization (PSO) algorithm was then utilized in conjunction with the ANN model to identify the optimal factor levels predicted yield of 88%. The following optimal conditions were identified: [NaClO] = 422.3 μM, [Dicamba] = 4.4 mg/L, [FeSO4] = 9.5 mg/L, and a pH of 2.56. GC/MS analysis was conducted to identify the byproducts that were generated during DME degradation. Benzene, 1,2,4-trichloro-3-methoxy DME-BP (m/z 210) was the only identified byproduct that contained chlorine in its structure. A proposed reaction pathway for the DME degradation was suggested based on the obtained mass spectra. In the final stage of the study, total organic carbon (TOC) removal was analyzed using a Fenton-like process under optimized conditions for a duration of 195 min. To confirm the effectiveness of DME and its byproduct degradation, toxicity assessments were performed using the Chlorella vulgaris microalgae as a model organism. The results indicated a low toxicity of 20% when the DME mineralization reached 62.52%. These findings provide strong evidence that support the effectiveness of the proposed low-cost system for DME removal.

show abstract

“…The photogenerated electrons, holes, together with the subsequently produced 1 O 2 , •O 2 − , •OH, and H 2 O 2 can induce complex redox reactions. which would further impact the environmental fate of various metal ions and organic matters [ 18 , 19 , 20 , 21 ]. Studies have indicated that some iron oxides can act as natural photocatalysts to catalyze the oxidation of organic matters [ 22 , 23 , 24 ], and ferrihydrite could also act as a semiconductor material for Mn(II) oxidation [ 25 , 26 ] and organic matter degradation [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Light Promotes the Immobilization of U(VI) by Ferrihydrite

Wang

Ding

et al. 2022

Molecules

View full text Add to dashboard Cite

The environmental behaviors of uranium closely depend on its interaction with natural minerals. Ferrihydrite widely distributed in nature is considered as one main natural media that is able to change the geochemical behaviors of various elements. However, the semiconductor properties of ferrihydrite and its impacts on the environmental fate of elements are sometimes ignored. The present study systematically clarified the photocatalysis of U(VI) on ferrihydrite under anaerobic and aerobic conditions, respectively. Ferrihydrite showed excellent photoelectric response. Under anaerobic conditions, U(VI) was converted to U(IV) by light-irradiated ferrihydrite, in the form of UO2+x (x < 0.25), where •O2− was the dominant reactive reductive species. At pH 5.0, ~50% of U(VI) was removed after light irradiation for 2 h, while 100% U(VI) was eliminated at pH 6.0. The presence of methanol accelerated the reduction of U(VI). Under aerobic conditions, the light illumination on ferrihydrite also led to an obvious but slower removal of U(VI). The removal of U(VI) increased from ~25% to 70% as the pH increased from 5.0 to 6.0. The generation of H2O2 under aerobic conditions led to the formation of UO4•xH2O precipitates on ferrihydrite. Therefore, it is proved that light irradiation on ferrihydrite significantly changed the species of U(VI) and promoted the removal of uranium both under anaerobic and aerobic conditions.

show abstract

Application of natural minerals in photocatalytic degradation of organic pollutants: A review

Cited by 88 publications

References 160 publications

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

Dicamba Degradation Using a Low-Cost Chlorine/Ferrous-Based AOP: ANN-PSO Model Development, Intermediate Identification, and Toxicity Assessment Using Microalgae

Light Promotes the Immobilization of U(VI) by Ferrihydrite

Contact Info

Product

Resources

About