Visible light induced degradation of perfluorooctanoic acid using iodine deficient bismuth oxyiodide photocatalyst

Article Chemistry, Physical

Effect of calcination induced phase transition on the photocatalytic hydrogen production activity of BiOI and Bi5O7I based photocatalysts

Chi-Jung Chang et al.

Summary: Flower-like BiOI and Bi5O7I photocatalysts were synthesized by a microwave-assisted solvothermal process, and the effects of calcination temperature on their properties and activity were investigated.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

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Review Chemistry, Multidisciplinary

Designing and modification of bismuth oxyhalides BiOX (X = Cl, Br and I) photocatalysts for improved photocatalytic performance

Irshad Ahmad et al.

Summary: Photocatalysis is a promising technology for solving global environmental and energy challenges, with a focus on the design and modification of BiOX materials to improve their photocatalytic response and efficiency. Despite the unique properties of BiOX materials, such as their layered structure and tunable optical properties, limitations like rapid charge carrier recombination and limited light absorption hinder their industrial applications and efficiency.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2022)

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Review Environmental Sciences

Emerging technologies for PFOS/PFOA degradation and removal: A review

Shui Cheung Edgar Leung et al.

Summary: This review article focuses on the degradation methods for perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA). Various technologies, such as bioremediation, electrocoagulation, foam fractionation, sonolysis, photocatalysis, mechanochemical, and electrochemical degradation, have been developed and studied in recent years to address the PFAS crisis. However, challenges remain in terms of large-scale operation complexity and the release of toxic byproducts.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

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Article Engineering, Environmental

High-performance photocatalytic decomposition of PFOA by BiOX/TiO2 heterojunctions: Self-induced inner electric fields and band alignment

Xiaoqing Liu et al.

Summary: BiOX/TiO2 photocatalysts prepared by hydrothermal method showed enhanced efficiency in photocatalytic decomposition of PFOA compared to sole BiOX or TiO2. The formation of p-n heterojunctions and the driving force of internal electric fields enabled the migration of photo-induced holes from TiO2 to BiOX, facilitating PFOA decomposition.

JOURNAL OF HAZARDOUS MATERIALS (2022)

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Article Environmental Sciences

Preparation of hollow-fiber nanofiltration membranes of high performance for effective removal of PFOA and high resistance to BSA fouling

Wenjing Tang et al.

Summary: This study focuses on the development of NF membrane material for efficient removal of PFOA combined pollution, using SiO2/CMWCNT/PMIA hollow fiber NF membrane which shows improved fouling resistance and separation performance.

JOURNAL OF ENVIRONMENTAL SCIENCES (2022)

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Article Environmental Sciences

Occurrence, source apportionment, and pollution assessment of per- and polyfluoroalkyl substances in a river across rural and urban areas

Leilei Cai et al.

Summary: This study quantified the levels of PFASs in water and sediments from the Chaobai River in Beijing, and identified consumer products and metal plating/textile as the main sources of pollution. The study proposes three criteria for dividing PFASs concentrations into pollution levels and investigates the pollution patterns of PFASs in China and the world's surface waters.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

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Review Environmental Sciences

Design of nanomaterials for the removal of per- and poly-fluoroalkyl substances (PFAS) in water: Strategies, mechanisms, challenges, and opportunities

Sheng Yin et al.

Summary: Due to their widespread distribution and negative impacts on human health, removing per- and polyfluoroalkyl substances (PFAS) from the environment has become a major research focus. Recent studies have shown that nanomaterials offer promising solutions for PFAS removal through various adsorption and degradation methods. This review provides an overview of the performance, mechanisms, and conditions of different types of nanomaterials in water treatment applications, emphasizing the significant potential of nanotechnology in PFAS remediation.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

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Article Environmental Sciences

Pollutant source or sink? Adsorption and mobilization of PFOS and PFOA from sediments in a large shallow lake with extended reed belt

D. Reif et al.

Summary: In this study, the occurrence of PFOS and PFOA in sediments, pore water, and bulk water from Lake Neusiedl in Austria was assessed, and the mechanisms regulating the adsorption and remobilization of these substances were investigated. The results showed that the adsorption capacity was mainly influenced by organic matter content, oxide composition, and pre-loading of the sediments. Sediment transport and adsorption to sediments in the reed belt were found to partly buffer the increase of PFAS concentrations in the lake. However, there was a real risk for mobilization of PFOS and PFOA from reed belt sediments under current conditions.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2022)

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Review Engineering, Chemical

Challenges Facing Sustainable Visible Light Induced Degradation of Poly- and Perfluoroalkyls (PFA) in Water: A Critical Review

Jhimli Paul Guin et al.

Summary: Poly- and perfluoroalkyls (PFAs) are serious threats to the environment due to their persistence and long-range spreading. Visible-light induced degradation using photocatalysts shows promising results for remediation of PFAs, but there are challenges in upscaling it for practical applications. This Review critically analyzes recent advancements in photocatalytic remediation of aqueous PFAs under visible light irradiation and suggests future directions for practical applications.

ACS ENGINEERING AU (2022)

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Article Chemistry, Physical

Bi4O5I2-Bi5O7I/Ni foam constructed in-situ accelerating interfacial carrier transfer for efficient photocatalysis

Shaomang Wang et al.

Summary: The Bi4O5I2-Bi5O7I/Ni foam prepared by calcination demonstrated excellent photocatalytic performance in degrading RhB, with removal rates of total organic carbon and total organic nitrogen reaching 47% and 38% respectively.

APPLIED SURFACE SCIENCE (2021)

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Article Chemistry, Physical

Combination of iodine-deficient BiOI phases in the presence of CNT to enhance photocatalytic activity towards phenol decomposition under visible light

Nikita Sharma et al.

Summary: BiOI/CNT composites were prepared by hydrothermal method, and the impact of CNT and hydrothermal treatment conditions on the properties was studied. Samples prepared at higher temperature with longer duration showed superior photodegradation performance for phenol and RhB under visible light irradiation.

APPLIED SURFACE SCIENCE (2021)

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Article Engineering, Environmental

Insightful understanding of charge carrier transfer in 2D/2D heterojunction photocatalyst: Ni-Co layered double hydroxides deposited on ornamental g-C3N4 ultrathin nanosheet with boosted molecular oxygen activation

Mingming Zhang et al.

Summary: A novel Ni-Co LDH infused C, O co-doped g-C3N4 2D ultrathin nanosheet was prepared with impressive photocatalytic performance, enhanced activation efficiency, and improved surface charge transfer efficiency compared to g-C3N4. The feasible photocatalytic mechanism for molecular oxygen activation was explained based on experimental analysis.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Engineering, Environmental

Decomposition of highly persistent per fl uorooctanoic acid by hollow Bi/BiOI1-xFx: Synergistic e ff ects of surface plasmon resonance and modified band structures

Jingzhen Wang et al.

Summary: In this study, hollow microsphere structures of Bi doped BiOI1-xFx solid solutions were prepared, which effectively reduced the band gap and increased the surface area and active sites for reaction. The Bi/BiOI0.8F0.2 composite exhibited the best photocatalytic performance for decomposing PFOA, with a degradation rate constant tenfold higher compared to pure BiOI and BiOF.

JOURNAL OF HAZARDOUS MATERIALS (2021)

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Article Chemistry, Physical

Boosting the H2 Production Efficiency via Photocatalytic Organic Reforming: The Role of Additional Hole Scavenging System

Yamen AlSalka et al.

Summary: The study investigated the photocatalytic hydrogen evolution from oxalic acid and found that the photo-Kolbe reaction mechanism contributed to the generation of a small amount of formic acid, which disappeared after oxalic acid consumption. Adding KI as an additional hole scavenger had a considerable impact on the reaction mechanism, promoting H-2 evolution to reach the theoretically predictable amount without affecting the oxalic acid degradation rate.

CATALYSTS (2021)

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Article Chemistry, Physical