Photoelectrocatalytic degradation of glyphosate on titanium dioxide synthesized by sol-gel/spin-coating on boron doped diamond (TiO2/BDD) as a photoanode

Alulema-Pullupaxi, Paulina; Fernández, Lenys; Debut, Alexis; Santacruz, Cristian; Villacis, William; Fierro, Carola; Espinoza-Montero, Patricio J.

doi:10.1016/j.chemosphere.2021.130488

Cited by 52 publications

(26 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy of the photons absorbed by the semiconductor material must be greater or equal to the band-gap energy

, to promote the formation of charge carriers, namely electrons in the conduction band

and holes or positive vacancies in the valence band

. These

pairs are important in both photocatalysis and photoelectrocatalytic technologies ( Tugaoen et al, 2017 ; Kusmierek, 2020 ; Alulema-Pullupaxi et al, 2021a ; Alulema-Pullupaxi et al, 2021b ; Olea et al, 2021 ; Sigcha-Pallo et al, 2022 ). Compared to heterogeneous photocatalysis, PEC also requires an applied bias potential; capable of extracting and transporting electrons through an external circuit, to avoid the recombination of the photogenerated

pairs.…”

Section: Biox Applied In Photoelectrocatalysismentioning

confidence: 99%

“…In addition to the surface reactions that occur in the photoelectrodes, the processes that happen at the interface between the semiconductor and the aqueous medium, specifically between the electrode and the supporting electrolyte (Schottky junction), are also important. This interface is capable of modifying the average electron potential (Fermi energy level), which is closer to the valence band in p-type semiconductors ( Alulema-Pullupaxi et al, 2021b ). This is the case for most semiconductor materials based on BiOXs ( Singh, Sharma and Khanuja, 2018 ).…”

Section: Biox Applied In Photoelectrocatalysismentioning

confidence: 99%

“…The • OH is the second strongest oxidant that exists in nature, and is responsible for oxidizing persistent organic matter, even to its total mineralization, Figure 7 ( Mousset and Dionysiou, 2020 ; Alulema-Pullupaxi, et al, 2021a ; Wang et al, 2021 ; Wei et al, 2021 ). The most widely studied semiconductor material in this field is TiO 2 ( Xu et al, 2019 ; Alulema-Pullupaxi et al, 2021b ; Sigcha-Pallo et al, 2022 ). However, due to its approximate band-gap energy of 3.2 eV, its application in photoelectrochemical processes with sunlight is limited, as this energy value corresponds to the UV range of the electromagnetic spectrum, which results in limited peak power conversion.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

et al. 2022

Self Cite

View full text Add to dashboard Cite

An important target of photoelectrocatalysis (PEC) technology is the development of semiconductor-based photoelectrodes capable of absorbing solar energy (visible light) and promoting oxidation and reduction reactions. Bismuth oxyhalide-based materials BiOX (X = Cl, Br, and I) meet these requirements. Their crystalline structure, optical and electronic properties, and photocatalytic activity under visible light mean that these materials can be coupled to other semiconductors to develop novel heterostructures for photoelectrochemical degradation systems. This review provides a general overview of controlled BiOX powder synthesis methods, and discusses the optical and structural features of BiOX-based materials, focusing on heterojunction photoanodes. In addition, it summarizes the most recent applications in this field, particularly photoelectrochemical performance, experimental conditions and degradation efficiencies reported for some organic pollutants (e.g., pharmaceuticals, organic dyes, phenolic derivatives, etc.). Finally, as this review seeks to serve as a guide for the characteristics and various properties of these interesting semiconductors, it discusses future PEC-related challenges to explore.

show abstract

“…The energy of the photons absorbed by the semiconductor material must be greater or equal to the band-gap energy

, to promote the formation of charge carriers, namely electrons in the conduction band

and holes or positive vacancies in the valence band

. These

pairs.…”

Section: Biox Applied In Photoelectrocatalysismentioning

confidence: 99%

Section: Biox Applied In Photoelectrocatalysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Electrochemical oxidation systems were also tested for glyphosate decomposition. A TiO 2 photoanode was deposited on boron doped diamond (BDD) by sol-gel coupled with spin coating, using titanium oxysulfate as precursor and obtaining aggregates of anatase nanoparticles [132]. The removal of PMG electrocatalysis in the dark reached 91% in 5 h, with significant TOC and COD abatement.…”

Section: Glyphosatementioning

confidence: 99%

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

et al. 2022

View full text Add to dashboard Cite

Endocrine Disrupting Compounds (EDCs) comprise a class of natural or synthetic molecules and groups of substances which are considered as emerging contaminants due to their toxicity and danger for the ecosystems, including human health. Nowadays, the presence of EDCs in water and wastewater has become a global problem, which is challenging the scientific community to address the development and application of effective strategies for their removal from the environment. Particularly, catalytic and photocatalytic degradation processes employing nanostructured materials based on metal oxides, mainly acting through the generation of reactive oxygen species, are widely explored to eradicate EDCs from water. In this review, we report the recent advances described by the major publications in recent years and focused on the degradation processes of several classes of EDCs, such as plastic components and additives, agricultural chemicals, pharmaceuticals, and personal care products, which were realized by using novel metal oxide-based nanomaterials. A variety of doped, hybrid, composite and heterostructured semiconductors were reported, whose performances are influenced by their chemical, structural as well as morphological features. Along with photocatalysis, alternative heterogeneous advanced oxidation processes are in development, and their combination may be a promising way toward industrial scale application.

show abstract

“…Thus, the TiO 2 /BDD heterojunctions have been explored as a catalyst for environmental and energy applications. , In addition, owing to the semimetallic band structure and high electrical conductivity, the electron transfer efficiency in BDD is close to that of electrical conductors, leading to an efficient propagation of carriers through TiO 2 /BDD heterojunctions . The TiO 2 /BDD heterojunctions have been fabricated and shown to exhibit improved photocatalytic, electrocatalytic, and PEC performance. , …”

Section: Introductionmentioning

confidence: 99%

Enhanced Visible-Light-Driven Photoelectrochemical Activity in Nitrogen-Doped TiO₂/Boron-Doped Diamond Heterojunction Electrodes

Huang

Meng

Zhang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Doping and constructing heterojunctions have been demonstrated to be effective for improving the catalytic activity of titanium dioxide (TiO2); however, better performance is still widely expected for practical applications in renewable energy, environmental issues, etc. TiO2/boron-doped diamond (BDD) heterojunction is a promising approach that has been extensively studied in recent years. Herein, nitrogen-doped TiO2 (N-TiO2)/BDD heterojunction is proposed by employing N-TiO2 instead of TiO2. The N-TiO2/BDD heterojunctions were fabricated and systematically characterized to make a detailed comparison between N-TiO2/BDD and TiO2/BDD. The photoelectrochemical (PEC) activity was tested under 1 sun and visible light irradiation, respectively. N-TiO2 showed stronger photoresponse with the extended absorption spectrum that covered both UV and visible ranges. Besides, N-TiO2 also showed higher electrical conductivity due to the higher carrier concentration introduced by N doping. Therefore, larger current density and more efficient charge transport were demonstrated in N-TiO2/BDD heterojunctions, achieving enhanced PEC activity. Interestingly, compared with that of TiO2/BDD, the PEC activity of N-TiO2/BDD was weak at a low applied bias potential (<1.6 VRHE), but it increased dramatically and became much stronger than that of TiO2/BDD at a higher potential (>2.1 VRHE). This was suggested to be caused by the higher carrier concentrations and variation of electronic structures in N-TiO2. The PEC activity could be further promoted if the bias potential was further improved, resulting in excellent PEC performance that could not be realized by TiO2/BDD. Moreover, the doping concentration of N-TiO2 exhibited complicated influences on the PEC performance and needed to be elaborately controlled. Based on the optimized conditions, the largest current density achieved was 0.51 mA/cm2 at 2.8 VRHE and 1 sun irradiation, which was 2.22 times that of TiO2/BDD (0.23 mA/cm2). The carrier transport mechanism was discussed based on the experimental results. The N-TiO2/BDD electrodes showed degradation efficiency 2 times that of tetracycline hydrochloride (TCH) compared with that of undoped TiO2/BDD, which demonstrated promising applications of N-TiO2/BDD in the treatment of organic pollutants.

show abstract

Photoelectrocatalytic degradation of glyphosate on titanium dioxide synthesized by sol-gel/spin-coating on boron doped diamond (TiO2/BDD) as a photoanode

Cited by 52 publications

References 46 publications

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

Enhanced Visible-Light-Driven Photoelectrochemical Activity in Nitrogen-Doped TiO₂/Boron-Doped Diamond Heterojunction Electrodes

Contact Info

Product

Resources

About

Photoelectrocatalytic degradation of glyphosate on titanium dioxide synthesized by sol-gel/spin-coating on boron doped diamond (TiO2/BDD) as a photoanode

Cited by 52 publications

References 46 publications

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

Bismuth Oxyhalide-Based Materials (BiOX: X = Cl, Br, I) and Their Application in Photoelectrocatalytic Degradation of Organic Pollutants in Water: A Review

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

Enhanced Visible-Light-Driven Photoelectrochemical Activity in Nitrogen-Doped TiO2/Boron-Doped Diamond Heterojunction Electrodes

Contact Info

Product

Resources

About

Enhanced Visible-Light-Driven Photoelectrochemical Activity in Nitrogen-Doped TiO₂/Boron-Doped Diamond Heterojunction Electrodes