Effects of nitrogen/bismuth-doping on the photocatalyst composite of carbon dots/titanium dioxide nanoparticles (CDs/TNP) for enhanced visible light-driven removal of diclofenac

Hui, Khee Chung; Ang, Wei Lun; Yahya, Wan Zaireen Nisa; Sambudi, Nonni Soraya

doi:10.1016/j.chemosphere.2021.133377

Cited by 22 publications

(8 citation statements)

References 54 publications

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“…In this case, the CDs in the composites acted as electron traps, subsequently capturing the photogenerated electrons from the B-TiO 2 and prolonging the existence of charge carriers by slowing down the recombination of photogenerated electron–hole pairs. 34 This finding agrees with the average lifetime results measured by time-resolved PL spectroscopy ( Figure S3 and Table S1 ).…”

Section: Resultssupporting

confidence: 90%

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

et al. 2023

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The development of a photoelectrochemical (PEC) sensor for the sensitive and rapid detection of glucose is highly desirable. In PEC enzyme sensors, inhibition of the charge recombination of electrode materials is an efficient technique, and detection in visible light can prevent enzyme inactivation due to ultraviolet irradiation. In this study, a visible light-driven PEC enzyme biosensor was proposed, using CDs/branched TiO 2 (B-TiO 2 ) as the photoactive material and glucose oxidase (GOx) as the identification element. The CDs/B-TiO 2 composites were produced via a facile hydrothermal method. Carbon dots (CDs) can not only act as photosensitizers but also inhibit photogenerated electron and hole recombination of B-TiO 2 . Under visible light, electrons in the carbon dots flowed to B-TiO 2 and further to the counter electrode through the external circuit. In the presence of glucose and dissolved oxygen, H 2 O 2 generated through the catalysis of GOx could consume electrons in B-TiO 2 , causing a decrease in photocurrent intensity. Ascorbic acid was added to ensure the stability of the CDs during the test. Based on the variation of the photocurrent response, the CDs/B-TiO 2 /GOx biosensor presented a good sensing performance of glucose in visible light, its detection range was from 0 to 9.00 mM, and the detection limit was 0.0430 mM.

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Section: Resultssupporting

confidence: 90%

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

et al. 2023

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“…As a secondary transformation, a lower proportion of DCF seems to be converted into the 2,6-dichloro-N-(2-methylphenyl)aniline (B.1 m/z = 250) by decarboxylation and subsequent C-N excision to give the 4-amino-3,5-dichlorophenol (B.2. m/z = 177) at 4 h. The formation of the fragment B.2 can also be ascribed to the C-N cleavage of the 2-[2-(2,6-dichloro-4-hydroxyanilino)phenyl]acetic acid (C.1 m/z = 311) at 2 h. Additionally, the presence of a low-intensity fragment at m/z = 215 can be due to the possible transformation of DCF into 1-chloro-8-methyl-9H-carbazole (D.1 m/z = 215) 60 . After 24 h, the main degradation compounds found in the solution correspond to the A.2 (higher proportion) and A.3 products (less proportion).…”

Section: Resultsmentioning

confidence: 99%

SU-101 for the removal of pharmaceutical active compounds by the combination of adsorption/photocatalytic processes

Chacón-García,

Rojas,

Grape

et al. 2024

Sci Rep

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Pharmaceutical active compounds (PhACs) are some of the most recalcitrant water pollutants causing undesired environmental and human effects. In absence of adapted decontamination technologies, there is an urgent need to develop efficient and sustainable alternatives for water remediation. Metal–organic frameworks (MOFs) have recently emerged as promising candidates for adsorbing contaminants as well as providing photoactive sites, as they possess exceptional porosity and chemical versatility. To date, the reported studies using MOFs in water remediation have been mainly focused on the removal of a single type of PhACs and rarely on the combined elimination of PhACs mixtures. Herein, the eco-friendly bismuth-based MOF, SU-101, has been originally proposed as an efficient adsorbent-photocatalyst for the elimination of a mixture of three challenging persistent PhACs, frequently detected in wastewater and surface water in ng L−1 to mg·L−1 concentrations: the antibiotic sulfamethazine (SMT), the anti-inflammatory diclofenac (DCF), and the antihypertensive atenolol (At). Adsorption experiments of the mixture revealed that SU-101 exhibited a great adsorption capacity towards At, resulting in an almost complete removal (94.1 ± 0.8% for combined adsorption) in only 5 h. Also, SU-101 demonstrated a remarkable photocatalytic activity under visible light to simultaneously degrade DCF and SMT (99.6 ± 0.4% and 89.2 ± 1.4%, respectively). In addition, MOF-contaminant interactions, the photocatalytic mechanism and degradation pathways were investigated, also assessing the toxicity of the resulting degradation products. Even further, recycling and regeneration studies were performed, demonstrating its efficient reuse for 4 consecutive cycles without further treatment, and its subsequent successful regeneration by simply washing the material with a NaCl solution.

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“…In view of this, the following photocatalytic methods have been used in the removal of diclofenac from water. 665–748…”

Section: Removal Of Pharmaceutical Components Using Different Photoca...mentioning

confidence: 99%

Recent advances in removal of pharmaceutical pollutants in wastewater using metal oxides and carbonaceous materials as photocatalysts: a review

Srivastava

2024

RSC Appl. Interfaces

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Effects of nitrogen/bismuth-doping on the photocatalyst composite of carbon dots/titanium dioxide nanoparticles (CDs/TNP) for enhanced visible light-driven removal of diclofenac

Cited by 22 publications

References 54 publications

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

SU-101 for the removal of pharmaceutical active compounds by the combination of adsorption/photocatalytic processes

Recent advances in removal of pharmaceutical pollutants in wastewater using metal oxides and carbonaceous materials as photocatalysts: a review

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Effects of nitrogen/bismuth-doping on the photocatalyst composite of carbon dots/titanium dioxide nanoparticles (CDs/TNP) for enhanced visible light-driven removal of diclofenac

Cited by 22 publications

References 54 publications

Carbon Dot-Modified Branched TiO2 Photoelectrochemical Glucose Sensors with Visible Light Response

Carbon Dot-Modified Branched TiO2 Photoelectrochemical Glucose Sensors with Visible Light Response

SU-101 for the removal of pharmaceutical active compounds by the combination of adsorption/photocatalytic processes

Recent advances in removal of pharmaceutical pollutants in wastewater using metal oxides and carbonaceous materials as photocatalysts: a review

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Product

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Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response