The DOI matches its Crossref record; 43 of the 44 references it cites were found in a registry or an index.
Synergy between surface adsorption and photocatalysis during degradation of humic acid on TiO2/activated carbon composites
Abstract
A photocatalyst comprising nano-sized TiO(2) particles on granular activated carbon (GAC) was prepared by a sol-dipping-gel process. The TiO(2)/GAC composite was characterized by scanning electron microscopy (SEM), X-ray diffractiometry (XRD) and nitrogen sorptometry, and its photocatalytic activity was studied through the degradation of humic acid (HA) in a quartz glass reactor. The factors influencing photocatalysis were investigated and the GAC was found to be an ideal substrate for nano-sized TiO(2) immobilization. A 99.5% removal efficiency for HA from solution was achieved at an initial concentration of 15 mg/L in a period of 3h. It was found that degradation of HA on the TiO(2)/GAC composite was facilitated by the synergistic relationship between surface adsorption characteristics and photocatalytic potential. The fitting of experimental results with the Langmuir-Hinshelwood (L-H) model showed that the reaction rate constant and the adsorption constant values were 0.1124 mg/(L min) and 0.3402 L/mg. The latter is 1.7 times of the calculated value by fitting the adsorption equilibrium data into the Langmuir equation.
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“Additionally, • OH may attack aromatic ring sites in compounds resulting in the formation of ring-opened (Fig. 13) products yielding CO 2 /H 2 O and other degradation products; 136,137 breakdown of the benzene ring and its subsequent mineralization leading to CO 2 and H 2 O could be envisaged by the decrease in TOC during the photocatalytic process.138”
From Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources (2016) · cites this paper as [136]
Citations
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Metadata
- Authors
- Xue, G., Liu, H., Chen, Q., Hills, C., Tyrer, M., & Innocent, F.
- Affiliations
- Donghua University (CN)
- University of Greenwich (GB)
- University College London (GB)
- Corresponding author
- Chen, Quanyuan
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2011-02
- Volume
- 186
- Issue
- 1
- Pages
- 765-772
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W1978900623
- Cited by
- 215
- References
- 44
- Citations by year
- 2026: 8 · 2025: 10 · 2024: 13 · 2023: 11 · 2022: 14 · 2021: 19 · 2020: 17 · 2019: 17 · 2018: 15 · 2017: 12 · 2016: 21 · 2015: 12 · 2014: 13 · 2013: 14 · 2012: 12
- FWCI
- 4.94
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Greenwich Academic Literature Archive (University of Greenwich) (submittedVersion)
- Pure (Coventry University) (submittedVersion)
- Funders
- Shanghai Leading Academic Discipline Project (B604)
- Natural Science Foundation of China (50874031)
- Program for New Century Excellent Talents in Universities (NECT-07-0175)
- Shanghai Key Basic Research Project (08JC1400500)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
- Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Keywords
- humic acid degradation, TiO2/activated carbon composite, photocatalysis, surface adsorption, adsorption-photocatalysis synergy, Langmuir-Hinshelwood mechanism, TiO2 immobilization, adsorption constants, water treatment
- MeSH terms
- Adsorption, Carbon, Catalysis, Humic Substances, Hydrogen-Ion Concentration, Microscopy, Electron, Scanning, Photochemistry, Surface Properties, Temperature, Titanium, Metal Nanoparticles
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