Photocatalytic Degradation of 1,10-Dichlorodecane in Aqueous Suspensions of TiO<sub>2</sub>: A Reaction of Adsorbed Chlorinated Alkane with Surface Hydroxyl Radicals
Why this work is in the frame
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Bibliographic record
Abstract
1,10-Dichlorodecane (D 2 C 10 ) is shown to be effectively photodegraded in aqueous suspensions of TiO 2 using a photoreactor equipped with 300 nm lamps. Solutions exposed to UV light intensities of 3.6 × 10 - 5 Ein L - 1 min - 1, established by ferrioxalate actinometry, showed negligible direct photolysis in the absence of TiO 2 . The degradation rate was optimal with 150 mg/L of TiO 2 and a D 2 C 10 concentration (240 μg/L) approaching its solubility limit. Kinetics of photodegradation followed a Langmuir−Hinshelwood model suggesting that the reaction occurred on the surface of the photocatalyst. The presence of h + vb and OH • radical scavengers, including methanol and iodide, inhibited the degradation supporting a photooxidation reaction. Electron scavengers (Ag +, Cu 2+, and Fe 3+ ) had small effects on the degradation rate. The lack of transformation of D 2 C 10 in acetonitrile as solvent indicated that the major oxidants were OH • radicals. The presence of tetranitromethane, effectively eliminating the formation of free OH • radicals, did not affect the degradation rates significantly. This result, combined with observed increases in photolysis rates with the degree of adsorption of D 2 C 10 onto the surface of the photocatalyst, confirmed that the reaction involved adsorbed 1,10-dichlorodecane and surface bound OH • radicals.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.003 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it