Z-Scheme Photocatalytic System Utilizing Separate Reaction Centers by Directional Movement of Electrons
Bibliographic record
Abstract
Increasing of electron−hole separation is crucial to the improvement in the activity of photocatalyst. Photosynthesis involving the Z-scheme mechanism provides a unique process to utilize the solar energy by various biosystems and natural lives through effective electron−hole pair separation. This is an inspiring approach to the solar energy conversion for, e.g., photocatalysis of H 2 evolution. Although some progress has been made in this technological area, a nontoxic photocatalytic system with a wide pH range by directional electron transfer with simple coupling of components has still not been achieved. In this study, a photocatalytic system mimicking the Z-scheme without electron mediators was developed, in which PS I and PS II were separated in space but operated simultaneously, resulting in two photochemical reactions that operate in parallel. This approach of utilizing two light beams including UV and visible light provides a new route for efficient conversion of solar energy. This nontoxic system has demonstrated higher stability in a wide pH range from 1 to 13, higher effectiveness in separating electron−hole pairs, and greater photoactivity than a single component system. Such improvement is attributed to the directional electron transfer actuated by the photoexcitation of TiO 2 and heteropoly blue, respectively.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".