東北大学 · エネルギー
小 Zhang教授の研究室は、半導体ナノ材料を用いた新規光触媒・発光材料の開発を柱としています。特に、g-C₃N₄を基体としたヘテロ構造やホモ構造のナノアーキテクチャ設計により、光励起キャリアの分離効率を向上させ、太陽エネルギー変換（水素生成、CO₂還元）や発光デバイスへの応用を追求しています。また、ペロキシスクライドナノクリスタルの安定化技術や、シリカコーティングによる耐環境性向上の研究も進めています。
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This study presents a combined parameter and state estimation algorithm for a bilinear system described by its observer canonical state‐space model based on the hierarchical identification principle. The Kalman filter is known as the best state filter for linear systems, but not applicable for bilinear systems. Thus, a bilinear state observer (BSO) is designed to give the state estimates using the extremum principle. Then a BSO‐based recursive least squares (BSO‐RLS) algorithm is developed. For
Construction of Z-scheme heterojunctions has been considered one superb method in promoting solar-assisted charge carrier separation of carbon-based materials to achieve efficient utilization of solar energy in hydrogen production and CO<sub>2</sub> reduction. One interesting concept in nanofabrication that has become trend recent years is nanoarchitectonics. A heterostructure photocatalyst constructed based on the idea of nanoarchitectonics using the combination of g-C<sub>3</sub>N<sub>4</sub>,
g-C<sub>3</sub>N<sub>4</sub> has been used as a photocatalyst to overcome the issues of environmental crises and energy shortages. Here, red g-C<sub>3</sub>N<sub>4</sub> nanosheets (E<sub>g</sub>: ∼ 1.89 eV) were used as seeds for the edge-epitaxial growth of yellow g-C<sub>3</sub>N<sub>4</sub> (E<sub>g</sub>: ∼ 2.59 eV) to form type II heterostructures. The heterostructures revealed superior photocatalytic activity for enhanced H<sub>2</sub> (3996 μmol g<sup>-1</sup> h<sup>-1</sup>), CO (3.8 μm
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