Enhancing photoactivity for hydrogen generation by electron tunneling via flip-flop hopping over iodinated graphitic carbon nitride | |
Department | OSSO国家重点实验室 |
Li Z(李振)1,2; Tian B(田彬)1,2; Zhang WY(张文妍)1; Zhang XQ(张旭强)1; Wu YQ(吴玉琪)1; Lu GX(吕功煊)1; Lv GX(吕功煊) | |
2017 | |
Source Publication | Applied Catalysis B: Environmental |
ISSN | 0926-3373 |
Volume | 204Pages:33-42 |
Abstract | In this work, the significant electron tunneling over iodine-decorated graphitic carbon nitride (I-g-C3N4) was achieved by I3− and I5− clusters implanted. The flip-flop electron tunneling takes place via strong Rashba spin-orbit coupling in p orbitals of polyiodides. The electron tunneling and hopping bridged the easier transfer route between far-located carbon atoms of g-C3N4 through the polyiodides p orbitals. By taking the advantage of this tunneling, the conductivity of I-g-C3N4/Ag photocatalyst was remarkably increased and the lifetime of photogenerated charges was largely prolonged, evidenced by I–V characteristics and the photoluminescence (PL) spectra. With the help of these properties, the obtained I-g-C3N4/Ag photocatalyst presented high active for hydrogen generation under visible light irradiation and Ag NPs as active site for hydrogen formation. 104.3 μmol H2 was evolved over I-g-C3N4/Ag photocatalyst in 3 h, about three time higher than that of un-iodinated g-C3N4/Ag, and no remarkable decay of activity was observed in 900 min reaction. The highest AQE value of 7.3% was achieved at 520 nm. |
Keyword | Iodine-decorated Graphitic Carbon Nitride Flip-flop Electron Tunneling Enhanced Conductivity Lifetime Of Photogenerated Charges High Photocatalytic Activity For Hydrogen Generation |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1016/j.apcatb.2016.11.020 |
Funding Organization | the NSF of China (grant nos. 21433007;21673262) |
Indexed By | SCI |
If | 9.446 |
Language | 英语 |
Funding Project | 环境催化与氢能源组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/20894 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Lv GX(吕功煊) |
Affiliation | 1.State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China 2.University of Chinese Academy of Science, Beijing 100049, China |
Recommended Citation GB/T 7714 | Li Z,Tian B,Zhang WY,et al. Enhancing photoactivity for hydrogen generation by electron tunneling via flip-flop hopping over iodinated graphitic carbon nitride[J]. Applied Catalysis B: Environmental,2017,204:33-42. |
APA | Li Z.,Tian B.,Zhang WY.,Zhang XQ.,Wu YQ.,...&吕功煊.(2017).Enhancing photoactivity for hydrogen generation by electron tunneling via flip-flop hopping over iodinated graphitic carbon nitride.Applied Catalysis B: Environmental,204,33-42. |
MLA | Li Z,et al."Enhancing photoactivity for hydrogen generation by electron tunneling via flip-flop hopping over iodinated graphitic carbon nitride".Applied Catalysis B: Environmental 204(2017):33-42. |
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2017, 204, 33-42, Ap(4381KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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