结构化学最新文献_第6页

Alkyl-linked TiO2@COF heterostructure facilitating photocatalytic CO2 reduction by targeted electron transport

IF 5.9 4区化学

结构化学 Pub Date : 2024-12-01 DOI: 10.1016/j.cjsc.2024.100453

Jiangqi Ning, Junhan Huang, Yuhang Liu, Yanlei Chen, Qing Niu, Qingqing Lin, Yajun He, Zheyuan Liu, Yan Yu, Liuyi Li

{"title":"Alkyl-linked TiO2@COF heterostructure facilitating photocatalytic CO2 reduction by targeted electron transport","authors":"Jiangqi Ning, Junhan Huang, Yuhang Liu, Yanlei Chen, Qing Niu, Qingqing Lin, Yajun He, Zheyuan Liu, Yan Yu, Liuyi Li","doi":"10.1016/j.cjsc.2024.100453","DOIUrl":"10.1016/j.cjsc.2024.100453","url":null,"abstract":"<div><div>Targeted electron transfer to catalytically active site for CO2 reduction is promising for enhancing the efficiency of artificial photosynthesis. Here, we demonstrate a design of an alkyl-linked heterostructure composing of TiO2 and a Cu-porphyrin-based covalent organic framework (TiO2@CuPorTT-COF) for the photoreduction of CO2 with H2O. Through specific coordination effect, the alkyl chain bridges TiO2 and Cu moiety in COF. Upon light illumination, the photoinduced electrons in TiO2 can be directionally transported across the interface along the alkyl chain to the Cu active sites to reduce adsorbed CO2, while the left holes are consumed by the H2O oxidation, enhancing the spatial separation and utilization of electron-hole pairs. Accordingly, the TiO2@CuPorTT-COF enables remarkably superior catalytic activities over the counterpart without the alkyl bridge for electron transfer with 5 times of CO production rate. An apparent quantum efficiency of 0.455% at 380 nm is achieved. Moreover, a dynamic evolution of Cu active site for CO2 reduction is revealed, which can be promoted by the targeting electron transport approach. This work provides a targeted electron transport strategy for constructing photocatalysts.</div></div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 12","pages":"Article 100453"},"PeriodicalIF":5.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial channel design on the charge migration for photoelectrochemical applications 关于 PEC 应用中电荷迁移的界面通道设计

IF 5.9 4区化学

结构化学 Pub Date : 2024-12-01 DOI: 10.1016/j.cjsc.2024.100398

Shengdong Sun, Cheng Wang, Shikuo Li

引用次数: 0

Design and fabrication of ternary Au/Co3O4/ZnCdS spherical composite photocatalyst for facilitating efficient photocatalytic hydrogen production

IF 5.9 4区化学

结构化学 Pub Date : 2024-12-01 DOI: 10.1016/j.cjsc.2024.100472

Linping Li , Junhui Su , Yanping Qiu , Yangqin Gao , Ning Li , Lei Ge

{"title":"Design and fabrication of ternary Au/Co3O4/ZnCdS spherical composite photocatalyst for facilitating efficient photocatalytic hydrogen production","authors":"Linping Li , Junhui Su , Yanping Qiu , Yangqin Gao , Ning Li , Lei Ge","doi":"10.1016/j.cjsc.2024.100472","DOIUrl":"10.1016/j.cjsc.2024.100472","url":null,"abstract":"<div><div>Promoting efficient carrier separation and transfer can largely enhance photocatalytic performance and inhibit photo-corrosion. In this work, ZnCdS (ZCS) microspheres were obtained by a self-assembly strategy, and the Au/Co3O4/ZCS composites were synthesized by a modified photo-deposition method (loading Co3O4 and Au onto the surface of ZnCdS). The synergistic effect between the S-scheme heterojunction (Co3O4/ZCS) and Schottky junction (Au/ZCS) can effectively promote the generation and separation of photoelectrons and holes, thus enhancing the photocatalytic activity. Under visible light, the efficient photocatalysts showed hydrogen production activities up to 2525 μmol g−1 h−1, which is 2.24 times higher than that of Co3O4/ZCS and 6.92 times higher than that of pure ZnCdS. DFT calculations indicate that the built-in electric field between Co3O4/ZCS provides the driving force for efficient electron-hole separation, and the Au nanoparticles (NPs) act as electron collectors at the interface of ZnCdS to capture the electrons, which effectively prolongs the lifetime of photoelectrons and further enhances the photocatalytic hydrogen production activity.</div></div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 12","pages":"Article 100472"},"PeriodicalIF":5.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydroxyl-enriched hydrous tin dioxide-coated BiVO4 with boosted photocatalytic H2O2 production

IF 5.9 4区化学

结构化学 Pub Date : 2024-12-01 DOI: 10.1016/j.cjsc.2024.100457

Sikai Wu , Xuefei Wang , Huogen Yu

{"title":"Hydroxyl-enriched hydrous tin dioxide-coated BiVO4 with boosted photocatalytic H2O2 production","authors":"Sikai Wu , Xuefei Wang , Huogen Yu","doi":"10.1016/j.cjsc.2024.100457","DOIUrl":"10.1016/j.cjsc.2024.100457","url":null,"abstract":"<div><div>The rapid decomposition of H2O2 on the surface of inorganic photocatalyst (BiVO4) and insufficient proton supply from water leads to a low photosynthetic yield of H2O2. Herein, hydrous tin dioxide (HSnO) with massive hydroxyl groups is coated on the BiVO4 surface to greatly improve the photocatalytic H2O2 activity via simultaneous realization of providing sufficient protons and inhibiting H2O2 decomposition. After coating HSnO, Au nanoparticles as the O2-reduction active sites are selectively deposited on the (010) facet of BiVO4 to synthesize Au/BiVO4@HSnO photocatalyst. The resulting Au/BiVO4@HSnO photocatalyst exhibits excellent H2O2-production performance, in which the photogenerated H2O2 concentration (210.7 μmol L−1) is about 4.8 times higher than that of Au/BiVO4 after 2 h light irradiation in pure water. The outstanding photocatalytic performance can be attributed to simultaneous enhancement of H2O2 generation and the suppression of H2O2 decomposition by HSnO coating. Specifically, the HSnO coating with massive hydroxyl groups provides enough protons to promote the catalytic transformation of O2 into H2O2 on Au nanoparticles. More importantly, this coating not only allows water molecules to effectively permeate onto BiVO4 surface for rapid oxidation reaction, but also greatly inhibits the reverse reaction of H2O2 decomposition via decreasing its affinity with BiVO4 surface. This research offers new insights for boosting photocatalytic H2O2 production through surface coating strategy.</div></div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 12","pages":"Article 100457"},"PeriodicalIF":5.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sulfur-defective ZnIn2S4 nanosheets decorated by TiO2 nanosheets with exposed {001} facets to accelerate charge transfer for efficient photocatalytic hydrogen evolution

IF 5.9 4区化学

结构化学 Pub Date : 2024-12-01 DOI: 10.1016/j.cjsc.2024.100474

Xing Xiao , Yunling Jia , Wanyu Hong , Yuqing He , Yanjun Wang , Lizhi Zhao , Huiqin An , Zhen Yin

{"title":"Sulfur-defective ZnIn2S4 nanosheets decorated by TiO2 nanosheets with exposed {001} facets to accelerate charge transfer for efficient photocatalytic hydrogen evolution","authors":"Xing Xiao , Yunling Jia , Wanyu Hong , Yuqing He , Yanjun Wang , Lizhi Zhao , Huiqin An , Zhen Yin","doi":"10.1016/j.cjsc.2024.100474","DOIUrl":"10.1016/j.cjsc.2024.100474","url":null,"abstract":"<div><div>Efficient separation and transfer of photogenerated carriers is one of the important factors for improving photocatalytic H2 production from water splitting. In this work, ZnIn2S4 nanosheets (NSs) with sulfur defect (Vs-ZIS) and TiO2 NSs with exposed {001} facets (001-TiO2 NSs) are fabricated firstly, then the novel 001-TiO2/Vs-ZIS heterojunction is constructed by employing NH4HCO3 as a binder, in which NH4+ attracts the 001-TiO2 and Vs-ZIS NSs to contact with each other and forms a compact 2D/2D heterostructure. Benefit from the suitable band structure of Vs-ZIS and 001-TiO2, the photoinduced electrons on 001-TiO2 recombine with the photoinduced holes on Vs-ZIS following Z-scheme mechanism, leading to the remarkable separation of photogenerated carriers. In addition, the synergistic effects of unique 2D/2D structure, highly active {001} facets and sulfur defect also contribute to the efficient separation of photogenerated carriers and enhanced photocatalytic activity in 001-TiO2/Vs-ZIS system. The obtained 2D/2D 001-TiO2/Vs-ZIS photocatalyst exhibits an outstanding H2 evolution rate of 17113 μmol g−1 h−1, which is approximately 1426- and 3-fold compared to those of 001-TiO2 NSs and Vs-ZIS NSs, respectively.</div></div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 12","pages":"Article 100474"},"PeriodicalIF":5.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

State-of-the-art evolution of g-C3N4-based photocatalytic applications: A critical review

IF 5.9 4区化学

结构化学 Pub Date : 2024-12-01 DOI: 10.1016/j.cjsc.2024.100469

Yanghanbin Zhang , Dongxiao Wen , Wei Sun , Jiahe Peng , Dezhong Yu , Xin Li , Yang Qu , Jizhou Jiang

{"title":"State-of-the-art evolution of g-C3N4-based photocatalytic applications: A critical review","authors":"Yanghanbin Zhang , Dongxiao Wen , Wei Sun , Jiahe Peng , Dezhong Yu , Xin Li , Yang Qu , Jizhou Jiang","doi":"10.1016/j.cjsc.2024.100469","DOIUrl":"10.1016/j.cjsc.2024.100469","url":null,"abstract":"<div><div>g-C3N4 is a promising non-metallic photocatalyst recognized for its unique structural and physicochemical properties. Recent reviews have addressed g-C3N4-based photocatalysis; however, the rapid progress in big data and artificial intelligence has significantly accelerated the design, synthesis, and optimization of these materials. Machine learning, theoretical simulations, and advanced in-situ characterization techniques have deepened our understanding of their photocatalytic mechanisms. This review critically evaluates advancements in g-C3N4-based photocatalysts over the last two to three years, focusing on strategies to improve photogenerated charge separation, expand light absorption, and enhance stability and catalytic efficiency. It discusses cutting-edge in-situ characterization methods alongside machine learning approaches for predicting and optimizing applications in photocatalytic H2 evolution, CO2 reduction, pollutant degradation, H2O2 production, and nitrogen fixation. Finally, it proposes prospective strategies for further enhancing the performance of g-C3N4-based photocatalysts, aiming to guide the design of high-performance two-dimensional carbon-based photocatalysts.</div></div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 12","pages":"Article 100469"},"PeriodicalIF":5.9,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phase transition arising from order-disorder motion in stable layered two-dimensional perovskite 稳定的层状二维过氧化物中的有序-无序运动引起的相变

IF 5.9 4区化学

结构化学 Pub Date : 2024-08-29 DOI: 10.1016/j.cjsc.2024.100426

Zhuoer Cai , Yinan Zhang , Xiu-Ni Hua , Baiwang Sun

{"title":"Phase transition arising from order-disorder motion in stable layered two-dimensional perovskite","authors":"Zhuoer Cai , Yinan Zhang , Xiu-Ni Hua , Baiwang Sun","doi":"10.1016/j.cjsc.2024.100426","DOIUrl":"10.1016/j.cjsc.2024.100426","url":null,"abstract":"<div><div>In recent years, organic-inorganic hybrid materials are widely designed and synthesized as switching materials for temperature response. However, due to the change of molecular arrangement inside the crystal during solid-solid phase transition, the distortion of crystal lattice and the great change of lattice parameters are often caused, which result in a poor repeatability and short life. Thus, designing phase change materials with small lattice changes helps to improve product life. In this article, a novel organic-inorganic hybrid material 3HDMAPAPbBr4 (1, 3HDMAPA is 3-(hydroxydimethylammonio)propan-1-aminium) was successfully synthesized and characterized. For 1, organic cations filled in the van der Waals gap are connected by hydrogen bonds with halogens in the two-dimensional inorganic layer, forming a stable sandwich structure. During the solid-solid phase transition driven by temperature, the changes of inorganic skeleton are relatively small, and the disorder movement of organic cations does not affect the existence of hydrogen bonds, maintaining a relatively stable crystal structure. In addition, electrical property, optical property and crystal structures are analyzed and discussed in detail. We believe that our work will contribute to the development and application of phase change materials in response materials.</div></div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 11","pages":"Article 100426"},"PeriodicalIF":5.9,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ligand effects on geometric structures and catalytic activities of atomically precise copper nanoclusters 配体对原子精度纳米铜簇几何结构和催化活性的影响

IF 5.9 4区化学

结构化学 Pub Date : 2024-08-17 DOI: 10.1016/j.cjsc.2024.100411

Luyao Lu , Chen Zhu , Fei Li , Pu Wang , Xi Kang , Yong Pei , Manzhou Zhu

{"title":"Ligand effects on geometric structures and catalytic activities of atomically precise copper nanoclusters","authors":"Luyao Lu , Chen Zhu , Fei Li , Pu Wang , Xi Kang , Yong Pei , Manzhou Zhu","doi":"10.1016/j.cjsc.2024.100411","DOIUrl":"10.1016/j.cjsc.2024.100411","url":null,"abstract":"<div>The ligand effects have been extensively investigated in Au and Ag nanoclusters, while corresponding research efforts focusing on Cu nanoclusters remain relatively insufficient. Such a scarcity could primarily be attributed to the inherent instability of Cu nanoclusters relative to their Au/Ag analogues. In this work, we report the controllable preparation and structural determination of a hydride-containing Cu28 nanocluster with a chemical formula of Cu28H10(SPhpOMe)18(DPPOE)3. The combination of Cu28H10(SPhpOMe)18(DPPOE)3 and previously reported Cu28H10(SPhoMe)18(TPP)3 constructs a structure-correlated cluster pair with comparable structures and properties. Accordingly, the ligand effects in directing the geometric structures and physicochemical properties (including optical absorptions and catalytic activities towards the selected hydrogenation) of copper nanoclusters were analyzed. Overall, this work presents a structure-correlated Cu28 pair that enables the atomic-level understanding of ligand effects on the structures and properties of metal nanoclusters.</div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 10","pages":"Article 100411"},"PeriodicalIF":5.9,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142161670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A minireview to ketene chemistry in zeolite catalysis 沸石催化中的烯酮化学小览

IF 5.9 4区化学

结构化学 Pub Date : 2024-08-16 DOI: 10.1016/j.cjsc.2024.100412

Wei Chen, Pieter Cnudde

引用次数: 0

Shining bright: Revolutionary near-unity NIR phosphorescent metal nanoclusters 闪耀光芒革命性的近统一近红外磷光金属纳米团簇

IF 5.9 4区化学

结构化学 Pub Date : 2024-08-14 DOI: 10.1016/j.cjsc.2024.100417

Rakesh Kumar Gupta, Zhi Wang, Di Sun

引用次数: 0