Chinese Chemical Letters最新文献_第3页

Correlating vacancy-defect density with CO2 activation for promoted CO2 methanation over CsPbBr3 photocatalyst CsPbBr3光催化剂上促进CO2甲烷化的空位缺陷密度与CO2活化的关系

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-03-05 DOI: 10.1016/j.cclet.2025.111034

Hui Bian , Xinyi Yuan , Nan Zhang , Zhuo Xu , Juhong Lian , Ruibin Jiang , Junqing Yan , Deng Li , Shengzhong (Frank) Liu

{"title":"Correlating vacancy-defect density with CO2 activation for promoted CO2 methanation over CsPbBr3 photocatalyst","authors":"Hui Bian , Xinyi Yuan , Nan Zhang , Zhuo Xu , Juhong Lian , Ruibin Jiang , Junqing Yan , Deng Li , Shengzhong (Frank) Liu","doi":"10.1016/j.cclet.2025.111034","DOIUrl":"10.1016/j.cclet.2025.111034","url":null,"abstract":"<div><div>Constructing vacancy-decorated metal halide perovskites (MHPs) have emerged as promising pathway to enhance photocatalytic activity and selectivity for solar CO2 reduction. However, the controllable construction of vacancy defects is still challenging, and our understanding of the roles of these defects, particularly their effects on the adsorption activation of surface reaction molecules, is still insufficient. Herein, we elaborately designed and synthesized adjustable Br vacancies in CsPbBr3 catalysts by manipulating the dissolution and recrystallization speed of precursors during the ball milling process using solvents with gradient polarities. We found that the Br vacancies could promote the charge separation, while having slight influence on the band structure of CsPbBr3. More importantly, temperature-programmed desorption results combined with theoretical calculations revealed that Br vacancies can significantly enhance the adsorption of CO2 and CO on the surface, specifically increasing the adsorption strength between CO and the active sites. This finding provides a substantial opportunity for achieving high activity and selectivity in photocatalytic CO2 methanation. Accordingly, a high rate of CO2 photoreduction to CH4 up to 17.94 ± 0.81 μmol g-1 h-1 along with superior selectivity of 95.8% were acquired for CsPbBr3<img>HX featuring with the richest Br vacancy defects, which is 18.9-fold compared that of CsPbBr3<img>CAN with the lowest Br vacancy defects. This investigation deepens insights into action mechanism of defects on halide perovskites catalysts, offering a novel strategy for the high-effective conversion of CO2 into valuable products.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 7","pages":"Article 111034"},"PeriodicalIF":9.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

TPE-embedded functional macrocycles: From structural design to photophysical property and application 嵌入tpe的功能大环：从结构设计到光物理性质和应用

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-03-04 DOI: 10.1016/j.cclet.2025.111026

Jianmin Jiao , Jiehao Yu , Xueqi Tian , Xiao-Yu Hu

引用次数: 0

Photocatalytic production of high-value-added fuels from biodegradable PBAT by Nb2O5/GCN heterojunction catalyst: Performance and mechanism Nb2O5/GCN异质结催化剂光催化可降解PBAT制备高附加值燃料：性能与机理

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-03-04 DOI: 10.1016/j.cclet.2025.111029

Runzi Cao , Heng Shao , Xinjie Wang , Jian Wang , Enxiang Shang , Yang Li

{"title":"Photocatalytic production of high-value-added fuels from biodegradable PBAT by Nb2O5/GCN heterojunction catalyst: Performance and mechanism","authors":"Runzi Cao , Heng Shao , Xinjie Wang , Jian Wang , Enxiang Shang , Yang Li","doi":"10.1016/j.cclet.2025.111029","DOIUrl":"10.1016/j.cclet.2025.111029","url":null,"abstract":"<div><div>Photocatalysis holds great promise for the conversion of plastic waste into valuable chemicals. However, the conversion efficiency is constrained by the poor carriers' separation efficiency over the single component photocatalyst. Herein, we synthesized a novel type Ⅱ Nb2O5/GCN heterojunction to investigate its efficiency in the photocatalytic upcycling of polybutylene adipate/terephthalate (PBAT) microplastics (MPs) into acids and alcohols under visible light irradiation (100 mW/cm2). The findings indicate that the charge transfer within the type Ⅱ Nb2O5/GCN occurs from the conduction band of GCN to the conduction band of Nb2O5, thereby enhancing the separation efficiency of carriers Notably, the rates of ethanol and acetic acid generation from 1.5 mg/mL PBAT MPs treated with the 60 %Nb2O5/GCN photocatalyst were 21.8-fold and 1.8-fold higher, respectively, compared to those by Nb2O5 alone. Density functional theory calculations demonstrate that the hydroxyl radicals (•OH) produced by the Nb2O5/GCN heterojunction cleaves the ester bond (O<img>C=O) of PBAT MP into the monomer. These monomers are subsequently converted into acids and alcohols through various reactions, including C<img>C bond cleavage, hydrodeoxygenation, and C<img>C bond coupling. This study highlights the effectiveness of heterojunction photocatalyst in converting PBAT MPs into valuable chemicals, thus significantly promoting advancements in bioplastics recycling.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 7","pages":"Article 111029"},"PeriodicalIF":9.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Novel vinylene-bridged covalent organic framework based on diketopyrrolopyrrole with exceptional photothermal properties 基于二酮吡咯的新型乙烯桥共价有机骨架具有优异的光热性能

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-03-03 DOI: 10.1016/j.cclet.2025.111028

Tianwen Chen , Chunqiang Cai , Li Chen , Yanlin Chen , Lichun Dong , Luxi Tan , Zitong Liu

引用次数: 0

Conformationally adaptive metal–organic cages for dynamic guest encapsulation 动态客体封装构象适应性金属有机笼

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-02-26 DOI: 10.1016/j.cclet.2025.111007

Yujuan Zhou , Kecheng Jie

引用次数: 0

Exploring the potential and challenges of molecular-squeeze adsorption in sponge-like crystals 探索海绵状晶体中分子挤压吸附的潜力和挑战

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-02-25 DOI: 10.1016/j.cclet.2025.111004

Yujuan Zhou, Jie Yang

引用次数: 0

Reduction of methane emission from microbial fuel cells during sulfamethoxazole wastewater treatment 在磺胺甲噁唑废水处理过程中减少微生物燃料电池的甲烷排放

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-02-23 DOI: 10.1016/j.cclet.2025.110997

Shilong Li , Liang Duan , Qiusheng Gao , Hengliang Zhang

引用次数: 0

Palladium-catalyzed modular biomimetic synthesis of lignans derivatives 钯催化木脂素衍生物的模块化仿生合成

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-02-22 DOI: 10.1016/j.cclet.2025.110969

Junlong Tang, Yuhan Zhao, Yangbin Jin, Liren Zhang, Yuanfang Wang, Wanqing Wu, Huanfeng Jiang

引用次数: 0

Phase diagram as a lens for unveiling thermodynamics trends in lithium–sulfur batteries 相图作为揭示锂硫电池热力学趋势的透镜

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-02-21 DOI: 10.1016/j.cclet.2025.110986

Bo-Bo Zou, Hong-Jie Peng

引用次数: 0

IFC - Editorial Board/ Publication info IFC -编辑委员会/出版信息

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2025-02-19 DOI: 10.1016/S1001-8417(25)00059-2

引用次数: 0