Chinese Chemical Letters最新文献_第8页

Multidimensional droplet manipulation on superhydrophobic surfaces using acoustic tweezers 声学镊子在超疏水表面上的多维液滴操纵

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-24 DOI: 10.1016/j.cclet.2024.110672

Guifeng Wen, Zheyuan Zhong, Yue Fan, Xuelin Tian, Shilin Huang

{"title":"Multidimensional droplet manipulation on superhydrophobic surfaces using acoustic tweezers","authors":"Guifeng Wen, Zheyuan Zhong, Yue Fan, Xuelin Tian, Shilin Huang","doi":"10.1016/j.cclet.2024.110672","DOIUrl":"10.1016/j.cclet.2024.110672","url":null,"abstract":"<div><div>On-demand droplet manipulation plays a critical role in microfluidics, bio/chemical detection and micro-reactions. Acoustic droplet manipulation has emerged as a promising technique due to its non-contact nature, biocompatibility and precision, circumventing the complexities associated with other methods requiring surface or droplet pretreatment. Despite their promise, existing methods for acoustic droplet manipulation often involve complex hardware setups and difficulty for controlling individual droplet amidst multiple ones. Here we fabricate simple yet effective acoustic tweezers for in-surface and out-of-surface droplet manipulation. It is found that droplets can be transported on the superhydrophobic surfaces when the acoustic radiation force surpasses the friction force. Using a two-axis acoustic tweezer, droplets can be maneuvered along arbitrarily programmed paths on the surfaces. By introducing multiple labyrinthine structures on the superhydrophobic surface, individual droplet manipulation is realized by constraining the unselected droplets in the labyrinthine structures. In addition, a three-axis acoustic tweezer is developed for manipulating droplets in three-dimensional space. Potential applications of the acoustic tweezers for micro-reaction, bio-assay and chemical analysis are also demonstrated.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110672"},"PeriodicalIF":9.4,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487363","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

Tailoring interatomic active sites for highly selective electrocatalytic biomass conversion reaction 定制高选择性电催化生物质转化反应的原子间活性位点

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-22 DOI: 10.1016/j.cclet.2024.110670

Xuan Liu, Qing Li

引用次数: 0

Hierarchical zeolites stabilized cobalt(II) as propane dehydrogenation catalyst: Enhanced activity and coke tolerance via alkaline post-treatment 分级沸石稳定钴（II）作为丙烷脱氢催化剂：通过碱性后处理提高活性和耐焦性

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-22 DOI: 10.1016/j.cclet.2024.110663

Kun Yang , Anhui Li , Peng Zhang , Guilin Liu , Liusai Huang , Yumeng Fo , Luyuan Yang , Xiangyang Ji , Jian Liu , Weiyu Song

{"title":"Hierarchical zeolites stabilized cobalt(II) as propane dehydrogenation catalyst: Enhanced activity and coke tolerance via alkaline post-treatment","authors":"Kun Yang , Anhui Li , Peng Zhang , Guilin Liu , Liusai Huang , Yumeng Fo , Luyuan Yang , Xiangyang Ji , Jian Liu , Weiyu Song","doi":"10.1016/j.cclet.2024.110663","DOIUrl":"10.1016/j.cclet.2024.110663","url":null,"abstract":"<div><div>Transition metal cobalt exhibits strong activation capabilities for alkanes, however, the instability of Co sites leads to sintering and coke deposition, resulting in rapid deactivation. Hierarchical zeolites, with their diverse pore structures and high surface areas, are used to effectively anchor metals and enhance coke tolerance. Herein, a post-treatment method using an alkaline solution was employed to synthesize meso‑microporous zeolite supports, which were subsequently loaded with Co species for propane dehydrogenation catalyst. The results indicate that the application of NaOH, an inorganic base, produces supports with a larger mesopore volume and more abundant hydroxyl nests compared to TPAOH, an organic base. UV–vis, Raman, and XPS analyses reveal that Co in the 0.5Co/SN-1–0.05 catalyst is mainly in the form of tetrahedral Co<sup>2+</sup>, which effectively activates C<img>H bonds. In contrast, the 0.5Co/S-1 catalyst contains mainly Co<sub>3</sub>O<sub>4</sub> species. Co<sup>2+</sup> supported on hierarchical zeolites shows better propane conversion (58.6 %) and propylene selectivity (>96 %) compared to pure silica zeolites. Coke characterization indicates that hierarchical zeolites accumulate more coke, but it is mostly in the form of easily removable disordered carbon. The mesopores in the microporous zeolite support help disperse the active Co metal and facilitate coke removal during dehydrogenation, effectively preventing deactivation from sintering and coke coverage.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 5","pages":"Article 110663"},"PeriodicalIF":9.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509951","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

Corrigendum to “Halogenated benzothiadiazole-based conjugated polymers as efficient photocatalysts for dye degradation and oxidative coupling of benzylamines” [Chinese Chemical Letters 33 (2022) 2736–2740] 卤代苯并噻二唑基共轭聚合物作为染料降解和苄胺氧化偶联的高效光催化剂》更正 [中国化学快报 33 (2022) 2736-2740]

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-21 DOI: 10.1016/j.cclet.2024.110616

Chu Chu, Yuancheng Qin, Cailing Ni, Jianping Zou

引用次数: 0

Sulfur reduction reaction mechanism elucidated with in situ Raman spectroscopy 用原位拉曼光谱分析硫还原反应机理

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-20 DOI: 10.1016/j.cclet.2024.110654

Haixia Wu, Kailu Guo

引用次数: 0

Corrigendum to “An overview of polymeric nanomicelles in clinical trials and on the market” [Chinese Chemical Letters 32 (2021) 243-257] 对 "临床试验和市场上的聚合物纳米微孔概述 "的更正 [Chinese Chemical Letters 32 (2021) 243-257]

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-16 DOI: 10.1016/j.cclet.2024.110545

Xue Zheng , Jizhen Xie , Xing Zhang , Weiting Sun , Heyang Zhao , Yantuan Li , Cheng Wang

引用次数: 0

Corrigendum to “Ultrasound augmenting injectable chemotaxis hydrogel for articular cartilage repair in osteoarthritis” [Chinese Chemical Letters 32 (2021) 1759-1764] 超声增强注射化合水凝胶用于骨关节炎的关节软骨修复》更正 [中国化学快报 32 (2021) 1759-1764]

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-16 DOI: 10.1016/j.cclet.2024.110562

Hui Liu , Xi Xiang , Jian-Bo Huang , Bi-Hui Zhu , Li-Yun Wang , Yuan-Jiao Tang , Fang-Xue Du , Ling Li , Feng Yan , Lang Ma , Li Qiu

引用次数: 0

A modified Bis-OPNN phosphorus ligand for Rh-catalyzed linear-selective hydroformylation of alkenes 一种用于铑催化烯烃线性选择性氢甲酰化的改性双opnn磷配体

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-13 DOI: 10.1016/j.cclet.2024.110640

Luyun Zhang , Ding Liu , Huri Piao , Zhenhua Jia , Fen-Er Chen

引用次数: 0

DABCO-catalyzed [3+4] annulations of Schiff bases with α-substituted allenes: Construction of functionalized benzazepine derivatives dabco催化席夫碱与α-取代烯的[3+4]环：功能化苯二氮衍生物的构建

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-13 DOI: 10.1016/j.cclet.2024.110646

Ke Wu , Xiuqin Ruan , Shuolei Jia, Enyuan Wang, Qingfa Zhou

引用次数: 0

Attracting magnetic BDD particles onto Ti/RuO2-IrO2 by using a magnet: A novel 2.5-dimensional electrode for electrochemical oxidation wastewater treatment 利用磁铁将磁性 BDD 粒子吸引到 Ti/RuO2-IrO2 上：用于电化学氧化废水处理的新型 2.5 维电极

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-11-10 DOI: 10.1016/j.cclet.2024.110641

Dan Shao , Yujing Lyu , Chengyuan Liu , Hao Wang , Ning Ma , Hao Xu , Wei Yan , Xiaohua Jia , Haojie Song

{"title":"Attracting magnetic BDD particles onto Ti/RuO2-IrO2 by using a magnet: A novel 2.5-dimensional electrode for electrochemical oxidation wastewater treatment","authors":"Dan Shao , Yujing Lyu , Chengyuan Liu , Hao Wang , Ning Ma , Hao Xu , Wei Yan , Xiaohua Jia , Haojie Song","doi":"10.1016/j.cclet.2024.110641","DOIUrl":"10.1016/j.cclet.2024.110641","url":null,"abstract":"<div><div>Boron-doped diamond (BDD) is a well-known anode material with a high pollutant degradation ability for electrochemical oxidation wastewater treatment. Nevertheless, the cost of production and mechanical strength of BDD membranes remain unsatisfactory. Magnetic BDD particles derived from industrial waste may represent a promising alternative to BDD membranes, although the challenge remains in assembling these particles into a usable electrode. In this study, magnetic BDD particles were attracted to a Ti/RuO<sub>2</sub>-IrO<sub>2</sub> electrode using a magnet, thus constituting a novel 2.5-dimensional (2.5D) electrode. To ascertain the structure-activity relationship of the novel electrode, essential characterizations, multi-physics simulations, pollutant degradation and electrosynthesis experiments were conducted. The results indicate that an appropriate quantity of BDD particles (0.1 g/cm<sup>2</sup>) can enhance the number of active sites by approximately 20%. A strong synergistic effect was observed between the Ti/RuO<sub>2</sub>-IrO<sub>2</sub> and BDD particles in the degradation of various pollutants, including azo dye, <em>p</em>-benzoquinone, succinic acid and four kinds of real wastewaters, as well as glycerol conversion. The joint active sites on the interface between Ti/RuO<sub>2</sub>-IrO<sub>2</sub> and BDD particles, as well as the inner active sites on BDD particles, have been identified as crucial in the mineralization of pollutants and the generation of value-added products. The optimal amount of BDD particles (0.1 g/cm<sup>2</sup>) is sufficient to preserve the joint active sites and to maintain an adequate polarization on the BDD particles. Nevertheless, the hybrid feature of the 2.5D electrode is diminished when a greater quantity of BDD particles (0.3 g/cm<sup>2</sup>) is loaded.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 6","pages":"Article 110641"},"PeriodicalIF":9.4,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830259","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