Zobrazeno 1 - 10
of 304
pro vyhledávání: '"Valentin, Valtchev"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract This paper presents the results of an analysis of the porous structure of spherical activated carbons obtained from cation-exchange resin beads subjected to ion exchange prior to activation. The study investigated the effects of the type of
Externí odkaz:
https://doaj.org/article/fb969776f9994864a40c6cec7446441b
Autor:
Jianhong Chang, Fengqian Chen, Hui Li, Jinquan Suo, Haorui Zheng, Jie Zhang, Zitao Wang, Liangkui Zhu, Valentin Valtchev, Shilun Qiu, Qianrong Fang
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024)
Abstract The synthesis of three-dimensional covalent organic frameworks with highly connected building blocks presents a significant challenge. In this study, we report two 3D COFs with the nia topology, named JUC-641 and JUC-642, by introducing plan
Externí odkaz:
https://doaj.org/article/353e85cf673e4412b65488508d700501
Autor:
Jianhong Chang, Cuiyan Li, Xiaoxia Wang, Daohao Li, Jie Zhang, Xiaoming Yu, Hui Li, Xiangdong Yao, Valentin Valtchev, Shilun Qiu, Qianrong Fang
Publikováno v:
Nano-Micro Letters, Vol 15, Iss 1, Pp 1-12 (2023)
Highlights JUC-610-nanosheet exhibits highly efficient oxygen reduction reaction (ORR) catalytic activity in alkaline electrolyte with half-wave potential of 0.72 V versus reversible hydrogen electrode, which is one of the best covalent organic frame
Externí odkaz:
https://doaj.org/article/2476b77867724324bc524586162d3af5
Publikováno v:
Green Energy & Environment, Vol 5, Iss 4, Pp 394-404 (2020)
Zeolites and zeo-type materials with nanosized dimensions are of great practical interest owing to their favorable transport properties, faster adsorption kinetics, and large external surface area. This mini-review presents recent developments in the
Externí odkaz:
https://doaj.org/article/f599bf4056fd40d28bdd83c368ff2b88
Publikováno v:
Advanced Science, Vol 9, Iss 4, Pp n/a-n/a (2022)
Abstract This paper deals with the synthesis conditions–defect formation relationship in zeolites. Silicalite‐1 (MFI‐type) is used as a model material. Samples synthesized from a system with high basicity (at 100 °C), a system with moderate ba
Externí odkaz:
https://doaj.org/article/ceceb94a3dce4843ac899afba351a3a1
Autor:
Zhengxing Qin, Shu Zeng, Georgian Melinte, Tomáš Bučko, Michael Badawi, Yanfeng Shen, Jean‐Pierre Gilson, Ovidiu Ersen, Yingxu Wei, Zhongmin Liu, Xinmei Liu, Zifeng Yan, Shutao Xu, Valentin Valtchev, Svetlana Mintova
Publikováno v:
Advanced Science, Vol 8, Iss 17, Pp n/a-n/a (2021)
Abstract Hierarchical zeolites are regarded as promising catalysts due to their well‐developed porosity, increased accessible surface area, and minimal diffusion constraints. Thus far, the focus has been on the creation of mesopores in zeolites, ho
Externí odkaz:
https://doaj.org/article/ee4c87bfc8734952917cf52a1a97adea
Autor:
Yaozu Liu, Jingwei Li, Jia Lv, Zitao Wang, Jinquan Suo, Junxia Ren, Jianchuan Liu, Dong Liu, Yujie Wang, Valentin Valtchev, Shilun Qiu, Daliang Zhang, Qianrong Fang
Publikováno v:
Journal of the American Chemical Society. 145:9679-9685
Although isomerism is a typical and significant phenomenon in organic chemistry, it is rarely found in covalent organic framework (COF) materials. Herein, for the first time, we report a controllable synthesis of topological isomers in three-dimensio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69952f4c1de3f2c42b498b08621c04fd
https://doi.org/10.1021/jacs.3c01070
https://doi.org/10.1021/jacs.3c01070
Autor:
Ping He, Qisong Yi, Huawei Geng, Yuanchao Shao, Meng Liu, Zhijie Wu, Wenhao Luo, Yuanshuai Liu, Valentin Valtchev
Publikováno v:
ACS Catalysis. 12:14717-14726
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a14114e7d8cf56807f474ceac5aa11fe
https://doi.org/10.1021/acscatal.2c04597
https://doi.org/10.1021/acscatal.2c04597
Autor:
Petko St. Petkov, Kristina Simeonova, Iskra Z. Koleva, Hristiyan A. Aleksandrov, Yoshihiro Kubota, Satoshi Inagaki, Valentin Valtchev, Georgi N. Vayssilov
Publikováno v:
Molecules, Vol 26, Iss 23, p 7296 (2021)
We used computational modeling, based on Density Functional Theory, to help understand the preference for the formation of silanol nests and the substitution of Si by Ti or Al in different crystallographic positions of the MSE-type framework. All the
Externí odkaz:
https://doaj.org/article/6cb4cee8e7ae43998c9ad6fe166479c2
Autor:
Etienne P. Hessou, Lucie A. Bédé, Hicham Jabraoui, Abderrahmane Semmeq, Michael Badawi, Valentin Valtchev
Publikováno v:
Molecules, Vol 26, Iss 18, p 5486 (2021)
In this study, density functional theory (DFT) calculations have been performed to investigate the adsorption mechanisms of toluene and water onto various cationic forms of Y zeolite (LiY, NaY, KY, CsY, CuY and AgY). Our computational investigation r
Externí odkaz:
https://doaj.org/article/15a3fb41172d4e5d94f083be599ac370