نتایج جستجو برای: zif 67

تعداد نتایج: 71974  

Journal: :Chemical communications 2011
Yichang Pan Yunyang Liu Gaofeng Zeng Lan Zhao Zhiping Lai

We report here the first example of ZIF materials synthesized in aqueous solution. The synthesis was performed at room temperature and typically took several minutes compared to hours and days in non-aqueous conditions. The obtained product were ZIF-8 nanocrystals having size of ~85 nm and showed excellent thermal, hydrothermal and solvothermal stabilities.

Journal: :Chemical communications 2012
Bishnu P Biswal Tamas Panda Rahul Banerjee

Here we report a highly porous, water stable Co based ZIF [CoNIm (RHO)] and its solution mediated phase transformation to a less porous and water unstable ZIF [CoNIm (SOD)]. CoNIm (RHO) has high Langmuir surface area [2087 m(2) g(-1)] as well as high water adsorption [200 cm(3) (STP) g(-1)] capacity.

Journal: :Chemical communications 2013
Rizhi Chen Jianfeng Yao Qinfen Gu Stef Smeets Christian Baerlocher Haoxue Gu Dunru Zhu William Morris Omar M Yaghi Huanting Wang

A new two-dimensional zeolitic imidazolate framework (named as ZIF-L) was synthesized in zinc salt and 2-methylimidazole (Hmim) aqueous solution at room temperature. ZIF-L (Zn(mim)2·(Hmim)1/2·(H2O)3/2 or C10H16N5O3/2Zn) has unique cushion-shaped cavities and leaf-like crystal morphology, and exhibits excellent CO2 adsorption properties.

Journal: :Science China. Materials 2021

An efficient photocatalytic CO2 reduction has been reported in ZIF-67-derived-Co nanoparticles (NPs) encapsulated nitrogen-doped carbon layers (N-C/Co). This work demonstrates that the pyrolysis temperature is crucial tuning grain size and components of metallic Co0 N-C/Co composite catalysts, which optimizes their activities. Syntheses were conducted at 600, 700, 800°C giving N-C/Co-600, N-C/C...

Journal: :Development 2010
Tugba Guven-Ozkan Scott M Robertson Yuichi Nishi Rueyling Lin

Specification of primordial germ cells requires global repression of transcription. In C. elegans, primordial germ cells are generated through four rounds of asymmetric divisions, starting from the zygote P0, each producing a transcriptionally repressed germline blastomere (P1-P4). Repression in P2-P4 requires PIE-1, which is provided maternally in oocytes and segregated to all germline blastom...

در این پژوهش چارچوب آلی- فلزی زئولیتی ایمیدازولات هشت (ZIF-8) به‌عنوان یک جاذب جدید برای حذف یونهای آرسنات از محلول آبی مورد استفاده قرارگرفت. ذره‌های بلوری ZIF-8 به‌صورت موفقیت‌آمیز با استفاده از روش آب‌گرمایی و با اعمال عامل دما ساخته شد. تعیین مشخصه‌های جاذب با استفاده از روش‌های جذب نیتروژن، پراش پرتو ایکس، طیف‌سنجی فروسرخ تبدیل فوریه و میکروسکوپ الکترونی روبشی انجام شد. اثر متغیرهای غلظت ا...

Journal: :Energy materials 2023

The feasibility of the commercialization lithium-sulfur (Li-S) batteries is troubled by sluggish redox conversion kinetics and shuttle effect polysulfides. Herein, a zeolitic imidazolate framework derived amorphous CoP combined with carbon nanotubes conductive network composites (aCoP@CNTs) has been synthesized as an effective dual-electrocatalyst for accelerating polysulfides to prolong lifesp...

Journal: :Angewandte Chemie 2014
Cristina Mottillo Tomislav Friščić

Zeolitic imidazolate frameworks of zinc, cobalt, and cadmium, including the framework ZIF-8 commercially sold as Basolite Z1200, exhibit surprising sensitivity to carbon dioxide under mild conditions. The frameworks chemically react with CO2 in the presence of moisture or liquid water to form carbonates. This effect, which has been previously not reported in metal-organic framework chemistry, p...

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