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3D printing is recognized as a powerful tool to develop complex geometries
for a variety of materials including nanocellulose. Herein, a one-pot synthesis
of 3D printable hydrogel ink containing zeolitic imidazolate frameworks
(ZIF-8) anchored on anionic 2,2,6,6-tetramethylpiperidine-1-oxylradicalmediated oxidized cellulose nanofibers (TOCNF) is presented. The synthesis
approach of ZIF-8@TOCNF (CelloZIF8) hybrid inks is simple, fast (≈30 min),
environmentally friendly, takes place at room temperature, and allows easy
encapsulation of guest molecules such as curcumin. Shear thinning properties of the hybrid hydrogel inks facilitate the 3D printing of porous scaffolds
with excellent shape fidelity. The scaffolds show pH controlled curcumin
release. The synthesis route offers a general approach for metal–organic
frameworks (MOF) processing and is successfully applied to other types of
MOFs such as MIL-100 (Fe) and other guest molecules as methylene blue.
This study may open new venues for MOFs processing and its large-scale
applications.

A Facile Synthesis and Reactions of Some Novel Pyrazole-based Heterocycles.
تخليق وتفاعلات بعض مركبات عضوية جديدة مرتكزة على حلقة بيرازول

A Facile Synthesis and Reactions of Some Novel Pyrazole-based Heterocycles.
تخليق وتفاعلات بعض مركبات عضوية جديدة مرتكزة على حلقة بيرازول

A Facile Synthesis and Reactions of Some Novel Pyrazole-based Heterocycles.
تخليق وتفاعلات بعض مركبات عضوية جديدة مرتكزة على حلقة بيرازول

Synthesis of New Heterocycles from Reactions of 1-Phenyl-1H-pyrazolo[3,4-b]pyridine-5-carbonyl -pyrazolo[3,4-b]pyridine.
تخليق مركبات عضوية جديدة غير متجانسة الحلقة من تفاعلات 1-فينيل-1هـ- بيرازولو(3،4-ب)بيرازين- 5- كربونيل أزيد

Hydrogen gas has been considered as one of the promising sources of energy. Thus, several strategies including the hydrolysis of hydrides have been reported for hydrogen production. However, effective catalysts are highly required to improve the hydrogen generation rate. Two dimensional metal-organic frameworks (copper-benzene-1,4-dicarboxylic, CuBDC), and CuBDC-derived CuO@C were synthesized, characterized and applied as catalysts for hydrogen production using the hydrolysis and methanolysis of sodium borohydride (NaBH4). CuBDC, and CuO@C display hydrogen generation rate of 7620, and 7240 mlH2·gcat−1· min−1, respectively for hydrolysis. While, CuBDC offers hydrogen generation rate of 9060 mlH2·gcat−1· min−1 for methanolysis. Both catalysts required short reaction time, and showed good recyclability. The materials may open new venues for efficient catalyst for energy-based applications.

Hydrogen gas has been considered as one of the promising sources of energy. Thus, several strategies including the hydrolysis of hydrides have been reported for hydrogen production. However, effective catalysts are highly required to improve the hydrogen generation rate. Two dimensional metal-organic frameworks (copper-benzene-1,4-dicarboxylic, CuBDC), and CuBDC-derived CuO@C were synthesized, characterized and applied as catalysts for hydrogen production using the hydrolysis and methanolysis of sodium borohydride (NaBH4). CuBDC, and CuO@C display hydrogen generation rate of 7620, and 7240 mlH2·gcat−1· min−1, respectively for hydrolysis. While, CuBDC offers hydrogen generation rate of 9060 mlH2·gcat−1· min−1 for methanolysis. Both catalysts required short reaction time, and showed good recyclability. The materials may open new venues for efficient catalyst for energy-based applications.

Hydrogen gas has been considered as one of the promising sources of energy. Thus, several strategies including the hydrolysis of hydrides have been reported for hydrogen production. However, effective catalysts are highly required to improve the hydrogen generation rate. Two dimensional metal-organic frameworks (copper-benzene-1,4-dicarboxylic, CuBDC), and CuBDC-derived CuO@C were synthesized, characterized and applied as catalysts for hydrogen production using the hydrolysis and methanolysis of sodium borohydride (NaBH4). CuBDC, and CuO@C display hydrogen generation rate of 7620, and 7240 mlH2·gcat−1· min−1, respectively for hydrolysis. While, CuBDC offers hydrogen generation rate of 9060 mlH2·gcat−1· min−1 for methanolysis. Both catalysts required short reaction time, and showed good recyclability. The materials may open new venues for efficient catalyst for energy-based applications.

Hydrogen gas has been considered as one of the promising sources of energy. Thus, several strategies including the hydrolysis of hydrides have been reported for hydrogen production. However, effective catalysts are highly required to improve the hydrogen generation rate. Two dimensional metal-organic frameworks (copper-benzene-1,4-dicarboxylic, CuBDC), and CuBDC-derived CuO@C were synthesized, characterized and applied as catalysts for hydrogen production using the hydrolysis and methanolysis of sodium borohydride (NaBH4). CuBDC, and CuO@C display hydrogen generation rate of 7620, and 7240 mlH2·gcat−1· min−1, respectively for hydrolysis. While, CuBDC offers hydrogen generation rate of 9060 mlH2·gcat−1· min−1 for methanolysis. Both catalysts required short reaction time, and showed good recyclability. The materials may open new venues for efficient catalyst for energy-based applications.