Lieu Anh Hao * , Nguyen Duy Khanh , Nguyen Thi Diem Huong , Nguyen Ngoc Khanh Anh and Nguyen Thi Tuyet Nhung

* Corresponding authorLieu Anh Hao

Abstract

Zeolitic imidazole framework-HL1 (ZIF-HL1) is solvothermally synthesized by the reaction of zinc nitrate hexahydrate and the mixture of two imidazolate linkers, 2-methylimidazole and 5-benzimidazole in N,N-dimethylformamide. The structure of ZIF-HL1 was determined by X-ray diffraction analysis, which is indicative the cubic system with cell parameters of a = b = c = 17.4512 Å and Vcell = 5314.64 Å3. This material was also demonstrated to be highly porous, water stable, and exhibited high affinity to CO2. The CO2 isosteric heat adsorption of ZIF-HL1 of 29 kJ mol-1 is competitive to reported ZIFs with highest CO2 affinity.
Keywords: Zeolitic imidazole frameworks, linker imidazole, adsorption isotherm

Tóm tắt

Vật liệu khung cơ kim cấu trúc zeolite-HL1 (ZIF-HL1) được tạo thành từ phản ứng nhiệt dung môi của kẽm nitrate với hỗn hợp hai linker imidazole, 2-methylimidazole và 5-benzimidazole, trong dung môi N,N-dimethylformamide. Cấu trúc của ZIF-HL1 được xác định bằng phân tích nhiễu xạ tia X, cho kết quả của hệ tinh thể lập phương với các thông số mạng cơ sở a = b = c = 17.45 Å và Vô mạng = 5314.64 Å3. Vật liệu ZIF-HL1 còn thể hiện là một vật liệu có độ xốp cao, bền trong nước và có ái lực tốt với CO2. Nhiệt hấp phụ CO2 của ZIF-HL1 là 29 kJ mol-1, được xếp vào hàng các vật liệu ZIF đã công bố có ái lực tốt nhất với CO2.
Từ khóa: Vật liệu khung cơ kim cấu trúc zeolite, imidazole, đường hấp phụ đẳng nhiệt

Article Details

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