Adsorptive degradation of dimethyl methylphosphonate over Zr-based metal–organic framework built from 3,3′,5,5′-azobenzenetetracarboxylic acid

Adsorption capacities of four types of ZIF-8 with different morphologies and surface charges for chemical warfare agent simulants

“…The adsorption capacities of the three ZIF-8 samples were slightly different, and the DMMP adsorption capacity of C-ZIF-8 was the highest at 530 mg of DMMP per gram of ZIF-8 (530 mg/g). This value is considerably higher than those of other porous materials, including porous carbon and other MOFs 3,7,10 . The DMMP adsorption capacities of RD-ZIF-8 and L-ZIF-8 were found to be 412 and 383 mg/g (Fig.…”

“…Chemical warfare agents (CWAs) are highly toxic substances that cause serious long-term damage to humans [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] . Isopropyl methylphosphono uoridate, known as sarin and GB, is an extremely toxic G-type organophosphorus nerve agent that inhibits acetylcholinesterase and causes muscle contraction and asphyxiation through chemical and physical interactions with substrates [1][2][3][4][5][6][7] .…”

“…Despite the strong will of the international community to protect humans from highly dangerous CWAs, the use of CWAs in military activities, armed con icts, or terrorist attacks is still occurring, and strategies to mitigate their hazardous effects must be developed. In this context, the effective adsorption, removal, and detoxi cation of CWAs are of great importance [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] . In particular, adsorptive porous materials for e cient adsorption of CWAs must be urgently developed toward human safety.…”

“…MOFs are currently used in many practical applications, such as gas storage, separation, adsorption, catalysis, and sensing [4][5][6][7][8][9][10][11][12][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] . Numerous studies have been conducted to absorb or separate targeted molecules [18][19][20][21][22][23][24][25] , including CWA simulants using MOFs [4][5][6][7][8][9][10][11][12] . Among the many MOFs, ZIF-8 is a highly applicable MOF owing to its robust porosity and high thermal and chemical stabilities 34 .…”

“…In particular, adsorptive porous materials for e cient adsorption of CWAs must be urgently developed toward human safety. Currently, porous carbons, zeolites, and metal-organic frameworks (MOFs) have shown great potential for the effective adsorption of CWAs [3][4][5][6][7][8][9][10][11][12][13][14][15] . Simulants with functionalities similar to CWAs, but with less toxicity and thus convenient to handle in the laboratory, such as 2-chloroethyl ethyl sul de (CEES) and dimethyl methyl phosphonate (DMMP), are considered as CWA substitutes for this research.…”