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    					Enzyme@bismuth-ellagic acid: a versatile platform for enzyme immobilization with enhanced acid-base stability  | 
  					 
  					  										
						Junyang Xu1, Guanhua Liu1,2, Ying He1( ), Liya Zhou1, Li Ma1, Yunting Liu1, Xiaobing Zheng1,2, Jing Gao1, Yanjun Jiang1,2( ) | 
					 
															
						1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China 2. National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, Hebei University of Technology, Tianjin 300130, China | 
					 
										
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													     		                            						                            																	    Abstract  In situ encapsulation is an effective way to synthesize enzyme@metal–organic framework biocatalysts; however, it is limited by the conditions of metal–organic framework synthesis and its acid-base stability. Herein, a biocatalytic platform with improved acid-base stability was constructed via a one-pot method using bismuth-ellagic acid as the carrier. Bismuth-ellagic acid is a green phenol-based metal–organic framework whose organic precursor is extracted from natural plants. After encapsulation, the stability, especially the acid-base stability, of amyloglucosidases@bismuth-ellagic acid was enhanced, which remained stable over a wide pH range (2–12) and achieved multiple recycling. By selecting a suitable buffer, bismuth-ellagic acid can encapsulate different types of enzymes and enable interactions between the encapsulated enzymes and cofactors, as well as between multiple enzymes. The green precursor, simple and convenient preparation process provided a versatile strategy for enzymes encapsulation. 
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															| Keywords 
																																																				bismuth-ellagic acid  
																		  																																				in situ encapsulation  
																		  																																				enzyme@MOF biocomposites  
																																			  
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																																Corresponding Author(s):
																Ying He,Yanjun Jiang   
																													     		
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																																														Online First Date: 31 March 2023   
																																														Issue Date: 17 May 2023
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