Adsorbent, method for manufacturing the same, adsorption sheet, artificial dialysis membrane, and artificial dialyzer

A method for manufacturing an adsorbent, the method comprising:

• (a) preparing a precursor represented by:
• MmAXn
• where, M represents at least one Group-3, -4, -5, -6, or -7 metal,
• X represents a carbon atom, a nitrogen atom, or a combination thereof,
• A represents at least one Group-12, -13, -14, -15, or -16 element,
• n is 1 to 4, and
• m is larger than n, and equal to or less than 5;
• (b1) etching the precursor using an etching solution so as to remove at least a part of atoms A from the precursor to obtain an etched product;
• (c1) washing the etched product with water to obtain a water-washed product;
• (d1) conducting Li intercalation including a process of mixing the water-washed product with a Li-containing compound to obtain a Li-intercalated product;
• (e) conducting delamination including a process of stirring the Li-intercalated product to obtain a delaminated product;
• (f) conducting acid treatment including a process of mixing the delaminated product with an acid solution to obtain an acid-treated product;
• and
• (g) washing the acid-treated product with water to obtain the adsorbent, the adsorbent having a Li content of 0.0001% by mass to 0.0020% by mass.

A method for manufacturing an adsorbent, the method comprising:

• (a) preparing a precursor represented by:
• MmAXn
• where, M represents at least one Group-3, -4, -5, -6, or -7 metal,
• X represents a carbon atom, a nitrogen atom, or a combination thereof,
• A represents at least one Group-12, -13, -14, -15, or -16 element,
• n is 1 to 4, and
• m is larger than n, and equal to or less than 5;
• (b2) etching the precursor using an etching solution that contains a Li-containing compound so as to remove at least a part of atoms A from the precursor concurrently with Li intercalation to obtain an etched-and-Li-intercalated product;
• (c2) washing the etched-and-Li-intercalated product with water to obtain a water-washed product;
• (e) conducting delamination including a process of stirring the water-washed product to obtain a delaminated product;
• (f) conducting acid treatment including a process of mixing the delaminated product with an acid solution to obtain an acid-treated product;
• and
• (g) washing the acid-treated product with water to obtain the adsorbent, the adsorbent having a Li content of 0.0001% by mass to 0.0020% by mass.