A novel and simple concept is proposed to synthesize magnetic sorbent of nano silver particles on zeolite for mercury capture from flue gases. The unique feature of magnetic property of the nanocomposite particles makes the subsequent separation of the magnetic sorbents from complex multiphase systems convenient and effective. In this synthesis, a dense liquid silica (DLS) is spread on micron-sized magnetite (Fe3O4) particles. The DLS-coating on magnetite provides an effective protection of magnetite particles from corrosion/oxidation in the excessive application environments. At the same time, DLS-coating acts as a bridge to bind the DLS-coated magnetite with zeolite particles of desired molecular sieve properties in organic solvent. During high temperature sintering, the dense liquid silica bridge experiences polycondensation/dehydration on both magnetite and zeolite particles, leading to the formation of uniformly distributed magnetite-zeolite composites. These mechanically stable composites feature both magnetic and molecular sieve properties. Following silver ion exchange and controlled thermal reduction, nano silver particles are distributed on the surface of zeolite in the magnetic composites, forming a new class of magnetic functional materials of potential applications as novel catalysts or for bacteria disinfection of municipal water and mercury removal from industrial waste. The success of synthesizing magnetic zeolite composite loaded with silver nano particles was confirmed by x-ray photonelectron spectroscopy (XPS), scanning electron microscopy/energy dispersive x-ray analysis (SEM/EDX), transmission electron microscopy (TEM), electrokinetic analysis and measurement of magnetic property. The synthesized magnetic sorbent exhibits superior performance of mercury capture by amalgamation and the captured mercury can be removed by mild thermal treatment, allowing recycle of spent sorbent.