Prussian Blue: A Safe Pigment with Zeolitic-Like Activity

Abstract

Prussian blue (PB) and PB analogues (PBA) are coordination network materials that present important similarities with zeolites concretely with their ability of adsorbing cations. Depending on the conditions of preparation, which is cheap and easy, PB can be classified into soluble PB and insoluble PB. The zeolitic-like properties are mainly inherent to insoluble form. This form presents some defects in its cubic lattice resulting in an open structure. The vacancies make PB capable of taking up and trapping ions or molecules into the lattice. Important adsorption characteristics of PB are a high specific area (370 m2 g−1 determined according the BET theory), uniform pore diameter, and large pore width. PB has numerous applications in many scientific and technological fields. PB are assembled into nanoparticles that, due to their biosafety and biocompatibility, can be used for biomedical applications. PB and PBA have been shown to be excellent sorbents of radioactive cesium and radioactive and nonradioactive thallium. Other cations adsorbed by PB are K+, Na+, NH4+, and some divalent cations. PB can also capture gaseous molecules, hydrocarbons, and even luminescent molecules such as 2-aminoanthracene. As the main adsorptive application of PB is the selective removal of cations from the environment, it is important to easily separate the sorbent of the purified solution. To facilitate this, PB is encapsulated into a polymer or coats a support, sometimes magnetic particles. Finally, is remarkable to point out that PB can be recycled and the adsorbed material can be recovered.

Prussian Blue Analogues for Sodium‐Ion Batteries: Past, Present, and Future

“…Thus, there is no doubt that the intrinsic safety of the PBAs would benefit their application as electrode materials for SIBs. [97] Among the general synthesis routes the PBAs, the decomposition of a hexacynometallate salt should be rethought due to its low yield and fatal cyanide by-products. [84] To achieve safe SIBs, thermal failure caused by the inevitable heat generation during the charge/discharge process, external damage, and abuse during operation or storage is still a critical issue.…”

Prussian Blue: A Nanozyme with Versatile Catalytic Properties

“…Moreover, it is found in the List of Essential Medicines of the World Health Organization [ 12 ]. Apart from the excellent adsorptive properties [ 13 ], facilitated by the mesoporous structure, PBNPs have shown catalytic activities, due to the iron atoms that act as metal active sites for catalysis. The different states of oxidation are responsible for the multicatalytic properties of these nanoparticles: one can find a fully oxidized form of Prussian blue (the so-called Prussian yellow, PY), a partially oxidized form (Berlin green, BG), and a reduced form (Prussian white, PW) ( Figure 1 ).…”

Electrochemical Sensing and Removal of Cesium from Water Using Prussian Blue Nanoparticle-Modified Screen-Printed Electrodes

“…Accordingly, many reports on the use of PB and its analogs have demonstrated the removal of cesium ions [4][5][6][7][8][9][10][11]. These reports [4][5][6][7][8][9][10][11] confirmed the active role of PB in cesium adsorption; the removal efficiency of cesium is the function of parameters associated with the properties of PB and the additives that are used to prepare the adsorbent. In addition, PB exhibited welldefined redox electrochemistry associated with two redox couples, PB/PB white (PW) and PB/berlin green (BG), which may be explored for simultaneous sensing of cesium ions during adsorption dynamics.…”

“…Therefore, removing 137 Cs from contaminated water has become a research issue of growing significance [1,2]. Many adsorbent materials (e.g., clay minerals and metal oxides) have been evaluated in terms of their capability for removing 137 Cs from contaminated water [1][2][3][4][5][6][7][8][9][10][11]. Many of these conventional adsorbents are too expensive for use in large-scale applications or are too difficult to synthesize.…”

“…Prussian blue (PB), also called ferric hexacyanoferrate, is a zeolite-like inorganic material that exhibits a face-centered cubic lattice; PB substitutes its potassium ions for cesium ions due to the fact that it shows a high affinity for Cs in solution [3]. Accordingly, many reports on the use of PB and its analogs have demonstrated the removal of cesium ions [4][5][6][7][8][9][10][11]. These reports [4][5][6][7][8][9][10][11] confirmed the active role of PB in cesium adsorption; the removal efficiency of cesium is the function of parameters associated with the properties of PB and the additives that are used to prepare the adsorbent.…”