Economical production of ZnO / Ag nanoparticles for anti-algae use

In a study published in the journal Materials Today Communications, a novel technique for synthesizing ZnO / Ag for use in photocatalytic and anti-algae applications is discussed.

Study: Rapid, continuous and large-scale synthesis of hybrid ZnO / Ag nanoparticles via a one-step incident flow pathway for efficient photocatalytic and anti-algae applications. Image Credit: Chokniti Khongchum /

Drinking contaminated water, especially dye sewage pollution, presents potential dangers to human health and has the ability to stifle economic development.

The rapid, cost-effective and large-scale synthesis of ZnO / Ag nanoparticles with excellent characteristics remains a difficult job, especially when it comes to maintaining high Ag removal efficiency throughout the system. production. In addition, the overproduction of many microalgae in ocean waters has caused severe damage to the natural marine environment as well as enormous economic losses.

A good example of these microalgae is Costatum skeleton (S. costatum), one of the most common marine diatoms. The presence of episodes of marine algae blooms can have a negative impact on the profitability of desalination plants. Many organizations are now dedicated to studying effective ways to prevent the spread of S. costatum.

Why ZnO / Ag?

Several nanoparticles have been discovered in recent years to have properties that could solve environmental and marine fouling problems.

Ag is less expensive than Au, Pt, and Pd, making Ag / ZnO one of the most preferred options for improving photocatalytic and anti-algae characteristics. To date, many techniques for making such types of nanomaterials in one or two steps have been published, including the wet chemical approach, the simple hydrothermal method, the microwave technique, and the photoreduction approach.

Two-step procedures are unsuitable for industrialization due to their laborious processes, strict experimental conditions, and low efficiency. Low Ag removal efficiency, low yield, long and excessive Ag contents inside the material make cost reduction and industrialization of one-step processes problematic.

Therefore, it is essential to create a simple, fast and cost effective major fabrication production technique to produce high performance ZnO / Ag nanoparticles.

Importance of the Ag report

The proportion of Ag of these nanoparticles is important for the photochemical and anti-algae properties of the materials. According to previous data, to ensure the Ag saturation of goods, the amount of silver nitrate in natural resources is usually excessive, which greatly increases the cost of manufacture.

One of the most important variables to obtain ZnO and silver nanoparticles with greater silver concentration is the choice of the right reducing agent.

ZnO / Ag synthesis process

In this study, a photocatalyst composed of hybrid ZnO and silver nanomaterials was created using a simple, fast and large one-step incident flux approach that can produce an extremely engaged nanodomain with high speed and shear force. .

Due to the enlarged contact region and the evenness of mixing, the solution will be greatly improved, resulting in the rapid crystal growth of homogeneous and small hybrid nanoparticles of ZnO and silver. Potential reaction procedures were examined based on extensive experimental and characterization results.

This study presented a viable and efficient technique for producing nanomaterials with outstanding performance on an ongoing basis.

Using a one-step intrusive diffusion technique based on a circular flow of consciousness microreactor, the ideal reducer NaHB4 was used to synthesize hybrid ZnO and silver nanomaterials with high silver removal efficiency of 96.87%.

The infringement flow path causes the two-phase solution to have a very high comparative velocity and strong shear force in the injury site, increasing the interfacial interaction and mixing the homogeneity of the solvent of multiple raw materials. , resulting in faster crystallization and rapid development of homogeneity and tiny nanoparticles.

The prepared ZnO and silver nanocomposites demonstrated excellent photocatalytic activity as well as anti-algae properties. Under ultraviolet (UV) irradiation for 15 minutes, 18 minutes and 12 minutes, respectively, the anti-algae ZnO / Ag effectively suppressed the growth of S. costatum.

A feasible method of photocatalyst and anti-algae action has been proposed based on the categorization and empirical results. Due to their supreme properties, the compounds synthesized are potential candidates for use as photocatalysts and anti-algae agents in a variety of fields.

Continue Reading: Using Single Cell ICP-MS to Measure Increase in Nanoparticles and Ion / Dissolved Gold by Freshwater Algae.


Wang, X., Wang, X., Meng, A., Li, Z. and JingXing. (2022). Rapid, continuous and large-scale synthesis of hybrid ZnO / Ag nanoparticles via a one-step incident flow pathway for efficient photocatalytic and anti-algae applications. Today’s Materials Communications, 30. Available at:

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