Dear friend Pitchayapa Boonsuk

Let us discuss general methods for synthesizing soluble TiO2 nanoparticles using a sol-gel approach at room temperature.

To synthesize soluble TiO2 nanoparticles via sol-gel at room temperature, you might want to consider the following steps:

1. **Materials Needed:**

- Titanium precursor (such as titanium isopropoxide or titanium tetrachloride)

- Solvent (typically alcohol or water)

- Surfactant or stabilizing agent

- Acid or base catalyst

- Ligands (if required)

2. **Procedure:**

a. **Preparation of Titanium Precursor Solution:**

- Mix the titanium precursor with the solvent. The choice of solvent will depend on your specific requirements.

b. **Addition of Stabilizing Agent:**

- Introduce a surfactant or stabilizing agent to control particle size and prevent agglomeration.

c. **Catalysis:**

- Add a catalyst, typically an acid or base, to initiate the sol-gel reaction.

d. **Reaction at Room Temperature:**

- Allow the reaction to proceed at room temperature. The sol-gel process involves hydrolysis and condensation reactions that form a gel.

e. **Washing and Drying:**

- Wash and dry the gel to obtain TiO2 nanoparticles.

3. **Characterization:**

- Characterize the synthesized TiO2 nanoparticles using techniques like X-ray diffraction (XRD), transmission electron microscopy (TEM), or dynamic light scattering (DLS) to analyze their structure, size, and distribution.

some of my published papers on nano-particle synthesis and chanraterization can be of your interest:

Preprint Hierarchical NiMn Double Layered/Graphene with Excellent Ene...

Chapter Synthesis Of Manganese Oxide Nanoparticles Using Similar Pro...

The precursor solution was a mixture of a 1:3(v/v) ratio of TTIP and IP experimentally. 250 ml solution of distilled water with conditioning pH (2.0) was used as the hydrolysis promoter. The stoichiometry pH value of the solution was controlled by adding HCl solution. The gel preparation process started when the two solutions were mixed under vigorous stirring. Hydrolysis of TTIP gave a turbid solution until heated at 62-63°C for almost 12–14 hours (peptization). After the peptization process, the volume of the solution decreased to 50cm3and the white suspension with high viscosity. The prepared precipitates were washed with ethanol and dried at 45◦C in a vacuum oven a white powder was obtained.

Article Low-temperature synthesis and crystal growth behavior of nan...

What are you going to use as titanium source and what form and size of TIO2 will you prepare?