Introduction

In this experiment, we will find luminescent silole nanoparticles for chromium (VI) detection to determine the best luminescent silole nanoparticles solution for detecting chromium (VI) in water.

Aim

To find the best luminescent silole nanoparticles for chromium (VI) detection.

Theory

1. We are performing this experiment because there should be no more than 0.1 ppm of chromium in water, according to the U.S. Environmental Protection Agency.

2. To detect how much chromium is present in water, we needed to build an effective device. Ut thanks to the Trogler group, which determined that the nanoparticles of silole can determine the amount through luminescence quenching.

4. The process that refers to the decrease of fluorescence intensity of a substance with time is called Quenching.

Chromium Water

Requirements

1. Silole Solution

2. Chromium

3. Light Source

4. Notebook

5. Pen

Procedure

Step 1: In this experiment, we will test three variables to find the solution to measure the chromium concentration in water. These three variables are silole concentration, water percentage in solution, and pH level.

Step 2: From each solution, find the almost luminescent solution.

Step 3: The chosen one will be used for chromium quenching.

Step 4: Add chromium to each solution with time.

Step 5: Find the luminesce spectra for each of the solutions each time after the addition of chromium.

Step 6: This will determine the effect of chromium on the solution’s luminous intensity.

Step 7: Record your observations.

Step 8: Now, determine the effect of light on the solution with time by keeping the solution in the dark or in the light at which it will remain stable.

Observation

1. In the experiment, we observed that luminous intensity increases with increasing water.

2. When we increased the silole solution, fluorescein also increased. And it also increased when pH was non-neutral.

3. The three samples in the experiment had clearer efficiency than the others.

4. The three were 4mg per litre silole concentration in 95% water, 6mg per litre silole concentration in 95% water, and the last one was 6mg per litre silole concentration in 90% water. These all detected chromium at a higher efficiency rate.

Result

1. The three solutions that were most efficient in detecting the presence of chromium in water were 4mg per litre silole concentration in 95% water, 6mg per litre silole concentration in 95% water, and 6mg per litre silole concentration in 90% water.

2. This is because they were quenched by the chromium in the solution most efficiently. And not because of being the most luminescent of all.

Precaution

1. Add chromium in silole solution at a fixed interval.

2. Record your observation carefully.

Conclusion

In this experiment, using a silole solution, we detected the presence of chromium in water by calculating its quenching effect on luminescence.

VIVA Questions With Answers

Q.1 What was the aim of your experiment?

ANS. We aimed to find the best luminescent silole nanoparticles for chromium (VI) detection.

Q.2 Which solution was best for the detection of chromium in water?

ANS. We obtained three solutions that can be best for detecting chromium in water. These were 6mg per liter silole concentration in 95% water, 4mg per liter silole concentration in 95% water, and 6mg per liter silole concentration in 90% water.

Saquib Siddiqui

Saquib Siddiqui is a Mechanical Engineer and a content creator. He has special interest in science experiments and teaches the same to school and college students. He is also a technical lead at RUDE LABS PVT. LTD.