What other oxidizing reagents could have been used to convert the 9-fluorenol to 9-fluorenone?

That all depends upon what you used, doesn't it. What did you use? Perhaps I can suggest another one.

The one we used was sodium hypochlorite (NaOCl)

There are a large number of reagents that will carry out this oxidation.

Some examples are Jones reagent
http://en.wikipedia.org/wiki/Jones_oxidation

and PCC
http://en.wikipedia.org/wiki/Pyridinium_chlorochromate

To convert 9-fluorenol to 9-fluorenone, you need an oxidizing reagent. There are several oxidizing reagents commonly used in organic synthesis that can achieve this conversion. Here are a few examples:

1. Chromic Acid (CrO3): Dissolve 9-fluorenol in a suitable solvent, such as dichloromethane. Then, add chromic acid to the reaction mixture, which will oxidize the alcohol group of 9-fluorenol to a ketone, resulting in the formation of 9-fluorenone.

2. Jones Reagent (CrO3 in dilute sulfuric acid): Similar to chromic acid, the Jones reagent consists of chromic acid in dilute sulfuric acid. This reagent can also be used to convert 9-fluorenol to 9-fluorenone under suitable conditions.

3. Pyridinium Chlorochromate (PCC): Dissolve 9-fluorenol in a solvent like dichloromethane or methylene chloride. Add pyridinium chlorochromate to the reaction mixture, which acts as an oxidizing agent to convert the alcohol group of 9-fluorenol to a ketone, yielding 9-fluorenone.

It's essential to note that the choice of oxidizing reagent may depend on the reaction conditions, the desired yield, and other factors specific to the synthetic route you are following. Always consult literature references or consult with a chemistry professional to determine the most appropriate reagents for your specific synthesis.