Hello, 

Try below code with your button:  2 ways you can do this: 

Using Javascript : 
 

<script src="//ajax.googleapis.com/ajax/libs/jquery/latest/jquery.js"></script>
<script>

    function buttonsEnabled(enabled) {
        // retrieve all of the buttons or links on the page
        // with the css class of btn
        var $buttons = jQuery('.btn');
        if (enabled === false) {
            // add the btnDisabled class to give it the look of being disabled
            // add the disabled attribute to actually disable interactability
            $buttons.toggleClass('btnDisabled', true).attr('disabled', 'disabled');
        } else {
            // remove the css class and the disabled attribute
            $buttons.toggleClass('btnDisabled', false).attr('disabled', null);
        }
    }

    function doSomeWork() {
        // first, call the action function to post the form
        doSomeWorkActionFunction();

        // second, disable the buttons
        buttonsEnabled(false);

        // third, return false to prevent the click from
        // posting the form a second time
        return false;
    }

</script>
<apex: page>
<apex:form>

    <apex:actionFunction name="doSomeWorkActionFunction"
        action="{!yourControllerMethod}"
        oncomplete="buttonsEnabled(true);"
        rerender="whateverYouNeedToRerender"></apex:actionFunction>

    <apex:commandLink action="{!yourControllerMethod}"
        value="Your Text Here"
        id="theCommandLink"
        onclick="return doSomeWork();" />

</apex:form>
<apex:page>

Using Controller: 

Class sample code: 
 

public Boolean spehereEnabled = false;    

public void enableSpehere()
  {
    spehereEnabled = true;
  }

Button in VF page: 
 

<apex:commandButton disabled="{!spehereEnabled}" value="{!enableSpehere}" value="Enable Spehere" />

Note that you had both your method named enableSpehere and also your Boolean property. I changed the Boolean property name for you to spehereEnabled. You'd just change the pageBlockSection rendered binding to...

<apex:pageBlockSection rendered="{!sphereEnabled}"\>

Hope this will help you. 

Thanks
karthik