Plenty. What are you looking for specifically? A simple chant? A charm? Or a full spell with a bunch of items and steps?
Personally I take my pentacle necklace, charge it with energy, and visualize a silver glow around it. Then a say a chant and leave it on my altar for a blessing.
You could also try daily shielding to keep negative energy away.
Protection and Reversal spells by Jason Miller is an excellent beginner manual for exactly this topic..Every Magician needs at least one book on this subject on the Shelf
Millers offers an easy workable system for beginners and advanced
There are thousands, endless amount of spells for protection. I personally do not use protection spells as it is easier to just carry around protection crystals, and keep them around my house.
General Protection: (Just a few)
Agate, Amber, Aventurine, Black Agate, Black Kyanite, Black Obsidian, Calcite, Carnelian, Citrine, Emerald, Flourite, Fire Agate, Gold, Hematite, Honey Calcite, Jasper, Labradorite, Lapis Lazuli, Malachite, Moonstone, Pyrite, Clear Quartz, Selenite, Black Tourmaline, Smokey Quartz.
Protection from Evil:
Beryl, Blue Chalcedony, Malachite, Pyrite, Quartz, Black Tourmaline, Snowflake Obsidian, Turquoise
Protection from Negativity:
Black Kyanite, Black Obsidian, Celestite, Citrine, Kunzite, Katanganite, Peacock Ore Quartz, Black tourymaline (Again!), Smoky Quartz
Usually Dark or Black Crystals aid in Protection and ridding negative energy from your home, yourself, and the atmosphere surrounding you, carry some of these stones around you in your pocket or place some around your home for protection. I hope this helps.
There are many different spells and ways to protect. The best choice depends on what you are wanting to protect and the type of protection. The spell and herbs I use to protect my home is much different then what I use for my personal vehicle.
Also what I use for personal protection depending on the day is an amulet charged at least weekly and 3 stones usually jet, labrodite, and soladite. For my home I use a blue sage smudging stick and smuge my home as well as a combination of herbs with sea salt being the main ingredient as well as some other herbs. My alter is protect in a different way.
But when I do any protection I am very very specific that I am only protecting from negativity. I am very specific about what I am protecting.
There are some basic cover all your bases protection spells. But I find being very specific about the protection and writing my own seems to work much better.