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Carbon Nanotube Photochemistry and Functionalization

Nanomaterial hazard analysis In this process carbon nanotubes (CNT) are suspended in a water or solvent. This material is put into closed reaction vessels where it is exposed to gases and ultraviolet light. There may be chemical changes that increase the solubility of the CNT. A number of studies by other research groups at Rice indicate that increasing the water solubility of CNT may make them less hazardous needed.

Nanomaterial exposure assessment Spillage of suspended CNT and functionalized CNT could cause exposure to the skin.

Nanomaterial exposure control Skin contact does not appear to be a route for uptake into the body, and standard laboratory hygiene practices should be adequate here. Use gloves when handling and transferring the material. Good chemical hygiene as spelled out in the Rice University Chemistry Department’s Chemical Hygiene Manual will be maintained. If the suspension is accidentally spilled, this should be promptly be cleaned up by wet wipe. New students and staff will be trained by experienced staff in the specific procedures of the laboratory after they receive general training from the University EH&S. University Facilities, Engineering and Planning will routinely inspect fume hoods, and certify proper operation. Use of conventional vacuum cleaners is prohibited as this may resuspend CNT particles. Waste material is labeled for content, and is removed by the University chemical waste disposal service.

Hazard class B, Potential release by spillage, short term exposure, control band 2

New information from the literature as to hazards of CNT will be discussed to determine if procedures need to be modified to reduce risk of exposure. Such changes will be incorporated into the protocol and training. ta The University EHS and/or the Chemistry Department maintains records on employee training and overall safety procedures.