Hollow-fiber membranes for photosensitized electron transport
Commercially available cellulose acetate hollow fiber membranes have been investigated for possible use in artificial photosynthesis solar energy schemes. The function of the membrane is to contain the photosensitizer and to separate the oxidized and reduced species which result from photosensitized electron transfer reactions on each side of the membrane wall. Membranes were successfully modified by a process of soaking in a THF solution saturated with porphyrin, followed by a water rinse. This procedure gives dark purple fibers which contain up to 30 mM zinc tetraphenylporphyrin in the fiber walls. A plumbing system has been developed to allow flow of a solution through the inner channels of a 24-fiber bundle while it is immersed in a separate outer solution. Preliminary studies indicate that the fibers are somewhat permeable to both EDTA and dimethyl viologen, the electron donor and acceptor molecules, respectively. Preliminary photochemical studies on cut-up pieces of the treated fiber indicate that it does photosensitize a reaction between EDTA and dimethyl viologen in aqueous solution.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6601907
- Report Number(s):
- LBL-12359
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
AMINO ACIDS
AQUEOUS SOLUTIONS
BIOMIMETIC PROCESSES
CARBOHYDRATES
CARBOXYLIC ACIDS
CELLULOSE
CHELATING AGENTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMISTRY
DISPERSIONS
EDTA
ELECTRON TRANSFER
FABRICATION
FIBERS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
MEMBRANE TRANSPORT
MEMBRANES
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PERMEABILITY
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
PHOTOSYNTHESIS
POLYSACCHARIDES
PORPHYRINS
REAGENTS
SACCHARIDES
SENSITIZERS
SOLUTIONS
SYNTHESIS