Dye functionalized carbon nanotubes for photoelectrochemical water splitting - role of inner tubes.
Hits:
Release time:2022-02-22 Impact Factor:12.7 DOI number:10.1039/c6ta00143b Journal:Journal of Materials Chemistry A Abstract:Dye sensitized water splitting photoelectrochemical (PEC) cells generally require the attachment of photosensitizer to a semiconductor and a water oxidation catalyst (WOC). Here we report for the first time that dye, including zinc phthalocyanine (ZnPc), cobalt phthalocyanine (CoPc) and tris(bipyridine)ruthenium(II) (Rubpy), sensitized or functionalized pristine carbon nanotubes (dye/CNTs) without the presence of semiconducting oxides and conventional WOCs have unusually high activity for PEC water splitting in alkaline solutions under ultraviolet (UV) and visible light. The PEC activities of dye/CNTs show distinctive volcano curves as a function of number of walls with the highest activity observed on double- and triplewalled CNTs (DWNTs and TWNTs). For example, the photocurrent of the ZnPc functionalized TWNTs at 1.2 V vs. RHEis0.32mAcm2,which is 4 times of 0.09 mA cm2 obtained on the ZnPc functionalized single-walled CNTs (SWNTs) and one order of magnitude higher than 0.02 mA cm2
on ZnPc functionalized multi-walled CNTs (MWNTs). On the other hand, the photocurrents are negligible on pristine CNTs, less than 0.005 mA cm2 under identical experimental conditions. This remarkable feature is due to the unique charge separation ability of the dye/CNTs, where the photoexcited electrons are transferred to the inner tubes via the electron tunneling under the dc bias voltage, and the significant electrocatalytic activities of DWNTs and TWNTs for the water oxidation reaction. The results provide new opportunities for the development of artificial photosynthetic systems via the manipulation of the quantum properties of CNTs. Indexed by:Journal paper Volume:4 Page Number:2473-2483 Translation or Not:no Date of Publication:2016-01-22 -
|
 Zip Code:c576f0c85848a14d10428d1b79269fc7d68bde9ba6ecb95648b168a03671c3821c778c2bedf0cae5d03c95a065c3a5efa4243241acb9eb6089885db6f9f3fa7f5b7491eb5af48e7ab43d253e29e0fa6991b0af260ac98903cc7fbca150cb2fc86cb6bd41d95f78a263ba3d6f6aa504ee56cdd8693f2e6f13b576940cee3633de Postal Address:2d76dd1b17f33191b32a8fb01e602e3a9acc24ab9ff8633bceaface2762fdf181099b74d21933a6b764ecf3f963bf0111f60dfb22b6a44c504ca295b895239e264a94da7439d24fe600be5675931c404a7b735c1028445b959bd3b7906fdab9cd6a3531f2cf3d03b7276b5ae31d12846d462153436175090446fb56b7922d348 Mobile:5ac9ff840716286a408af95d091cedf09aad1cf580be50cdfe5c4db7baffdfceddb90f7f1624d06087bb44702017e2a49b05916cebbd167ad87b5d0bd36aaa9ebd44ecc7816ddd383eaaed06bb3889fc5b2fdfbd352a3ba6e86d9caf19ac8dfb3d15f9386a70bd1d092d30e86952c0892723ea77c8aae902cea44e51d0091e9e Email:192cb9a8a91b58fc4c9bc6ad8f2353bc803e22fa587a2b1343f7dee49bd2510c0d577f74ba2fa8ca027034c7f2b9b1faaddde9274b54ebf74855e004c8a22723ece4300d9a73c2b23e8b7cb40c2a6ea69afb3a104e2d674b244aca7ce76c3a5403200528ccd468969853f54068bfd849177fc3b16d879b5d65c6f317b1f638f9
|
MOBILE Version
