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| ¾ø¶Ô²úÇâÁ¿ÊDz»¿É±ÈµÄ. ÒòΪ²»Í¬µÄʵÑéËùÓõĹâÔ´, ´ß»¯¼ÁÓÃÁ¿µÈ²»Ò»¶¨Ïàͬ,ËùÒÔûÓпɱÈÐÔ. Ò»°ã±È½ÏµÄÊÇÔÚijһ²¨³¤ÏµÄÁ¿×ÓЧÂÊ. |
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cxqtitan: ½ð±Ò+1, лл·ÖÏí 2013-02-03 13:12:31
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cxqtitan: ½ð±Ò+1, лл·ÖÏí 2013-02-03 13:12:31
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Ref: Chem. Mater. 2008, 20, 35-54 Current record holders in therms of quantum efficiencies (QEs) are NiO-modified La/KTaO3 (QE = 56%, pure water, UV light), ZnS (QE = 90%, aqueous Na2S/Na2SO3, light with ¦Ë> 300 nm), and Cr/Rh-modified GaN/ZnO (QE = 2.5%, pure water, visible light). ÓÃQE×ö²Î¿¼£¬±È½ÏÆðÀ´²Å(Ŀǰ¹«ÈÏ Angew. Chem. Int. Ed. 2010, 49, 1536-1539)ÓÐÒâÒå¡£ËùÒÔ£¬ÄãËùνµÄ¡°²úÇ⡱ÊýÁ¿ÊÇÒ»¸ö²»¾ßÓÐʵ¼ÊÒâÒåµÄÊýÖµ¡£¹éÒ»»¯ºÜÖØÒª¡£¾ÍºÃ±ÈÄãµ¥µ¥ÌÖÂÛ¡°TON¡±µÄ¶àÉÙ£¬Ô¶²»Èç¡°TOF¡±À´µÃÓпɱȽÏÐÔ¡£ |
3Â¥2013-02-03 04:49:08
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cxqtitan: ½ð±Ò+1, лл·ÖÏí 2013-02-05 08:05:48
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cxqtitan: ½ð±Ò+1, лл·ÖÏí 2013-02-05 08:05:48
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Agreed with "doctorzyjunior" said. FYI, please check some references from Dr. Kudo's group, Dr. Domen's group and Dr. H. Teng's group (from National Cheng Kung University, Taiwan). I did some water splitting exp. using optimized Kudo's catalyst (NiO-NaTaO3:La). The max H2 evolution rate I observed is ~10mmol/hr.gcat (pure water, low pressure UV lamp 90% ouput at 254 nm). |
4Â¥2013-02-05 04:42:05
5Â¥2013-02-05 14:12:29
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X Chen et al, Science 2011, DOI: 10.1126/science.1200448 The full spectrum solar simulator was used as the excitation source, which produces about 1 sun power at the sample consisting of black TiO2 nanocrystals loaded with 0.6 wt% Pt, placed in a Pyrex glass container filled with 1:1 watermethanol solution. (methanol is the sacrificial reagent and the anodic reaction generating O2 from H2O is not occurring in this system). Measurements were conducted initially for 15 consecutive days; each day the sample was irradiated for 5 hours, and then stored in darkness overnight before testing the next day. We found that 1 hour of solar irradiation generated 0.2 ¡À 0.02 mmol of H2 using 0.02 grams of disorderengineered black TiO2 nanocrystals (10 mmol per hour per gram of photocatalysts) |
6Â¥2013-02-05 14:22:08
7Â¥2013-02-05 14:23:21
| We also measured photocatalytic H2 production using black TiO2 as the photocatalyst with only visible and infrared light by filtering out incident light with wavelengths shorter than about 400 nm. The rate of H2 production dropped to 0.1 mmol +/- 0.02 per hour per gram of photocatalysts, reflecting the activity of the extended tail or mid-gap states of the thin disordered layer that have a narrower band gap created by disordering. |
8Â¥2013-02-05 14:25:58
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