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polyoxometalate

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[½»Á÷] ÇëÎÊÒѱ¨µÀµÄ¹â´ß»¯²úÇâ×î¶àÊǶàÉÙ£¿10 mmol per hour per gram of photocatalysts

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[ Last edited by pzypdl on 2013-2-19 at 22:24 ]
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polyoxometalate

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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
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yanhj0

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pzypdl: ½ð±Ò+1, лл»ØÌû½»Á÷£¡ 2013-02-01 19:56:37
¾ø¶Ô²úÇâÁ¿ÊDz»¿É±ÈµÄ. ÒòΪ²»Í¬µÄʵÑéËùÓõĹâÔ´, ´ß»¯¼ÁÓÃÁ¿µÈ²»Ò»¶¨Ïàͬ,ËùÒÔûÓпɱÈÐÔ. Ò»°ã±È½ÏµÄÊÇÔÚijһ²¨³¤ÏµÄÁ¿×ÓЧÂÊ.
2Â¥2013-02-01 19:46:07
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doctorzyjunior

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cxqtitan: ½ð±Ò+1, лл·ÖÏí 2013-02-03 13:12:31
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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liuyinallen

Òø³æ (СÓÐÃûÆø)


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cxqtitan: ½ð±Ò+1, лл·ÖÏí 2013-02-05 08:05:48
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
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