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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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yanhj0

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¡ï ¡ï
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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
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

doctorzyjunior

Í­³æ (СÓÐÃûÆø)


¡ï ¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
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)


¡ï ¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
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
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

polyoxometalate

Òø³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
4Â¥: Originally posted by liuyinallen at 2013-02-05 04:42:05
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 s ...

10mmol/hr.gcatÊÇ×î´óÂð£¿
5Â¥2013-02-05 14:12:29
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

polyoxometalate

Òø³æ (ÖøÃûдÊÖ)


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
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

polyoxometalate

Òø³æ (ÖøÃûдÊÖ)


The energy conversion efficiency for solar hydrogen production, defined as the ratio between the energy of solar-produced hydrogen and the energy of the incident sunlight, reaches 24% for disorderengineered black TiO2 nanocrystals.
7Â¥2013-02-05 14:23:21
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

polyoxometalate

Òø³æ (ÖøÃûдÊÖ)


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
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Jefferypan

½ð³æ (СÓÐÃûÆø)


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polyoxometalate: ½ð±Ò+10, ¸Ðл²ÎÓëÌÖÂÛ£¡ 2013-02-14 09:20:58
ÎÒÀ´´Õ´ÕÈÈÄÖ£¬¸ú×ÅÌÖÂÛÌÖÂÛ¡£ËµËµÎÒ¸öÈ˵Ŀ´·¨¡£
per gram˵°×Á˽²ÊÇÀµÆ¤µÄ˵·¨£¬ÄÃ20mgÑùÆ·×ö²âÊÔ£¬È»ºó½á¹û³ËÒÔ50±¶£¿£¡Ò»£¬´ÓÎÒ¿´µ½µÄÎÄÏ׺ͷÃÎʹýµÄС×鶼ûÓÐÈËÄÃ1g²âÊԵģ¬Ð§¹û¿Ï¶¨²»ºÃ£»¶þ£¬20mgÊÇÕâ¸öЧÂÊ£¬1gºÜÓпÉÄÜÒ²¾ÍÁ½±¶Èý±¶µÄ²úÁ¿¡£
Èç¹û¿ÉÒÔÕâÑù¼ÆËãµÄ»°£¬ÎÒµÄÒ»¸öʦÐÖÓÐÒ»¸ö¹¤×÷ÊÇZnO-CdSÒìÖʽṹ²úÇ⣺100 mg sample; 300 W Xe lamp; 300 mL aqueous solution containing 0.1 m Na2S and 0.1 m Na2SO3.×î¸ß²úÁ¿ÊÇ1.92mmolÿСʱ¡£¼ÆËãÆðÀ´¾ÍÊÇ19.2mmolH2/hour¡££¨DOI: 10.1002/aenm.201100528£©

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9Â¥2013-02-13 20:18:55
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