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bucthj

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Õâ¶Îʱ¼äÒ»Ö±ÔÚÕÒsemiconductorµÄÎÄÏ×
51Â¥2011-09-14 08:42:20
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gongt08

½û³æ (³õÈëÎÄ̳)

±¾ÌûÄÚÈݱ»ÆÁ±Î

75Â¥2011-09-24 10:56:30
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starmetis

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¡ï¡ï¡ï¡ï¡ï ÎåÐǼ¶,ÓÅÐãÍÆ¼ö

The conclusion will be helpful
Graphene-based     semiconductor     photocatalysts     have
attracted extensive attention for their potential in environmental
and energy-related applications. Although considerable progress
has been achieved, the studies in this field are at the primary stage
and  further  developments  are required.  First,  as  an  essential
component of the composites, the synthesis of graphene is not yet
matured and the quality-control issues need to be addressed.
New  synthesis  methods  have  to  be  developed  for  preparing
high-quality graphene or graphene oxide sheets with high purity,
tunable sizes of layers, compositions and defects. Second, the
performance  of  graphene-based  semiconductor  composites  is
limited   by   the   quantity   of   these   composites   and   their
microstructures.   Therefore,   a   more  careful   design   of  the
functional composites is required to obtain higher quality, more
uniform morphology on the nanoscale and better photocatalytic
properties. Third, the rapid development of material science and
technique in the past few years has resulted in the creation of
various advanced photocatalytic materials. Interesting properties
may  be  explored  by  combining  these  novel  photocatalysts
with graphene or graphene oxide sheets. Finally, the mechanisms
of    photocatalytic    enhancement    by    the    graphene-based
semiconductor  composite  systems  are  partly  unclear.  For
example, whether the photocatalytic activity of TiO2¨Cgraphene
composites  is  truly  different  from  other  TiO2¨CC  (activated
carbon, fullerenes, or carbon nanotubes) composite materials.
Furthermore, the explanation of photocatalytic activity by the
graphene  content  in  the  composites  is  still  controversial.
Therefore,  more  studies  are  needed  to  improve  the  general
understanding of the enhancement mechanism of photocatalysts
by   graphene.   Nevertheless,   graphene-based   semiconductor
composite photocatalysts are expected to be developed as robust
materials to address various environmental and energy-related
issues.
82Â¥2011-10-07 14:03:16
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a88592718

Ìú¸Ëľ³æ (ÕýʽдÊÖ)


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90Â¥2011-10-23 19:22:57
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С³Ø×Ó»µ»µ

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