±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 890  |  »Ø¸´: 1

w_dd

гæ (³õÈëÎÄ̳)

[ÇóÖú] ÓÃ×ÏÍâ¿É¼û¹âÆ×ÒDzâenergy gap

ÎÊÌâÊÇÓÃÓ¢Îıí´ïµÄ£¬Çë¸÷λ´óÉñ²»Òª½éÒâ£¬ÕæÐÄÇó½Ì£¬·Ç³£¸Ðл£¡
We know that UV-Vis spectra can be used to estimate the optical band gap for the analyte.
The figure in the attachment shows one example of uv-vis spectrum obtained, a peak at around 275 nm is obtained, below are the questions:
1. why the cut-off at higher wavelength is used for the calculation of energy gap? it underestimates or overestimates the energy gap?
2. why not use the wavelength at the peak maximum (275 nm) for the calculation of energy gap?
3. why the absorption increases when the wavelength goes lower to 200 nm?
Èç¹û¶ÔÎÒµÄÎÊÌâÓÐÈκÎÒÉÎÊ»òÕßÌÖÂÛ£¬ËæÊ±»¶Ó­£¬Ð»Ð»£¡
PS£ºÃ»¶àÉÙ½ð±Ò£¬Èç¹ûÄÜÄÍÐĸøÎÒ½â»ó£¬ÄÇÎҾͰÑËùÊ£²»¶àµÄ¼Òµ±¶¼¸øÄãÁ˰É^_^

ÓÃ×ÏÍâ¿É¼û¹âÆ×ÒDzâenergy gap
uv-vis.PNG
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

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

w_dd

гæ (³õÈëÎÄ̳)

¶¼Ã»ÓÐÈ˵Äô£¿
2Â¥2016-03-13 14:07:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ w_dd µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 0856²ÄÁÏ»¯¹¤µ÷¼Á ×Ü·Ö330 +14 zhubinhao 2026-03-27 14/700 2026-03-29 10:01 by Sjndkwm
[¿¼ÑÐ] Ò»Ö¾Ô¸»ª¶«Ê¦·¶´óѧÓлú»¯Ñ§×¨Òµ£¬³õÊÔ351·Ö£¬¸´ÊÔ±»Ë¢Çóµ÷¼Á! +3 ÕæÃûÓбù 2026-03-29 4/200 2026-03-29 08:47 by qingfeng258
[¿¼ÑÐ] Ò»Ö¾Ô¸211 ³õÊÔ270·Ö Çóµ÷¼Á +8 ¹ÈÓêÉϰ¶ 2026-03-23 9/450 2026-03-29 01:00 by ÎÒÊÇС¿µ
[¿¼ÑÐ] 085600£¬²ÄÁÏÓ뻯¹¤321·ÖÇóµ÷¼Á +9 ´ó²öС×Ó 2026-03-28 9/450 2026-03-28 14:56 by ÉñÂí¶¼²»¶®
[¿¼ÑÐ] µ÷¼Á +3 ºÃºÃ¶ÁÊé¡£ 2026-03-28 3/150 2026-03-28 12:04 by Íõ±£½Ü33
[¿¼ÑÐ] 311Çóµ÷¼Á +3 Ï£ÍûÉϰ¶°¢Ð¡Ñî 2026-03-23 3/150 2026-03-28 07:57 by ÈÈÇéɳĮ
[Óлú½»Á÷] ¸ßθßѹ·´Ó¦ÇóÖú 10+4 chibby 2026-03-25 4/200 2026-03-27 21:08 by BT20230424
[¿¼ÑÐ] 283Çóµ÷¼Á£¨080500£© +4 A child 2026-03-27 4/200 2026-03-27 15:34 by XPUÀîÇì
[¿¼ÑÐ] 085600£¬²ÄÁÏÓ뻯¹¤321·Öµ÷¼Á +4 ´ó²öС×Ó 2026-03-27 6/300 2026-03-27 14:11 by ËÉ»¨¸×1201
[¿¼ÑÐ] 316Çóµ÷¼Á +5 Pigcasso 2026-03-24 5/250 2026-03-27 12:10 by zhshch
[¿¼ÑÐ] Ò»Ö¾Ô¸211£¬335·Ö£¬0856£¬Çóµ÷¼ÁԺУºÍµ¼Ê¦ +4 Çã____Ïô 2026-03-27 5/250 2026-03-27 11:52 by zhshch
[¿¼ÑÐ] Çóµ÷¼Á Ò»Ö¾Ô¸ ±¾¿Æ ±±¿Æ´ó »¯Ñ§ 343 +6 13831862839 2026-03-24 7/350 2026-03-26 22:57 by ²»³Ôô~µÄ؈
[¿¼ÑÐ] 290·Öµ÷¼ÁÇóÖú +3 ¼ªÏéÖ¹Ö¹³Â 2026-03-25 3/150 2026-03-25 19:58 by barlinike
[¿¼ÑÐ] ¿¼ÑÐÒ»Ö¾Ô¸ËÕÖÝ´óѧ³õʼ315£¨Ó¢Ò»£©Çóµ÷¼Á +3 sbdksD 2026-03-24 4/200 2026-03-25 18:16 by xcjcqu
[¿¼ÑÐ] ÉúÎïѧѧ˶Çóµ÷¼Á +7 СÑò˯×ÅÁË? 2026-03-23 10/500 2026-03-25 02:24 by Çå·ç·÷Ñï¡£ m
[¿¼ÑÐ] ²ÄÁÏר˶ÕÒµ÷¼Á +5 ¹þ¹þ¹þºðºðºð¹þ 2026-03-23 5/250 2026-03-24 19:07 by ÁËÁËÁËÁË¡£¡£
[¿¼ÑÐ] 292Çóµ÷¼Á +4 ¶ì¶ì¶ì¶î¶î¶î¶î¶ 2026-03-24 4/200 2026-03-24 16:41 by peike
[¿¼²©] 26É격×Ô¼ö +3 whh869393 2026-03-24 3/150 2026-03-24 09:55 by 21018060
[¿¼ÑÐ] 269Çóµ÷¼Á +4 ÎÒÏë¶ÁÑÐ11 2026-03-23 4/200 2026-03-23 21:25 by pswait
[¿¼ÑÐ] ʯºÓ×Ó´óѧ£¨211¡¢Ë«Ò»Á÷£©Ë¶²©Ñо¿Éú³¤ÆÚÕÐÉú¹«¸æ +3 Àî×ÓÄ¿ 2026-03-22 3/150 2026-03-22 21:01 by ÔõôÊÍ»³
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û