東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Fabrication of Particulates for Detecting Trace Level Analytes in Water Using Optical Spectroscopy and for Developing Thermoelectric Materials.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Fabrication of Particulates for Detecting Trace Level Analytes in Water Using Optical Spectroscopy and for Developing Thermoelectric Materials./
作者:	Ibnul, Mohammed Nayeem.
面頁冊數:	1 online resource (218 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
Contained By:	Dissertations Abstracts International84-04B.
標題:	Membranes. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29385980click for full text (PQDT)
ISBN:	9798352643853

Fabrication of Particulates for Detecting Trace Level Analytes in Water Using Optical Spectroscopy and for Developing Thermoelectric Materials.
Ibnul, Mohammed Nayeem.

Fabrication of Particulates for Detecting Trace Level Analytes in Water Using Optical Spectroscopy and for Developing Thermoelectric Materials. - 1 online resource (218 pages)

Source: Dissertations Abstracts International, Volume: 84-04, Section: B.

Thesis (Ph.D.)--The University of Maine, 2022.

Includes bibliographical references

The underlying concepts developed in this thesis involve particulate fabrication of known size using a bottom-up synthesis or a top-down milling process. This bottom-up approach was used for detection of analytes in water. Conventional UV-Vis spectroscopic based detection methods require target analytes to be soluble or have enough vapor pressure for analysis in the gas phase. We achieved an order in magnitude improvement in the detection limit over the standard molybdenum blue method for phosphate and arsenate by conversion of target analytes present in solution to a solid for quantification by UV-Vis and IR spectroscopy. Furthermore, by recording a visible and infrared spectrum on the same membrane, we were able to selectively determine both phosphate and arsenate. This is not possible using the standard molybdenum blue method.We also developed generalized approach involved the precipitation of polyatomic anions with simple monoatomic cations. We demonstrated this concept with the detection of free and weak acid dissociative (WAD) cyanide in water. In our method, cyanide ions are precipitated with silver ions and then captured on an IR transparent membrane. Key to our approach was the use of an 13CN spiked addition to achieve detection limits below the 0.2 mgL-1 level. Furthermore, we were able to distinguish between free and WAD cyanide by using a spiked addition of sodium sulfide. The sulfide freed the cyanide from the WAD compounds enabling detection of this fraction of cyanide by our method.Using a tops-down approach we generated bismuth telluride nanoparticles for thermoelectric power generation. The "as received" bismuth telluride ingots were ball milled in the presence of the cationic polymer PADAMAc which prevented particle aggregation during the milling process. By adjusting the milling conditions, we were able to control the particle size of the particulate to a small as 40 nm in diameter. Sintering pellets of the particulates below the melting point resulted in voids that scattered the thermal radiation. As a result, we show that adjusting particle size and sintering temperature could be viable strategies for developing TE material.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352643853Subjects--Topical Terms:

1531702
Membranes.
Index Terms--Genre/Form:

542853
Electronic books.

Fabrication of Particulates for Detecting Trace Level Analytes in Water Using Optical Spectroscopy and for Developing Thermoelectric Materials.
LDR:03580nmm a2200361K 4500 001 2363366
005 20231121104623.5
006 m o d
007 cr mn ---uuuuu
008 241011s2022 xx obm 000 0 eng d
020 $a 9798352643853
035 $a (MiAaPQ)AAI29385980
035 $a (MiAaPQ)U_Maine4663
035 $a AAI29385980
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Ibnul, Mohammed Nayeem. $3 3704124
245 1 0 $a Fabrication of Particulates for Detecting Trace Level Analytes in Water Using Optical Spectroscopy and for Developing Thermoelectric Materials.
264 0 $c 2022
300 $a 1 online resource (218 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
500 $a Advisor: Tripp, Carl P. ;Bruce, Alice;Gramlich, William;Bousfield, Douglas;Wells, Mark.
502 $a Thesis (Ph.D.)--The University of Maine, 2022.
504 $a Includes bibliographical references
520 $a The underlying concepts developed in this thesis involve particulate fabrication of known size using a bottom-up synthesis or a top-down milling process. This bottom-up approach was used for detection of analytes in water. Conventional UV-Vis spectroscopic based detection methods require target analytes to be soluble or have enough vapor pressure for analysis in the gas phase. We achieved an order in magnitude improvement in the detection limit over the standard molybdenum blue method for phosphate and arsenate by conversion of target analytes present in solution to a solid for quantification by UV-Vis and IR spectroscopy. Furthermore, by recording a visible and infrared spectrum on the same membrane, we were able to selectively determine both phosphate and arsenate. This is not possible using the standard molybdenum blue method.We also developed generalized approach involved the precipitation of polyatomic anions with simple monoatomic cations. We demonstrated this concept with the detection of free and weak acid dissociative (WAD) cyanide in water. In our method, cyanide ions are precipitated with silver ions and then captured on an IR transparent membrane. Key to our approach was the use of an 13CN spiked addition to achieve detection limits below the 0.2 mgL-1 level. Furthermore, we were able to distinguish between free and WAD cyanide by using a spiked addition of sodium sulfide. The sulfide freed the cyanide from the WAD compounds enabling detection of this fraction of cyanide by our method.Using a tops-down approach we generated bismuth telluride nanoparticles for thermoelectric power generation. The "as received" bismuth telluride ingots were ball milled in the presence of the cationic polymer PADAMAc which prevented particle aggregation during the milling process. By adjusting the milling conditions, we were able to control the particle size of the particulate to a small as 40 nm in diameter. Sintering pellets of the particulates below the melting point resulted in voids that scattered the thermal radiation. As a result, we show that adjusting particle size and sintering temperature could be viable strategies for developing TE material.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Membranes. $3 1531702
650 4 $a Mass spectrometry. $3 551172
650 4 $a Gases. $3 559387
650 4 $a Nanoparticles. $3 605747
650 4 $a Molybdenum. $3 3681682
650 4 $a Silicon wafers. $3 3681738
650 4 $a Particle size. $3 3564817
650 4 $a Scientific imaging. $3 3560377
650 4 $a Drinking water. $3 605014
650 4 $a Hot pressing. $3 3704125
650 4 $a Heat conductivity. $3 3681489
650 4 $a Gas flow. $3 3487726
650 4 $a Scanning electron microscopy. $3 551366
650 4 $a Nitrogen. $3 1314426
650 4 $a Analytical chemistry. $3 3168300
650 4 $a Chemistry. $3 516420
650 4 $a Nanotechnology. $3 526235
650 4 $a Thermodynamics. $3 517304
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0486
690 $a 0485
690 $a 0652
690 $a 0348
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a The University of Maine. $3 1029373
773 0 $t Dissertations Abstracts International $g 84-04B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29385980 $z click for full text (PQDT)