I-Zinc telluride (ZnTe), into ebalulekile ye-semiconductor ye-II-VI, isetshenziswa kabanzi ekutholeni i-infrared, amaseli elanga, kanye namadivayisi e-optoelectronic. Intuthuko yakamuva kubuchwepheshe be-nano kanye ne-green chemistry ithuthukise ukukhiqizwa kwayo. Ngezansi kunezinqubo zokukhiqiza ze-ZnTe ezijwayelekile zamanje kanye nemingcele ebalulekile, kufaka phakathi izindlela zendabuko kanye nentuthuko yesimanje:
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I. Inqubo Yokukhiqiza Yendabuko (Ukwenziwa Okuqondile)
1. Ukulungiswa Kwezinto Ezingavuthiwe
• I-zinc emsulwa kakhulu (i-Zn) kanye ne-tellurium (i-Te): I-Purity ≥99.999% (ibanga le-5N), ixutshwe ngesilinganiso se-molar esingu-1:1.
• Igesi evikelayo: I-argon ehlanzekile kakhulu (Ar) noma i-nitrogen (N₂) ukuvimbela ukungcoliswa.
2. Ukugeleza Kwenqubo
• Isinyathelo 1: Ukwenziwa Kokuncibilikisa I-Vacuum
o Hlanganisa u-Zn no-Te powders epayipini le-quartz bese ususa ku-≤10⁻³ Pa.
o Uhlelo Lokushisa: Shisa ku-5–10°C/min kuya ku-500–700°C, gcina amahora angu-4–6.
o Isibalo sokusabela:Zn+Te→ΔZnTeZn+TeΔZnTe
• Isinyathelo 2: Ukumboza
o Faka umkhiqizo ongahluziwe ku-400–500°C amahora angu-2–3 ukuze unciphise amaphutha e-lattice.
• Isinyathelo 3: Ukuchoboza Nokuhlikihla
o Sebenzisa umshini wokugaya ibhola ukuze ugaye izinto eziningi zibe usayizi wezinhlayiya eziqondiwe (ukugaya ibhola okunamandla aphezulu ukuze kusetshenziswe i-nanoscale).
3. Amapharamitha Ayisihluthulelo
• Ukunemba kokulawula izinga lokushisa: ±5°C
• Izinga lokupholisa: 2–5°C/min (ukugwema imifantu yokucindezeleka kokushisa)
• Usayizi wezinhlayiya zezinto ezingavuthiwe: I-Zn (i-mesh engu-100–200), i-Te (i-mesh engu-200–300)
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II. Inqubo Yesimanje Ethuthukisiwe (Indlela Yokuthambisa I-Solvothermal)
Indlela ye-solvothermal iyindlela eyinhloko yokukhiqiza i-nanoscale ZnTe, enikeza izinzuzo ezifana nosayizi wezinhlayiya olawulekayo kanye nokusetshenziswa kwamandla aphansi.
1. Izinto Zokusetshenziswa Nezinyibilikisi
• Izinto ezingaphambili: i-Zinc nitrate (Zn(NO₃)₂) kanye ne-sodium tellurite (Na₂TeO₃) noma i-tellurium powder (Te).
• Izinto zokunciphisa: i-Hydrazine hydrate (N₂H₄·H₂O) noma i-sodium borohydride (NaBH₄).
• Izinyibilikisi: I-Ethylenediamine (EDA) noma amanzi angenawo ama-ion (amanzi e-DI).
2. Ukugeleza Kwenqubo
• Isinyathelo 1: Ukuqedwa Kwe-Precursor
o Ncibilikisa i-Zn(NO₃)₂ kanye ne-Na₂TeO₃ ngesilinganiso se-molar esingu-1:1 ku-solvent ngaphansi kokuxubha.
• Isinyathelo 2: Ukusabela Kokunciphisa
o Faka i-reducing agent (isb., N₂H₄·H₂O) bese uvala i-autoclave enomfutho ophezulu.
o Izimo zokusabela:
Izinga lokushisa: 180–220°C
Isikhathi: amahora angu-12–24
Ingcindezi: Ezakhelwe yona (3–5 MPa)
o Isibalo sokusabela: I-Zn2++TeO32−+I-ejenti yokunciphisa→I-ZnTe+Imikhiqizo (isb., H₂O, N₂)I-Zn2++TeO32−+I-ejenti yokunciphisa→I-ZnTe+Imikhiqizo (isb., H₂O, N₂)
• Isinyathelo 3: Ngemva kokwelashwa
o Faka i-Centrifuge ukuze uhlukanise umkhiqizo, geza izikhathi ezingu-3-5 nge-ethanol kanye namanzi e-DI.
o Yomisa ngaphansi kwe-vacuum (60–80°C amahora angu-4–6).
3. Amapharamitha Ayisihluthulelo
• Ukuhlushwa kwe-precursor: 0.1–0.5 mol/L
• Ukulawulwa kwe-pH: 9–11 (izimo ze-alkaline zivumela ukusabela)
• Ukulawulwa kosayizi wezinhlayiya: Lungisa ngohlobo lwe-solvent (isb., i-EDA ikhiqiza izintambo ezincane; isigaba samanzi sikhiqiza izinhlayiya ezincane).
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III. Ezinye Izinqubo Ezithuthukisiwe
1. Ukususwa Komusi Wekhemikhali (i-CVD)
• Ukusetshenziswa: Ukulungiswa kwefilimu encane (isib. amaseli elanga).
• Izinto ezingaphambili: I-Diethylzinc (Zn(C₂H₅)₂) kanye ne-diethyltellurium (Te(C₂H₅)₂).
• Amapharamitha:
o Izinga lokushisa lokufakwa: 350–450°C
o Igesi yokuthwala: Ingxube ye-H₂/Ar (isilinganiso sokugeleza: 50–100 sccm)
o Ingcindezi: 10⁻²–10⁻³ I-Torr
2. Ukuxutshwa Kwemishini (Ukugaywa Kwebhola)
• Izici: Ukuhlanganiswa okungenazo izinyibilikisi, okushisa okuphansi.
• Amapharamitha:
o Isilinganiso sebhola kuya ku-powder: 10:1
o Isikhathi sokugaya: amahora angu-20–40
o Isivinini sokuzungeza: 300–500 rpm
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IV. Ukulawulwa Kwekhwalithi Nokuchazwa Kwezimpawu
1. Ukuhlaziywa kobumsulwa: i-X-ray diffraction (XRD) yesakhiwo sekristalu (i-peak eyinhloko ku-2θ ≈25.3°).
2. Ukulawulwa kwesimo: I-transmission electron microscopy (TEM) yobukhulu be-nanoparticle (ejwayelekile: 10–50 nm).
3. Isilinganiso se-Elemental: I-Energy-dispersive X-ray spectroscopy (EDS) noma i-inductively coupled plasma mass spectrometry (ICP-MS) ukuqinisekisa i-Zn ≈1:1.
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V. Izinto Okumelwe Zicatshangelwe Ngokuphepha Nezemvelo
1. Ukwelashwa kwegesi engcolile: Munca i-H₂Te ngezixazululo ze-alkaline (isb., i-NaOH).
2. Ukubuyiswa kwe-solvent: Phinda usebenzise i-organic solvents (isb., i-EDA) ngokuyihlanza.
3. Izindlela zokuzivikela: Sebenzisa izifihla-buso zegesi (ukuvikela i-H₂Te) kanye namagilavu amelana nokugqwala.
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VI. Izitayela Zobuchwepheshe
• Ukwenziwa okuluhlaza: Thuthukisa izinhlelo zesigaba samanzi ukuze kuncishiswe ukusetshenziswa kwe-organic solvent.
• Ukuguqulwa kwe-doping: Thuthukisa ukuguquguquka komoya ngokufaka i-doping nge-Cu, Ag, njll.
• Ukukhiqizwa okukhulu: Sebenzisa ama-reactor aqhubekayo ukuze ufinyelele amaqoqo esikali sama-kg.
Isikhathi sokuthunyelwe: Mashi-21-2025