Photocatalytic Water Splitting (TiO₂)

2H₂O → 2H₂ + O₂

ภาพรวม

Titanium dioxide absorbs UV light and generates electron-hole pairs that can split water into hydrogen and oxygen. Discovered by Fujishima and Honda in 1972, this reaction is the basis of artificial photosynthesis research. The bandgap of TiO₂ (3.2 eV) limits absorption to UV, so researchers are developing visible-light photocatalysts.

ผู้เข้าร่วม

บทบาท	สาร	สัมประสิทธิ์	สถานะ
สารตั้งต้น	Water H₂O	2	(l)

ตัวอย่างในชีวิตประจำวัน

Self-cleaning glass windows are coated with TiO₂ that photocatalytically decomposes organic dirt when exposed to sunlight.

ความสำคัญทางอุตสาหกรรม

Photocatalytic water splitting could produce green hydrogen fuel from sunlight and water, a key goal of renewable energy research.

คุณสมบัติ

ประเภท: Photochemical
ย้อนกลับได้: ไม่
พลังงาน: ดูดความร้อน
ΔH: 572.0 kJ/mol
ตัวเร่งปฏิกิริยา: TiO₂ (titanium dioxide)

ปฏิกิริยาที่เกี่ยวข้อง

Photochemical Smog Formation (NO₂ Photolysis) Photochromism of Spiropyran Chlorophyll Fluorescence Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Cis-Trans Isomerization of Retinal Photosynthesis Ozone Formation by UV Light Dye-Sensitized Solar Cell (Grätzel Cell)

Frequently Asked Questions

What is the equation for Photocatalytic Water Splitting (TiO₂)?

The balanced equation is: 2H₂O → 2H₂ + O₂.

What type of reaction is Photocatalytic Water Splitting (TiO₂)?

Photocatalytic Water Splitting (TiO₂) is a photochemical reaction.

Is Photocatalytic Water Splitting (TiO₂) exothermic or endothermic?

Photocatalytic Water Splitting (TiO₂) is endothermic (absorbs energy). The enthalpy change (ΔH) is 572.0 kJ/mol.

What conditions are needed for Photocatalytic Water Splitting (TiO₂)?

This reaction requires a catalyst (TiO₂ (titanium dioxide)).