Phase transformation and thermal stability of ZnSe QDs due to annealing: emergence of ZnO

Ultrasensitive NO2 Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

“…38 No vibration modes can be observed for any impurity, indicating the high purity of ZnSe nanoflakes. For the ZnSe/ZnO heterojunction sample, the Raman peaks at 325, 714, and 807 39,40 Compared with the Raman spectra of ZnSe, the LO peak and 2TA peak of ZnSe/ZnO heterojunctions show a slight shift of approximately 13 and 11 cm −1 . This is due to the possible incorporation of oxygen into the lattice of the ZnSe matrix, leading to lattice distortion and thus modifying the surface tension in the ZnSe/ZnO heterostructure.…”

S-Scheme Photocatalyst NH2–UiO-66/CuZnS with Enhanced Photothermal-Assisted CO2 Reduction Performances

“…The CZS sample exhibited strong absorption in the UV region, and the introduction of Cu resulted in an absorption shoulder peak at 350–390 nm with an absorption band edge corresponding to approximately 455 nm. This indicates that Cu doping effectively expanded the light absorption range of pure ZnS, enhancing its performance . Furthermore, there was a significant increase in the absorption peak of the CZS sample for IR light, enabling the CZSU to produce both photothermal and photocatalytic effects in photocatalytic reactions, thereby enhancing their efficiency.…”

“…This indicates that Cu doping effectively expanded the light absorption range of pure ZnS, enhancing its performance. 45 Furthermore, there was a significant increase in the absorption peak of the CZS sample for IR light, enabling the CZSU to produce both photothermal and photocatalytic effects in photocatalytic reactions, thereby enhancing their efficiency. In contrast, UIO exhibited a strong absorption peak in the visible region around 400 nm, with an absorption band edge of approximately 445 nm, which is attributed to the incorporation of an amino chromogenic group.…”

Influence of precursor ratio and dopant concentration on the structure and optical properties of Cu-doped ZnCdSe-alloyed quantum dots

“…The obtained values of the lattice parameters for CdSe and ZnSe are well matched with the values reported in the literature. 35,36 The calculated crystallite size shows that there is no signicant variation in the crystallite size of the synthesized alloyed QDs with the Cd/Zn ratio. Therefore, it is concluded that, the change in the band gap is mostly due to the Cd/Zn ratio.…”