In the UV-visible absorption spectrum, characteristic absorption band (at 560 nm) of native BR is hyperchromically (aggregation, CTAB), bathochromically (solubilization, SDS) and...

2013年6月8日 · In contrast to CTAB solutions, the UV spectra of CPB solutions are characterized by the presence of two absorption maxima near λ max1 = 191 nm and λ max2 = 259 nm, as well as a shoulder at 210–218 nm. Their existence is caused by the presence of both Br − anions and CP + cations in the solutions.

Therefore, CTAB is used to modify HGQDs producing cetyltrimethylammonium bromide/hydroxylated graphene quantum dots (CTAB/HGQDs). The CTAB will stabilize the HGQDs surface through the non-covalent interaction with the hydroxyl groups (Figure 1) [39].

2024年9月4日 · The developed CTAB/ZnO was found excellent for the photocatalytic degradation of RB-81 under UV irradiation. The developed photocatalyst is tested with several key performance metrics, e.g., QY...

UV-vis spectrum of the (AuBrx (OH)y) − species, however, show a peak at 385 nm (Figure 1 d), while the spectrum of the Au-CTAB complex is red-shifted to 405 nm.

应用无探针的紫外吸收分光光谱法 (UV)测定了十六烷基三甲基溴化铵 (CTAB)溶液的第一、第二临界胶束浓度 (CMC), 并用 1H NMR 谱和动态光散射的实验方法检测到了两个浓度时溶液中聚集体的转变, 从而验证了无探针紫外 光谱法测定 CTAB 溶液第二临界胶束浓度的可行性.

2021年1月1日 · CTAB mediated ZnO nanoparticles were prepared by simple, economical and mass-scale productive method. The effects of CTAB concentration on structural and optical properties of ZnO nanoparticles were investigated. UV–visible absorption results show blue shift in absorbance peak due to quantum confinement effects.

Using in-situ contact angle measurement and ex-situ scanning electron microscopy, we present a direct correlation of the drying profile of CTAB coated AuNRs suspension with observed deposition...

2019年9月18日 · UV–vis result showed that the formation of BiOBr/BiOF hybrids contributed to light absorption towards visible light region and narrowed the band gap. Photocatalytic test showed that BF-5 sample exhibited the highest photocatalytic activity with 93.2% MB degradation efficiency within 80 min, while BF-1 samples only obtained 32.8% MB ...

CCD statistical tool was employed to optimize the photochemical process. In order to assess the effect of different influencing parameters on photochemical degradation of wastewater containing CTAB, four factors – dose of H2O2 (X1), initial CTAB oncentration (X2), pH (X3) and NO3 – concentration (X4) were selected. Each par