Yi Jia,Hui Deng,Xiao Lin,Shenzhong Chen,Yong Xia,Zhixu Wu,Jinling Yu,Shuying Cheng,Yunfeng Lai
Antimony sulfide (Sb 2 S 3 ) with high absorption coefficient reveals great potential for photodetectors (PDs) in various fields of military and national economy. A new type of depleted Sb 2 S 3 thin film photoconductive detector by using titanium dioxide (TiO 2 ) interlayer with the structure of Au/(glass/TiO 2 :)Sb 2 S 3 /Au is designed. Compared with normal Au/Sb 2 S 3 /Au devices, the depleted Sb 2 S 3 PDs obtain a higher switching ratio of 90, greatly enhancing responsivity and specific detectivity. Owing to the electric field of the depletion region, the response time significantly decreases from 23.2 to 0.6 ms. In addition, the anisotropic Sb 2 S 3 film with [120] dominated horizontal orientation is suitable for polarized light detection. The peak-to-valley ratio of the depleted Sb 2 S 3 PD reaches 1.3 at polarized light. The results and methods of this study are expected to expand the application of PDs based on Sb 2 S 3 films.
Ming Wang,Yue Cao,Zhen-Liang Xu,Yu-Xuan Li,Shuang-Mei Xue
Superhydrophilic stainless steel hollow fiber microfiltration membranes (SSHF-MFs) were developed through a facile dip-coating method, followed by sintering at a low temperature of 500 °C. A novel mediating additive was explored to mediate the coating suspensions. The additive, which could form hydrogen bonds with TiO2 agglomerations, facilitated the formation of a continuous TiO2 layer on the rough surface of stainless steel hollow fibers (SSHFs). The fabricated SSHF-MFs exhibited superhydrophilic and underwater superoleophobicity wettability, which enabled SSHF-MFs to be applied to antifouling fields. The fouling resistance of SSHF-MFs for oil/water emulsion, cake layer foulant (sodium alginate, SA), and adhesive foulant (bovine serum albumin, BSA) were investigated systematically. SSHF-MFs exhibited superior antifouling properties and high rejections of 99% and 90% for oil/water emulsion and SA foulant solution, respectively. For the adhesive BSA solution, SSHF-MFs still showed good antifouling property after washing with a dilute alkaline solution and superior separation performance (90%). Meanwhile, SSHF-MFs exhibited an excellent separation performance for polystyrene microspheres (100 nm) with a rejection of 100%. In conclusion, SSHF-MFs showed great potential, not only in traditional microfiltration fields, such as solid–liquid separation, but also in the antifouling field, such as oil/water separation. The facile fabrication conditions and superior wettability further improved the sustainability of SSHF-MFs in practical applications.
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