Preparation And Photocatalytic Activity Of Hydroxyapatite Supported BiOCl Nanocomposite For Oxytetracyline Removal

Surface-Modified Poly(l-lactide-co-glycolide) Scaffolds for the Treatment of Osteochondral Critical Size Defects—In Vivo Studies on Rabbits

“…The crystalline structure of HAp was also evidenced by X-ray diffractometry (XRD) ( Figure 2 a), as peaks characteristic for HAp appeared at 2θ around 26° (corresponding to 002 plane), 32° (211 plane), and 40° (310 plane) [ 23 , 24 ]. Fourier transform infrared (FTIR) spectra ( Figure 2 b) also confirmed the presence of HAp coating on PLGA scaffold (intensive bands originating from PO 4 3− group at 600 cm −1 and at 1000–1100 cm −1 ) [ 25 ]. The bands corresponding to PLGA were still present in the spectra for PLGA/HAp scaffold (1757 cm −1 attributed to C=O stretching or 1090 cm −1 and 1185 cm −1 originating from C-O stretching) [ 26 ].…”

Solar light-facilitated oxytetracycline removal from the aqueous phase utilizing a H2O2/ZnWO4/CaO catalytic system

“…The higher rate constant was due to a higher OH • formation and a greater availability of catalyst surface for adsorption of OTC molecules. However, above the optimal concentration, excess loading reduced the photoactivity due to screening of solar light by the higher catalyst dose [10,34]. Fig.…”

“…The increase in the rate constant was due to the higher availability of OTC molecules. The rate constant decreased with an increase in OTC concentration beyond 5.0 × 10 −4 M. This decrease was because OTC acted as a filter for incident radiation and reduced the photoactive volume [10,34]. Second, the excessive adsorption of OTC molecules on the catalyst surface hindered the competitive adsorption of OH • ions, thus reducing the rate of OH • radical formation [10,34].…”

“…Photocatalytic degradation of organic pollutants by semiconductor photocatalysts has emerged as a potential technology for water purification. The advanced oxidation process is a promising technology due to its low cost, simplicity and high efficiency as well as its ability to generate no secondary pollution [9][10][11]. When a photocatalyst is excited with photons of energy equal to or higher than its band gap energy, electrons (e − ) and hole (h + ) pairs are created.…”

“…The adsorption of pollutant onto the catalyst surface is required for the efficient photodegradation process in the aqueous phase [7,10,12]. However, the large-scale application of ZnWO 4 is hindered due to the low adsorptional photocatalytic activity [4].…”