One-pot construction of highly efficient TaON/Bi2O3/S–BiOCl ternary photocatalysts: Simultaneously integrating type-Ⅰ with Z-scheme junctions for improved visible light-driven removal of organic pollutants

An Unprecedented Strategy to Fabricate Inside/Surface Homojunction in Bismuth Oxychloride for Efficient Photocatalysis

“…These results indicate the successful doping of S species in BOCS and BOCSO. 33,34 Besides, the BOCO shows an obvious new peak at 31.3°, which can be assigned to the Bi 4 O 5 Cl 12 phase (JCPDS No. 41-0658).…”

Optimal Architecture of a Dual S-Scheme ZnIn2S4–ZnO–Al2O3 Heterosystem with High H2 Evolution Rate under Visible Light

“…Although the different absorption bands of pure ZnO were all preserved in the binary and ternary heterojunctions, there are some obvious distinctions in the intensities of stretching modes at 511 and 3420 cm –1 . The intensity of the O–H stretching mode was observed to be maximum in ZIS–Zn–Al heterojunctions, which as a result, exhibited an enhancement in the hydrophilicity of the designed composite.…”

“…Therefore, the surface area is often considered a key factor in approximating the efficiency of PC reaction . Generally, a large surface area is needed for high adsorption capacity for water and ensuring a maximum number of active sites for the occurrence of interfacial redox reactions to promote the PC water-splitting process . The N 2 adsorption–desorption isotherm in Figure a showed that the ternary ZIS–Zn–Al catalyst exhibited a surface area of 94.77 m 2 g –1 , which is registered to be far superior contrasted to that of 14.65 m 2 g –1 for pure ZnO.…”

“…26 In comparison to pure ZnO, the intensity of the emission band attributed to the band gap recombination of photocarriers exhibits severe quenching for binary catalysts, implying that recombination of photocarriers is highly restrained after coupling of ZnO with Al 27 Although the different absorption bands of pure ZnO were all preserved in the binary and ternary heterojunctions, there are some obvious distinctions in the intensities of stretching modes at 511 and 3420 cm −1 . 28 The intensity of the O−H stretching mode was observed to be maximum in ZIS−Zn−Al heterojunctions, which as a result, exhibited an enhancement in the hydrophilicity of the designed composite. That is why, the polarity of each semiconductor in the fabricated ZIS−Zn−Al heterojunction was enhanced to indicate the powerful interaction among ZnO, Al 2 O 3 , and ZnIn 2 S 4 .…”

“…When the weights of the ZnIn 2 S 4 were 30 and 40 wt %, the H 2 production of the ZIS–Zn–Al catalyst was 47 and 42.5 mmol g –1 h –1 , respectively, after 4 h of visible light illumination. This is because the high density of ZnIn 2 S 4 particles caused aggregation and blocked the active surface of the catalyst, consequently reducing the density of heterogeneous reduction sites to exhibit quenched H 2 production performance . Although the addition of higher content of ZnIn 2 S 4 generated abundant reducing electrons under visible light to react with H + to produce H 2 ; however, excessive content of ZnIn 2 S 4 can act as recombination centers to increase the recombination of photocarriers .…”