Abstract:A new type of Gd2BiTaO7 nanocatalyst (GBT) was synthesized by a high-temperature solid-phase method, and a heterojunction photocatalyst, which was composed of GBT and silver phosphate (AP), was prepared by the facile in-situ precipitation method for the first time. The photocatalytic property of GBT or the Ag3PO4/Gd2BiTaO7 heterojunction photocatalyst (AGHP) was reported. The structural properties of GBT and AGHP were characterized by an X-ray diffractometer, scanning electron microscope–X-ray energy dispersiv… Show more
“…Figure14aillustrates the impact of different pH values on the removal efficiency of CPS using DBHP as the catalyst under visible light conditions and in darkness[110]. Remarkably, DBHP exhibited exceptional and consistent degradation efficiency towards CPS under visible light exposure for pH values of 3, 7, and 11.…”
mentioning
confidence: 88%
“…These results not only underscore the pivotal role of DBHP in enhancing the rate of CPS PDP but also contribute significantly to the broader field of photocatalysis, making them of considerable importance. 14a illustrates the impact of different pH values on the removal efficiency of CPS using DBHP as the catalyst under visible light conditions and in darkness [110]. Remarkably, DBHP exhibited exceptional and consistent degradation efficiency towards CPS under visible light exposure for pH values of 3, 7, and 11.…”
Section: Comparison Of Photocatalytic Activitymentioning
confidence: 99%
“…In our study, a solution consisting of 20 mg of the DBHP sample, 90 µL of DMPO (1 mol/L), and 1 mL of deionized water was prepared to detect the •OH radicals or •O2 − radicals produced by DBHP. Figure 16 presents the EPR spectrum for DMPO •O2 − and DMPO •OH when DBHP was used as Figure 14b illustrated the influence of different metal ions on the degradation efficiency of CPS using DBHP as the sample under visible light conditions [110]. Ultrapure water containing various metal ions was introduced into the photocatalytic system.…”
Section: Property Characterizationmentioning
confidence: 99%
“…Water sources with higher proportions of NO 3 − or SO 4 2− exhibited a lesser inhibitory effect on the PDP of CPS. This is due to the fact that NO 3 − or SO 4 2− only consume photoexcited holes within the photocatalytic reaction system, thus resulting in a milder inhibitory effect [110].…”
A groundbreaking photocatalytic nanomaterial, Dy2NdSbO7, was fabricated smoothly using the hydrothermal synthesis technique for the first time. Apart from that, Dy2NdSbO7/Bi2WO6 heterojunction photocatalyst (DBHP) was initially fabricated using the solvothermal fabrication technique. X-ray diffractometer, Fourier-transform infrared spectrometer, Raman spectrometer, UV-visible spectrophotometer, X-ray photoelectron spectrometer, inductively coupled plasma optical emission spectrometer, transmission electron microscope, and X-ray energy dispersive spectroscopy have been applied to evaluate and investigate the thetastructure, morphology, and physicochemical properties of synthesized samples. The results confirmed that the pyrochlore-type crystal structures of Dy2NdSbO7 belonged to the Fd3m space group with the cubic crystal system and the β-pyrochlore-type crystal structures of Bi2WO6 which belonged to the Pca21 space group with orthorhombic crystal system. Under visible light exposure for 155 min (VLP-155min) using DBHP in the capacity of the photocatalytic nanomaterial, the removal efficiency of chlorpyrifos (CPS) saturation reached 100%. Comparison of CPS removal efficiency after VLP-155min revealed that DBHP exhibited higher removal efficiency than Dy2NdSbO7, Bi2WO6, or N-doped TiO2 photocatalyst, with removal efficiency 1.15 times, 1.23 times, or 2.55 times higher, respectively. Furthermore, the oxidizing capability of free radicals was investigated using trapping agents. Results demonstrated that superoxide anions exhibited the strongest oxidative capability, followed by hydroxyl radicals and holes. The results presented in this study lay a robust groundwork for future investigations and advancements in the field of highly efficient heterostructure material. These findings have significant implications for the development of environmental remediation strategies and provide valuable insights into sustainable solutions for addressing CPS contamination.
“…Figure14aillustrates the impact of different pH values on the removal efficiency of CPS using DBHP as the catalyst under visible light conditions and in darkness[110]. Remarkably, DBHP exhibited exceptional and consistent degradation efficiency towards CPS under visible light exposure for pH values of 3, 7, and 11.…”
mentioning
confidence: 88%
“…These results not only underscore the pivotal role of DBHP in enhancing the rate of CPS PDP but also contribute significantly to the broader field of photocatalysis, making them of considerable importance. 14a illustrates the impact of different pH values on the removal efficiency of CPS using DBHP as the catalyst under visible light conditions and in darkness [110]. Remarkably, DBHP exhibited exceptional and consistent degradation efficiency towards CPS under visible light exposure for pH values of 3, 7, and 11.…”
Section: Comparison Of Photocatalytic Activitymentioning
confidence: 99%
“…In our study, a solution consisting of 20 mg of the DBHP sample, 90 µL of DMPO (1 mol/L), and 1 mL of deionized water was prepared to detect the •OH radicals or •O2 − radicals produced by DBHP. Figure 16 presents the EPR spectrum for DMPO •O2 − and DMPO •OH when DBHP was used as Figure 14b illustrated the influence of different metal ions on the degradation efficiency of CPS using DBHP as the sample under visible light conditions [110]. Ultrapure water containing various metal ions was introduced into the photocatalytic system.…”
Section: Property Characterizationmentioning
confidence: 99%
“…Water sources with higher proportions of NO 3 − or SO 4 2− exhibited a lesser inhibitory effect on the PDP of CPS. This is due to the fact that NO 3 − or SO 4 2− only consume photoexcited holes within the photocatalytic reaction system, thus resulting in a milder inhibitory effect [110].…”
A groundbreaking photocatalytic nanomaterial, Dy2NdSbO7, was fabricated smoothly using the hydrothermal synthesis technique for the first time. Apart from that, Dy2NdSbO7/Bi2WO6 heterojunction photocatalyst (DBHP) was initially fabricated using the solvothermal fabrication technique. X-ray diffractometer, Fourier-transform infrared spectrometer, Raman spectrometer, UV-visible spectrophotometer, X-ray photoelectron spectrometer, inductively coupled plasma optical emission spectrometer, transmission electron microscope, and X-ray energy dispersive spectroscopy have been applied to evaluate and investigate the thetastructure, morphology, and physicochemical properties of synthesized samples. The results confirmed that the pyrochlore-type crystal structures of Dy2NdSbO7 belonged to the Fd3m space group with the cubic crystal system and the β-pyrochlore-type crystal structures of Bi2WO6 which belonged to the Pca21 space group with orthorhombic crystal system. Under visible light exposure for 155 min (VLP-155min) using DBHP in the capacity of the photocatalytic nanomaterial, the removal efficiency of chlorpyrifos (CPS) saturation reached 100%. Comparison of CPS removal efficiency after VLP-155min revealed that DBHP exhibited higher removal efficiency than Dy2NdSbO7, Bi2WO6, or N-doped TiO2 photocatalyst, with removal efficiency 1.15 times, 1.23 times, or 2.55 times higher, respectively. Furthermore, the oxidizing capability of free radicals was investigated using trapping agents. Results demonstrated that superoxide anions exhibited the strongest oxidative capability, followed by hydroxyl radicals and holes. The results presented in this study lay a robust groundwork for future investigations and advancements in the field of highly efficient heterostructure material. These findings have significant implications for the development of environmental remediation strategies and provide valuable insights into sustainable solutions for addressing CPS contamination.
“…The results of Rietveld refinement for Eu 2 SmSbO 7 showed that the observed intensities and calculated intensities of the pyrochlore-type structure were in fine agreement. Eu 2 SmSbO 7 was a single-phase, cubic crystal system with a space group of Fd3m (modeled to include O atoms) [62]. The atomic structure of Eu 2 SmSbO 7 is shown in Figure 2b, where the cell parameter a for Eu 2 SmSbO 7 is 10.5547 Å.…”
Eu2SmSbO7 and ZnBiEuO4 were synthesized for the first time using the hydrothermal method. Eu2SmSbO7/ZnBiEuO4 heterojunction photocatalyst (EZHP) was synthesized for the first time using the solvothermal method. The crystal cell parameter of Eu2SmSbO7 was 10.5547 Å. The band gap width of Eu2SmSbO7 was measured and found to be 2.881 eV. The band gap width of ZnBiEuO4 was measured and found to be 2.571 eV. EZHP efficiently degraded the pesticide chlorpyrifos under visible light irradiation (VLID). After VLID of 160 min, the conversion rate of the chlorpyrifos concentration reached 100%, while the conversion rate of the total organic carbon (TOC) concentration was 98.02% using EZHP. After VLID of 160 min, the photocatalytic degradation conversion rates of chlorpyrifos using EZHP were 1.13 times, 1.19 times, and 2.84 times those using Eu2SmSbO7, ZnBiEuO4, and nitrogen-doped titanium dioxide (N-doped TiO2), respectively. The photocatalytic activity could be ranked as follows: EZHP > Eu2SmSbO7 > ZnBiEuO4 > N-doped TiO2. The conversion rates of chlorpyrifos were 98.16%, 97.03%, 96.03%, and 95.06% for four cycles of experiments after VLID of 160 min using EZHP. This indicated that EZHP was stable and could be reused. In addition, the experiments with the addition of capture agents demonstrated that the oxidation removal ability of three oxidation free radicals for degrading chlorpyrifos obeyed the following order: hydroxyl radical > superoxide anion > holes. This study examined the intermediates of chlorpyrifos during the photocatalytic degradation of chlorpyrifos, and a degradation path was proposed, at the same time, the degradation mechanism of chlorpyrifos was revealed. This study provides a scientific basis for the development of efficient heterojunction photocatalysts.
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