“…3. In comparison to pure AgSiO, the absorption bands of AgSiO/Ag 2 CO 3 composites obtained at around ~705 cm −1 , ~893 cm −1 , ~1382 cm −1 , and ~1451 cm −1 are attributed to CO 3
2− in Ag 2 CO 3
1,10 . Compared with pure Ag 2 CO 3 , strong absorption band at around ~1382 cm −1 is found for AgSiO/Ag 2 CO 3 composites, which belongs to the Si-O-Si stretching vibrations 8 .…”
Section: Resultsmentioning
confidence: 89%
“…The intimate contact between AgSiO and Ag 2 CO 3 will strengthen the photogenerated charge separation and transfer 25 . Compared with traditional aggregated or large contact structures, this AgSiO/Ag 2 CO 3 composites can not only provide more surface active sites for sequential photocatalytic reactions, but also shorten the migration distance of photogenerated charges 10 .Figure 5SEM images of ( A ) pure Ag 2 CO 3 , ( B ) pure AgSiO, ( C ) AgSiO/Ag 2 CO 3 -3:1 composite, ( D ) AgSiO/Ag 2 CO 3 -4:1 composite, ( E ) AgSiO/Ag 2 CO 3 -5:1 composite and ( F ) AgSiO/Ag 2 CO 3 -6:1 composite.
…”
Section: Resultsmentioning
confidence: 99%
“…Therefore, visible-light-driven photocatalysts can be exploited by coupling AgSiO with Ag 2 CO 3 NPs. Furthermore, the heterojunctions by coupling them favor the separation of photogenerated electron-hole pairs resulting in the improvement of the photocatalytic activity 9,10 .…”
Coupling two different semiconductors to form composite photocatalysts is an extremely significant technique for environmental remediation. Here, a one-step in-situ precipitation method has been developed to prepare amorphous silver silicate/carbonate (AgSiO/Ag2CO3) nanoparticles (NPs) composites, which are well dispersed sphere-like particles with the sizes of around ~50–100 nm. The high-efficiency photocatalytic activities under visible light (VL) have been carefully evaluated, and the AgSiO/Ag2CO3 NPs composites exhibit selective photocatalytic degradations on Methylene Blue (MB) and Rhodamine B (RhB). The maximum degradation rate for MB can reach ~99.1% within ~40 min under VL irradiation, much higher than that of RhB (~12%) in the same condition, which can be ascribed to (I) the smaller molecule size of MB than that of RhB, (II) the fast charge separation between AgSiO NPs and Ag2CO3 NPs, abundant heterojunction interfaces as well as fully exposed reactive sites. These composites are proposed to be an example for the preparation of other silicate composite photocatalysts for practical applications in environmental remediation.
“…3. In comparison to pure AgSiO, the absorption bands of AgSiO/Ag 2 CO 3 composites obtained at around ~705 cm −1 , ~893 cm −1 , ~1382 cm −1 , and ~1451 cm −1 are attributed to CO 3
2− in Ag 2 CO 3
1,10 . Compared with pure Ag 2 CO 3 , strong absorption band at around ~1382 cm −1 is found for AgSiO/Ag 2 CO 3 composites, which belongs to the Si-O-Si stretching vibrations 8 .…”
Section: Resultsmentioning
confidence: 89%
“…The intimate contact between AgSiO and Ag 2 CO 3 will strengthen the photogenerated charge separation and transfer 25 . Compared with traditional aggregated or large contact structures, this AgSiO/Ag 2 CO 3 composites can not only provide more surface active sites for sequential photocatalytic reactions, but also shorten the migration distance of photogenerated charges 10 .Figure 5SEM images of ( A ) pure Ag 2 CO 3 , ( B ) pure AgSiO, ( C ) AgSiO/Ag 2 CO 3 -3:1 composite, ( D ) AgSiO/Ag 2 CO 3 -4:1 composite, ( E ) AgSiO/Ag 2 CO 3 -5:1 composite and ( F ) AgSiO/Ag 2 CO 3 -6:1 composite.
…”
Section: Resultsmentioning
confidence: 99%
“…Therefore, visible-light-driven photocatalysts can be exploited by coupling AgSiO with Ag 2 CO 3 NPs. Furthermore, the heterojunctions by coupling them favor the separation of photogenerated electron-hole pairs resulting in the improvement of the photocatalytic activity 9,10 .…”
Coupling two different semiconductors to form composite photocatalysts is an extremely significant technique for environmental remediation. Here, a one-step in-situ precipitation method has been developed to prepare amorphous silver silicate/carbonate (AgSiO/Ag2CO3) nanoparticles (NPs) composites, which are well dispersed sphere-like particles with the sizes of around ~50–100 nm. The high-efficiency photocatalytic activities under visible light (VL) have been carefully evaluated, and the AgSiO/Ag2CO3 NPs composites exhibit selective photocatalytic degradations on Methylene Blue (MB) and Rhodamine B (RhB). The maximum degradation rate for MB can reach ~99.1% within ~40 min under VL irradiation, much higher than that of RhB (~12%) in the same condition, which can be ascribed to (I) the smaller molecule size of MB than that of RhB, (II) the fast charge separation between AgSiO NPs and Ag2CO3 NPs, abundant heterojunction interfaces as well as fully exposed reactive sites. These composites are proposed to be an example for the preparation of other silicate composite photocatalysts for practical applications in environmental remediation.
“…The activity of silver based catalysts (SBC) is superior when compared to the traditional photocatalysts. According to literatures, Ag 2 S [14][15][16][17][18], Ag 3 PO 4 [19][20][21][22][23][24][25][26][27][28][29][30][31][32], Ag 2 CrO 4 [33][34][35][36][37], Ag 3 AsO 4 [38,39], AgBr [40][41][42][43][44][45][46][47][48][49][50], AgI [51][52][53][54][55][56], Ag 2 CO 3 [57][58][59][60][61][62][63][64], A...…”
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