Hollow tubular sulfur-doped carbon nitride/graphite-phase carbon nitride homojunction photocatalyst, and preparation method and application thereof

[0044] Example 1

[0045] A hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homojunction photocatalyst of the present invention uses the hollow tubular sulfur-doped carbon nitride as a carrier, and the hollow tubular sulfur-doped carbon nitride is loaded with a graphite phase Carbon nitride, hollow tubular sulfur-doped carbon nitride and graphite phase carbon nitride form a homojunction. The homogeneous junction photocatalyst has a good response and removal effect to tetracycline hydrochloride or tetracycline hydrochloride in wastewater with a pH value of 2-11.

[0046] The preparation method of the hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homojunction photocatalyst in this embodiment includes the following steps:

[0047] (1) Add 1.01 g of melamine (8 mmol) and 1.41 g of thiocyanuric acid (8 mmol) to 80 mL of 50% ethanol solution and mix, and stir at 30°C and 600 rpm magnetically for 4 hours to perform preliminary self-exami

[0050] Example 2

[0051] A hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homojunction photocatalyst of the present invention uses the hollow tubular sulfur-doped carbon nitride as a carrier, and the hollow tubular sulfur-doped carbon nitride is loaded with a graphite phase Carbon nitride, hollow tubular sulfur-doped carbon nitride and graphite phase carbon nitride form a homogeneous junction. The homogeneous junction photocatalyst has a good response and removal effect to tetracycline hydrochloride or tetracycline hydrochloride in wastewater with a pH value of 2-11.

[0052] The preparation method of the hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homojunction photocatalyst in this embodiment is basically the same as that of embodiment 1, except that: in this embodiment, in step (3) The amount of urea added is 0.94g.

[0053] The hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homojunction photocat

[0054] Example 3

[0055] The hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homogeneous junction photocatalyst of the present invention uses the hollow tubular sulfur-doped carbon nitride as a carrier, and the hollow tubular sulfur-doped carbon nitride is loaded with a graphite phase Carbon nitride, hollow tubular sulfur-doped carbon nitride and graphite phase carbon nitride form a homojunction. The homogeneous junction photocatalyst has a good response and removal effect to tetracycline hydrochloride or tetracycline hydrochloride in wastewater with a pH value of 2-11.

[0056] The preparation method of the hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homojunction photocatalyst in this embodiment is basically the same as that of embodiment 1, except that: in this embodiment, in step (3) The amount of urea added was 1.17g.

[0057] The hollow tubular sulfur-doped carbon nitride / graphite phase carbon nitride homojunction photo